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Commit fd8f47d7 authored by Blair Lunceford's avatar Blair Lunceford Committed by Mike Jang
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Consolidate LDAP setup documentation

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doc/administration/auth/README.md
View file @ fd8f47d7
......@@ -21,10 +21,9 @@ providers:
- [Google](../../integration/google.md)
- [JWT](jwt.md)
- [Kerberos](../../integration/kerberos.md)
- [LDAP](ldap.md): Includes Active Directory, Apple Open Directory, Open LDAP,
- [LDAP](ldap/index.md): Includes Active Directory, Apple Open Directory, Open LDAP,
and 389 Server.
- [LDAP for GitLab EE](ldap-ee.md): LDAP additions to GitLab Enterprise Editions **(STARTER ONLY)**
- [Google Secure LDAP](google_secure_ldap.md)
- [Google Secure LDAP](ldap/google_secure_ldap.md)
- [Okta](okta.md)
- [Salesforce](../../integration/salesforce.md)
- [SAML](../../integration/saml.md)
......
doc/administration/auth/google_secure_ldap.md
View file @ fd8f47d7
---
type: reference
redirect_to: 'ldap/google_secure_ldap.md'
---
# Google Secure LDAP **(CORE ONLY)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/46391) in GitLab 11.9.
[Google Cloud Identity](https://cloud.google.com/identity/) provides a Secure
LDAP service that can be configured with GitLab for authentication and group sync.
Secure LDAP requires a slightly different configuration than standard LDAP servers.
The steps below cover:
- Configuring the Secure LDAP Client in the Google Admin console.
- Required GitLab configuration.
## Configuring Google LDAP client
1. Navigate to <https://admin.google.com/Dashboard> and sign in as a GSuite domain administrator.
1. Go to **Apps > LDAP > Add Client**.
1. Provide an `LDAP client name` and an optional `Description`. Any descriptive
values are acceptable. For example, the name could be 'GitLab' and the
description could be 'GitLab LDAP Client'. Click the **Continue** button.
![Add LDAP Client Step 1](img/google_secure_ldap_add_step_1.png)
1. Set **Access Permission** according to your needs. You must choose either
'Entire domain (GitLab)' or 'Selected organizational units' for both 'Verify user
credentials' and 'Read user information'. Select 'Add LDAP Client'
TIP: **Tip:** If you plan to use GitLab [LDAP Group Sync](ldap-ee.md#group-sync)
, turn on 'Read group information'.
![Add LDAP Client Step 2](img/google_secure_ldap_add_step_2.png)
1. Download the generated certificate. This is required for GitLab to
communicate with the Google Secure LDAP service. Save the downloaded certificates
for later use. After downloading, click the **Continue to Client Details** button.
1. Expand the **Service Status** section and turn the LDAP client 'ON for everyone'.
After selecting 'Save', click on the 'Service Status' bar again to collapse
and return to the rest of the settings.
1. Expand the **Authentication** section and choose 'Generate New Credentials'.
Copy/note these credentials for later use. After selecting 'Close', click
on the 'Authentication' bar again to collapse and return to the rest of the settings.
Now the Google Secure LDAP Client configuration is finished. The screenshot below
shows an example of the final settings. Continue on to configure GitLab.
![LDAP Client Settings](img/google_secure_ldap_client_settings.png)
## Configuring GitLab
Edit GitLab configuration, inserting the access credentials and certificate
obtained earlier.
The following are the configuration keys that need to be modified using the
values obtained during the LDAP client configuration earlier:
- `bind_dn`: The access credentials username
- `password`: The access credentials password
- `cert`: The `.crt` file text from the downloaded certificate bundle
- `key`: The `.key` file text from the downloaded certificate bundle
**For Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = YAML.load <<-EOS # remember to close this block with 'EOS' below
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'Google Secure LDAP'
host: 'ldap.google.com'
port: 636
uid: 'uid'
bind_dn: 'DizzyHorse'
password: 'd6V5H8nhMUW9AuDP25abXeLd'
encryption: 'simple_tls'
verify_certificates: true
tls_options:
cert: |
-----BEGIN CERTIFICATE-----
MIIDbDCCAlSgAwIBAgIGAWlzxiIfMA0GCSqGSIb3DQEBCwUAMHcxFDASBgNVBAoTC0dvb2dsZSBJ
bmMuMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3MRQwEgYDVQQDEwtMREFQIENsaWVudDEPMA0GA1UE
CxMGR1N1aXRlMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTAeFw0xOTAzMTIyMTE5
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tQwsmsJvQT5U+GkBt+tGKF/zm7zueHUYqTP7Pg5pxAnAei90qkIRFi17ulObyRHPYv1BbCt8pxNB
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KCSvK1UmaMxNaZyTHg8JnMf0ZuRpv26iSg==
-----END CERTIFICATE-----
key: |
-----BEGIN PRIVATE KEY-----
MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCzk8uGgt/HcoxEpOjfH0bCpPAz
dt2V/xmjRS+TlJpgNSls671QvPNTszXbRpt7zTiMa/XJbXhBv7UMLJrCb0E+VPhpAbfrRihf85u8
7nh1GKkz+z4OacQJwHovdKpCERYte7pTm8kRz2L9QWwrfKcTQeHxv4AF5BWwjccIdXokF10U367m
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4iyUGylviUtVAgMBAAECggEAIPb0CQy0RJoX+q/lGbRVmnyJpYDf+115WNnl+mrwjdGkeZyqw4v0
BPzkWYzUFP1esJRO6buBNFybQRFdFW0z5lvVv/zzRKq71aVUBPInxaMRyHuJ8D5lIL8nDtgVOwyE
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W8cSOLS4TnBBpTLjIpdu+BwbnvYeLF6MmEjNKEufCXKQbaLEgTQ/XNlchBSuzwSIXkbWqdhM1+gx
EjtBAoGARAdMIiDMPWIIZg3nNnFebbmtBP0qiBsYohQZ+6i/8s/vautEHBEN6Q0brIU/goo+nTHc
t9VaOkzjCmAJSLPUanuBC8pdYgLu5J20NXUZLD9AE/2bBT3OpezKcdYeI2jqoc1qlWHlNtVtdqQ2
AcZSFJQjdg5BTyvdEDhaYUKGdRw=
-----END PRIVATE KEY-----
EOS
```
1. Save the file and [reconfigure](../restart_gitlab.md#omnibus-gitlab-reconfigure) GitLab for the changes to take effect.
---
**For installations from source**
1. Edit `config/gitlab.yml`:
```yaml
ldap:
enabled: true
servers:
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'Google Secure LDAP'
host: 'ldap.google.com'
port: 636
uid: 'uid'
bind_dn: 'DizzyHorse'
password: 'd6V5H8nhMUW9AuDP25abXeLd'
encryption: 'simple_tls'
verify_certificates: true
tls_options:
cert: |
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
key: |
-----BEGIN PRIVATE KEY-----
MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCzk8uGgt/HcoxEpOjfH0bCpPAz
dt2V/xmjRS+TlJpgNSls671QvPNTszXbRpt7zTiMa/XJbXhBv7UMLJrCb0E+VPhpAbfrRihf85u8
7nh1GKkz+z4OacQJwHovdKpCERYte7pTm8kRz2L9QWwrfKcTQeHxv4AF5BWwjccIdXokF10U367m
rAmeP5h31+zFZvCZllPbgFSDi1vg0ljhYaw0HbiXRgVyTsgtqxqqHoPfrZAZjR/448aZxJBVvKu4
qPQ3TlKqjYKInQNYfb6Sk7N9POLMtgzoFLyjfbl1sdeLsSMmFGNQ5w8tMHM3LLkbe5fhILQhIKbC
4iyUGylviUtVAgMBAAECggEAIPb0CQy0RJoX+q/lGbRVmnyJpYDf+115WNnl+mrwjdGkeZyqw4v0
BPzkWYzUFP1esJRO6buBNFybQRFdFW0z5lvVv/zzRKq71aVUBPInxaMRyHuJ8D5lIL8nDtgVOwyE
7DOGyDtURUMzMjdUwoTe7K+O6QBU4X/1pVPZYgmissYSMmt68LiP8k0p601F4+r5xOi/QEy44aVp
aOJZBUOisKB8BmUXZqmQ4Cy05vU9Xi1rLyzkn9s7fxnZ+JO6Sd1r0Thm1mE0yuPgxkDBh/b4f3/2
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1QMJJ/vnlyYFTucfGLn6bM//pzTys5Gop0tpcfX/Hf6a6Dd+zBhmC3tBmhr80XOX/PiyAIbc0lOI
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HZGZj1OsD83AoMwVLcdLDgO1kw32dkS8IQKBgFRdgoifAHqqVah7VFB9se7Y1tyi5cXWsXI+Wufr
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+lLMq2YABw+PeJUnqdYE38xsZVHoDjBsVjFGRmbDybeQxauYT7PACy3FAoGBAK2+k9bdNQMbXp7I
j8OszHVkJdz/WXlY1cmdDAxDwXOUGVKIlxTAf7TbiijILZ5gg0Cb+hj+zR9/oI0WXtr+mAv02jWp
W8cSOLS4TnBBpTLjIpdu+BwbnvYeLF6MmEjNKEufCXKQbaLEgTQ/XNlchBSuzwSIXkbWqdhM1+gx
EjtBAoGARAdMIiDMPWIIZg3nNnFebbmtBP0qiBsYohQZ+6i/8s/vautEHBEN6Q0brIU/goo+nTHc
t9VaOkzjCmAJSLPUanuBC8pdYgLu5J20NXUZLD9AE/2bBT3OpezKcdYeI2jqoc1qlWHlNtVtdqQ2
AcZSFJQjdg5BTyvdEDhaYUKGdRw=
-----END PRIVATE KEY-----
```
1. Save the file and [restart](../restart_gitlab.md#installations-from-source) GitLab for the changes to take effect.
<!-- ## Troubleshooting
Include any troubleshooting steps that you can foresee. If you know beforehand what issues
one might have when setting this up, or when something is changed, or on upgrading, it's
important to describe those, too. Think of things that may go wrong and include them here.
This is important to minimize requests for support, and to avoid doc comments with
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If you have none to add when creating a doc, leave this section in place
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This document was moved to [another location](ldap/google_secure_ldap.md).
doc/administration/auth/how_to_configure_ldap_gitlab_ce/index.md
View file @ fd8f47d7
---
type: howto
redirect_to: '../ldap/index.md'
---
# How to configure LDAP with GitLab CE
Managing a large number of users in GitLab can become a burden for system administrators. As an organization grows so do user accounts. Keeping these user accounts in sync across multiple enterprise applications often becomes a time consuming task.
In this guide we will focus on configuring GitLab with Active Directory. [Active Directory](https://en.wikipedia.org/wiki/Active_Directory) is a popular LDAP compatible directory service provided by Microsoft, included in all modern Windows Server operating systems.
GitLab has supported LDAP integration since [version 2.2](https://about.gitlab.com/releases/2012/02/22/gitlab-version-2-2/). With GitLab LDAP [group syncing](../how_to_configure_ldap_gitlab_ee/index.md#group-sync) being added to GitLab Enterprise Edition in [version 6.0](https://about.gitlab.com/releases/2013/08/20/gitlab-6-dot-0-released/). LDAP integration has become one of the most popular features in GitLab.
## Getting started
### Choosing an LDAP Server
The main reason organizations choose to utilize a LDAP server is to keep the entire organization's user base consolidated into a central repository. Users can access multiple applications and systems across the IT environment using a single login. Because LDAP is an open, vendor-neutral, industry standard application protocol, the number of applications using LDAP authentication continues to increase.
There are many commercial and open source [directory servers](https://en.wikipedia.org/wiki/Directory_service#LDAP_implementations) that support the LDAP protocol. Deciding on the right directory server highly depends on the existing IT environment in which the server will be integrated with.
For example, [Active Directory](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/hh831484(v=ws.11)) is generally favored in a primarily Windows environment, as this allows quick integration with existing services. Other popular directory services include:
- [Oracle Internet Directory](https://www.oracle.com/middleware/technologies/internet-directory.html)
- [OpenLDAP](https://www.openldap.org/)
- [389 Directory](http://directory.fedoraproject.org/)
- [OpenDJ (Renamed to Forgerock Directory Services)](https://www.forgerock.com/platform/directory-services)
- [ApacheDS](https://directory.apache.org/)
> GitLab uses the [Net::LDAP](https://rubygems.org/gems/net-ldap) library under the hood. This means it supports all [IETF](https://tools.ietf.org/html/rfc2251) compliant LDAPv3 servers.
### Active Directory (AD)
We won't cover the installation and configuration of Windows Server or Active Directory Domain Services in this tutorial. There are a number of resources online to guide you through this process:
- Install Windows Server 2012 - (`technet.microsoft.com`) - [Installing Windows Server 2012](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/jj134246(v=ws.11))
- Install Active Directory Domain Services (AD DS) (`technet.microsoft.com`) - [Install Active Directory Domain Services](https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/install-active-directory-domain-services--level-100-#BKMK_PS)
> **Shortcut:** You can quickly install AD DS via PowerShell using
`Install-WindowsFeature AD-Domain-Services -IncludeManagementTools`
### Creating an AD **OU** structure
Configuring organizational units (**OU**s) is an important part of setting up Active Directory. **OU**s form the base for an entire organizational structure. Using GitLab as an example we have designed the **OU** structure below using the geographic **OU** model. In the Geographic Model we separate **OU**s for different geographic regions.
| GitLab **OU** Design | GitLab AD Structure |
| :----------------------------: | :------------------------------: |
| ![GitLab OU Design](img/gitlab_ou.png) | ![GitLab AD Structure](img/ldap_ou.gif) |
Using PowerShell you can output the **OU** structure as a table (_all names are examples only_):
```ps
Get-ADObject -LDAPFilter "(objectClass=*)" -SearchBase 'OU=GitLab INT,DC=GitLab,DC=org' -Properties CanonicalName | Format-Table Name,CanonicalName -A
```
```plaintext
OU CanonicalName
---- -------------
GitLab INT GitLab.org/GitLab INT
United States GitLab.org/GitLab INT/United States
Developers GitLab.org/GitLab INT/United States/Developers
Gary Johnson GitLab.org/GitLab INT/United States/Developers/Gary Johnson
Ellis Matthews GitLab.org/GitLab INT/United States/Developers/Ellis Matthews
William Collins GitLab.org/GitLab INT/United States/Developers/William Collins
People Ops GitLab.org/GitLab INT/United States/People Ops
Margaret Baker GitLab.org/GitLab INT/United States/People Ops/Margaret Baker
Libby Hartzler GitLab.org/GitLab INT/United States/People Ops/Libby Hartzler
Victoria Ryles GitLab.org/GitLab INT/United States/People Ops/Victoria Ryles
The Netherlands GitLab.org/GitLab INT/The Netherlands
Developers GitLab.org/GitLab INT/The Netherlands/Developers
John Doe GitLab.org/GitLab INT/The Netherlands/Developers/John Doe
Jon Mealy GitLab.org/GitLab INT/The Netherlands/Developers/Jon Mealy
Jane Weingarten GitLab.org/GitLab INT/The Netherlands/Developers/Jane Weingarten
Production GitLab.org/GitLab INT/The Netherlands/Production
Sarah Konopka GitLab.org/GitLab INT/The Netherlands/Production/Sarah Konopka
Cynthia Bruno GitLab.org/GitLab INT/The Netherlands/Production/Cynthia Bruno
David George GitLab.org/GitLab INT/The Netherlands/Production/David George
United Kingdom GitLab.org/GitLab INT/United Kingdom
Developers GitLab.org/GitLab INT/United Kingdom/Developers
Leroy Fox GitLab.org/GitLab INT/United Kingdom/Developers/Leroy Fox
Christopher Alley GitLab.org/GitLab INT/United Kingdom/Developers/Christopher Alley
Norris Morita GitLab.org/GitLab INT/United Kingdom/Developers/Norris Morita
Support GitLab.org/GitLab INT/United Kingdom/Support
Laura Stanley GitLab.org/GitLab INT/United Kingdom/Support/Laura Stanley
Nikki Schuman GitLab.org/GitLab INT/United Kingdom/Support/Nikki Schuman
Harriet Butcher GitLab.org/GitLab INT/United Kingdom/Support/Harriet Butcher
Global Groups GitLab.org/GitLab INT/Global Groups
DevelopersNL GitLab.org/GitLab INT/Global Groups/DevelopersNL
DevelopersUK GitLab.org/GitLab INT/Global Groups/DevelopersUK
DevelopersUS GitLab.org/GitLab INT/Global Groups/DevelopersUS
ProductionNL GitLab.org/GitLab INT/Global Groups/ProductionNL
SupportUK GitLab.org/GitLab INT/Global Groups/SupportUK
People Ops US GitLab.org/GitLab INT/Global Groups/People Ops US
Global Admins GitLab.org/GitLab INT/Global Groups/Global Admins
```
> See [more information](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-powershell-1.0/ff730967(v=technet.10)) on searching Active Directory with Windows PowerShell from [The Scripting Guys](https://devblogs.microsoft.com/scripting/)
## GitLab LDAP configuration
The initial configuration of LDAP in GitLab requires changes to the `gitlab.rb` configuration file (`/etc/gitlab/gitlab.rb`). Below is an example of a complete configuration using an Active Directory.
The two Active Directory specific values are `active_directory: true` and `uid: 'sAMAccountName'`. `sAMAccountName` is an attribute returned by Active Directory used for GitLab usernames. See the example output from `ldapsearch` for a full list of attributes a "person" object (user) has in **AD** - [`ldapsearch` example](#using-ldapsearch-unix)
> Both group_base and admin_group configuration options are only available in GitLab Enterprise Edition. See [GitLab EE - LDAP Features](../how_to_configure_ldap_gitlab_ee/index.md#gitlab-enterprise-edition---ldap-features) **(STARTER ONLY)**
### Example `gitlab.rb` LDAP
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = {
'main' => {
'label' => 'GitLab AD',
'host' => 'ad.example.org',
'port' => 636,
'uid' => 'sAMAccountName',
'encryption' => 'simple_tls',
'verify_certificates' => true,
'bind_dn' => 'CN=GitLabSRV,CN=Users,DC=GitLab,DC=org',
'password' => 'Password1',
'active_directory' => true,
'base' => 'OU=GitLab INT,DC=GitLab,DC=org',
'group_base' => 'OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=org',
'admin_group' => 'Global Admins'
}
}
```
> **Note:** Remember to run `gitlab-ctl reconfigure` after modifying `gitlab.rb`
## Security improvements (LDAPS)
Security is an important aspect when deploying an LDAP server. By default, LDAP traffic is transmitted unsecured. LDAP can be secured using SSL/TLS called LDAPS, or commonly "LDAP over SSL".
Securing LDAP (enabling LDAPS) on Windows Server 2012 involves installing a valid SSL certificate. For full details see Microsoft's guide [How to enable LDAP over SSL with a third-party certification authority](https://support.microsoft.com/en-us/help/321051/how-to-enable-ldap-over-ssl-with-a-third-party-certification-authority)
> By default a LDAP service listens for connections on TCP and UDP port 389. LDAPS (LDAP over SSL) listens on port 636
### Testing your AD server
#### Using **AdFind** (Windows)
You can use the [`AdFind`](https://social.technet.microsoft.com/wiki/contents/articles/7535.adfind-command-examples.aspx) utility (on Windows based systems) to test that your LDAP server is accessible and authentication is working correctly. This is a freeware utility built by [Joe Richards](http://www.joeware.net/freetools/tools/adfind/index.htm).
**Return all objects**
You can use the filter `objectclass=*` to return all directory objects.
```shell
adfind -h ad.example.org:636 -ssl -u "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" -up Password1 -b "OU=GitLab INT,DC=GitLab,DC=org" -f (objectClass=*)
```
**Return single object using filter**
You can also retrieve a single object by **specifying** the object name or full **DN**. In this example we specify the object name only `CN=Leroy Fox`.
```shell
adfind -h ad.example.org:636 -ssl -u "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" -up Password1 -b "OU=GitLab INT,DC=GitLab,DC=org" -f (&(objectcategory=person)(CN=Leroy Fox))”
```
#### Using **ldapsearch** (Unix)
You can use the `ldapsearch` utility (on Unix based systems) to test that your LDAP server is accessible and authentication is working correctly. This utility is included in the [`ldap-utils`](https://wiki.debian.org/LDAP/LDAPUtils) package.
**Return all objects**
You can use the filter `objectclass=*` to return all directory objects.
```shell
ldapsearch -D "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" \
-w Password1 -p 636 -h ad.example.org \
-b "OU=GitLab INT,DC=GitLab,DC=org" -Z \
-s sub "(objectclass=*)"
```
**Return single object using filter**
You can also retrieve a single object by **specifying** the object name or full **DN**. In this example we specify the object name only `CN=Leroy Fox`.
```shell
ldapsearch -D "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" -w Password1 -p 389 -h ad.example.org -b "OU=GitLab INT,DC=GitLab,DC=org" -Z -s sub "CN=Leroy Fox"
```
**Full output of `ldapsearch` command:** - Filtering for _CN=Leroy Fox_
```plaintext
# LDAPv3
# base <OU=GitLab INT,DC=GitLab,DC=org> with scope subtree
# filter: CN=Leroy Fox
# requesting: ALL
#
# Leroy Fox, Developers, United Kingdom, GitLab INT, GitLab.org
dn: CN=Leroy Fox,OU=Developers,OU=United Kingdom,OU=GitLab INT,DC=GitLab,DC=or
g
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: user
cn: Leroy Fox
sn: Fox
givenName: Leroy
distinguishedName: CN=Leroy Fox,OU=Developers,OU=United Kingdom,OU=GitLab INT,
DC=GitLab,DC=org
instanceType: 4
whenCreated: 20170210030500.0Z
whenChanged: 20170213050128.0Z
displayName: Leroy Fox
uSNCreated: 16790
memberOf: CN=DevelopersUK,OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=org
uSNChanged: 20812
name: Leroy Fox
objectGUID:: rBCAo6NR6E6vfSKgzcUILg==
userAccountControl: 512
badPwdCount: 0
codePage: 0
countryCode: 0
badPasswordTime: 0
lastLogoff: 0
lastLogon: 0
pwdLastSet: 131311695009850084
primaryGroupID: 513
objectSid:: AQUAAAAAAAUVAAAA9GMAb7tdJZvsATf7ZwQAAA==
accountExpires: 9223372036854775807
logonCount: 0
sAMAccountName: Leroyf
sAMAccountType: 805306368
userPrincipalName: Leroyf@GitLab.org
objectCategory: CN=Person,CN=Schema,CN=Configuration,DC=GitLab,DC=org
dSCorePropagationData: 16010101000000.0Z
lastLogonTimestamp: 131314356887754250
# search result
search: 2
result: 0 Success
# numResponses: 2
# numEntries: 1
```
## Basic user authentication
After configuring LDAP, basic authentication will be available. Users can then login using their directory credentials. An extra tab is added to the GitLab login screen for the configured LDAP server (e.g "**GitLab AD**").
![GitLab OU Structure](img/user_auth.gif)
Users that are removed from the LDAP base group (e.g `OU=GitLab INT,DC=GitLab,DC=org`) will be **blocked** in GitLab. [More information](../ldap.md#security) on LDAP security.
If `allow_username_or_email_login` is enabled in the LDAP configuration, GitLab will ignore everything after the first '@' in the LDAP username used on login. Example: The username `jon.doe@example.com` is converted to `jon.doe` when authenticating with the LDAP server. Disable this setting if you use `userPrincipalName` as the `uid`.
## LDAP extended features on GitLab EE
With [GitLab Enterprise Edition (EE)](https://about.gitlab.com/pricing/), besides everything we just described, you'll
have extended functionalities with LDAP, such as:
- Group sync
- Group permissions
- Updating user permissions
- Multiple LDAP servers
Read through the article on [LDAP for GitLab EE](../how_to_configure_ldap_gitlab_ee/index.md) **(STARTER ONLY)** for an overview.
<!-- ## Troubleshooting
Include any troubleshooting steps that you can foresee. If you know beforehand what issues
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# How to configure LDAP with GitLab EE **(STARTER ONLY)**
This article expands on [How to Configure LDAP with GitLab CE](../how_to_configure_ldap_gitlab_ce/index.md). Make sure to read through it before moving forward.
## GitLab Enterprise Edition - LDAP features
[GitLab Enterprise Edition (EE)](https://about.gitlab.com/pricing/) has several advantages when it comes to integrating with Active Directory (LDAP):
- [Administrator Sync](../ldap-ee.md#administrator-sync): As an extension of group sync, you can automatically manage your global GitLab administrators. Specify a group CN for `admin_group` and all members of the LDAP group will be given administrator privileges.
- [Group Sync](#group-sync): This allows GitLab group membership to be automatically updated based on LDAP group members.
- [Multiple LDAP servers](#multiple-ldap-servers): The ability to configure multiple LDAP servers. This is useful if an organization has different LDAP servers within departments. This is not designed for failover. We're working on [supporting LDAP failover](https://gitlab.com/gitlab-org/gitlab/-/issues/139) in GitLab.
- Daily user synchronization: Once a day, GitLab will run a synchronization to check and update GitLab users against LDAP. This process updates all user details automatically.
In the following section, you'll find a description of each of these features. Read through [LDAP GitLab EE docs](../ldap-ee.md) for complementary information.
![GitLab OU Structure](img/admin_group.png)
All members of the group `Global Admins` will be given **administrator** access to GitLab, allowing them to view the `/admin` dashboard.
### Group Sync
Group syncing allows AD (LDAP) groups to be mapped to GitLab groups. This provides more control over per-group user management. To configure group syncing edit the `group_base` **DN** (`'OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=org'`). This **OU** contains all groups that will be associated with [GitLab groups](../../../user/group/index.md).
#### Creating group links - example
As an example, let's suppose we have a "UKGov" GitLab group, which deals with confidential government information. Therefore, users of this group must be given the correct permissions to projects contained within the group. Granular group permissions can be applied based on the AD group.
**UK Developers** of our "UKGov" group are given **"developer"** permissions.
_The developer permission allows the development staff to effectively manage all project code, issues, and merge requests._
**UK Support** staff of our "UKGov" group are given **"reporter"** permissions.
_The reporter permission allows support staff to manage issues, labels, and review project code._
**US People Ops** of our "UKGov" group are given **"guest"** permissions.
![Creating group links](img/group_linking.gif)
> Guest permissions allows people ops staff to review and lodge new issues while allowing no read or write access to project code or [confidential issues](../../../user/project/issues/confidential_issues.md#permissions-and-access-to-confidential-issues) created by other users.
See the [permission list](../../../user/permissions.md) for complementary information.
#### Group permissions - example
Considering the previous example, our staff will have
access to our GitLab instance with the following structure:
![GitLab OU Structure](img/group_link_final.png)
Using this permission structure in our example allows only UK staff access to sensitive information stored in the projects code, while still allowing other teams to work effectively. As all permissions are controlled via AD groups new users can be quickly added to existing groups. New group members will then automatically inherit the required permissions.
> [More information](../ldap-ee.md#group-sync) on group syncing.
### Updating user permissions - new feature
Since GitLab [v8.15](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/822) LDAP user permissions can now be manually overridden by an admin user. To override a user's permissions visit the groups **Members** page and select **Edit permissions**.
![Setting manual permissions](img/manual_permissions.gif)
### Multiple LDAP servers
GitLab EE can support multiple LDAP servers. Simply configure another server in the `gitlab.rb` file within the `ldap_servers` block. In the example below we configure a new secondary server with the label **GitLab Secondary AD**. This is shown on the GitLab login screen. Large enterprises often utilize multiple LDAP servers for segregating organizational departments.
![Multiple LDAP Servers Login](img/multi_login.gif)
Considering the example illustrated on the image above,
our `gitlab.rb` configuration would look like:
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = {
'main' => {
'label' => 'GitLab AD',
'host' => 'ad.example.org',
'port' => 636,
'uid' => 'sAMAccountName',
'method' => 'ssl',
'bind_dn' => 'CN=GitLabSRV,CN=Users,DC=GitLab,DC=org',
'password' => 'Password1',
'active_directory' => true,
'base' => 'OU=GitLab INT,DC=GitLab,DC=org',
'group_base' => 'OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=org',
'admin_group' => 'Global Admins'
},
'secondary' => {
'label' => 'GitLab Secondary AD',
'host' => 'ad-secondary.example.net',
'port' => 636,
'uid' => 'sAMAccountName',
'method' => 'ssl',
'bind_dn' => 'CN=GitLabSRV,CN=Users,DC=GitLab,DC=com',
'password' => 'Password1',
'active_directory' => true,
'base' => 'OU=GitLab Secondary,DC=GitLab,DC=com',
'group_base' => 'OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=com',
'admin_group' => 'Global Admins'
}
}
```
## Conclusion
Integration of GitLab with Active Directory (LDAP) reduces the complexity of user management.
It has the advantage of improving user permission controls, while easing the deployment of GitLab into an existing [IT environment](https://www.techopedia.com/definition/29199/it-infrastructure). GitLab EE offers advanced group management and multiple LDAP servers.
With the assistance of the [GitLab Support](https://about.gitlab.com/support/) team, setting up GitLab with an existing AD/LDAP solution will be a smooth and painless process.
<!-- ## Troubleshooting
Include any troubleshooting steps that you can foresee. If you know beforehand what issues
one might have when setting this up, or when something is changed, or on upgrading, it's
important to describe those, too. Think of things that may go wrong and include them here.
This is important to minimize requests for support, and to avoid doc comments with
questions that you know someone might ask.
Each scenario can be a third-level heading, e.g. `### Getting error message X`.
If you have none to add when creating a doc, leave this section in place
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---
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redirect_to: 'ldap/index.md'
---
# LDAP Additions in GitLab EE **(STARTER ONLY)**
This section documents LDAP features specific to GitLab Enterprise Edition
[Starter](https://about.gitlab.com/pricing/#self-managed) and above.
For documentation relevant to both Community Edition and Enterprise Edition,
see the main [LDAP documentation](ldap.md).
NOTE: **Note:**
[Microsoft Active Directory Trusts](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc771568(v=ws.10)) are not supported
## Use cases
- User sync: Once a day, GitLab will update users against LDAP.
- Group sync: Once an hour, GitLab will update group membership
based on LDAP group members.
## Multiple LDAP servers
With GitLab Enterprise Edition Starter, you can configure multiple LDAP servers
that your GitLab instance will connect to.
To add another LDAP server:
1. Duplicating the settings under [the main configuration](ldap.md#configuration).
1. Edit them to match the additional LDAP server.
Be sure to choose a different provider ID made of letters a-z and numbers 0-9.
This ID will be stored in the database so that GitLab can remember which LDAP
server a user belongs to.
## User sync
Once per day, GitLab will run a worker to check and update GitLab
users against LDAP.
The process will execute the following access checks:
- Ensure the user is still present in LDAP.
- If the LDAP server is Active Directory, ensure the user is active (not
blocked/disabled state). This will only be checked if
`active_directory: true` is set in the LDAP configuration.
NOTE: **Note:**
In Active Directory, a user is marked as disabled/blocked if the user
account control attribute (`userAccountControl:1.2.840.113556.1.4.803`)
has bit 2 set. See <https://ctovswild.com/2009/09/03/bitmask-searches-in-ldap/>
for more information.
The user will be set to `ldap_blocked` state in GitLab if the above conditions
fail. This means the user will not be able to login or push/pull code.
The process will also update the following user information:
- Email address.
- If `sync_ssh_keys` is set, SSH public keys.
- If Kerberos is enabled, Kerberos identity.
NOTE: **Note:**
The LDAP sync process updates existing users while new users will
be created on first sign in.
## Group Sync
If your LDAP supports the `memberof` property, when the user signs in for the
first time GitLab will trigger a sync for groups the user should be a member of.
That way they don't need to wait for the hourly sync to be granted
access to their groups and projects.
A group sync process will run every hour on the hour, and `group_base` must be set
in LDAP configuration for LDAP synchronizations based on group CN to work. This allows
GitLab group membership to be automatically updated based on LDAP group members.
The `group_base` configuration should be a base LDAP 'container', such as an
'organization' or 'organizational unit', that contains LDAP groups that should
be available to GitLab. For example, `group_base` could be
`ou=groups,dc=example,dc=com`. In the config file it will look like the
following.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = YAML.load <<-EOS
main:
## snip...
##
## Base where we can search for groups
##
## Ex. ou=groups,dc=gitlab,dc=example
##
##
group_base: ou=groups,dc=example,dc=com
EOS
```
1. [Apply your changes to GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `/home/git/gitlab/config/gitlab.yml`:
```yaml
production:
ldap:
servers:
main:
# snip...
group_base: ou=groups,dc=example,dc=com
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
To take advantage of group sync, group owners or maintainers will need to [create one
or more LDAP group links](#adding-group-links).
NOTE: **Note:**
If an LDAP user is a group member when LDAP Synchronization is added, and they are not part of the LDAP group, they will be removed from the group.
### Adding group links
Once [group sync has been configured](#group-sync) on the instance, one or more LDAP
groups can be linked to a GitLab group to grant their members access to its
contents.
Group owners or maintainers can add and use LDAP group links by:
1. Navigating to the group's **Settings > LDAP Synchronization** page. Here, one or more
LDAP groups and [filters](#filters-premium-only) can be linked to this GitLab group,
each one with a configured [permission level](../../user/permissions.md#group-members-permissions)
for its members.
1. Updating the group's membership by navigating to the group's **Settings > Members**
page and clicking **Sync now**.
### Filters **(PREMIUM ONLY)**
In GitLab Premium, you can add an LDAP user filter for group synchronization.
Filters allow for complex logic without creating a special LDAP group.
To sync GitLab group membership based on an LDAP filter:
1. Open the **LDAP Synchronization** page for the GitLab group.
1. Select **LDAP user filter** as the **Sync method**.
1. Enter an LDAP user filter in the **LDAP user filter** field.
The filter must comply with the
syntax defined in [RFC 2254](https://tools.ietf.org/search/rfc2254).
## Administrator sync
As an extension of group sync, you can automatically manage your global GitLab
administrators. Specify a group CN for `admin_group` and all members of the
LDAP group will be given administrator privileges. The configuration will look
like the following.
NOTE: **Note:**
Administrators will not be synced unless `group_base` is also
specified alongside `admin_group`. Also, only specify the CN of the admin
group, as opposed to the full DN.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = YAML.load <<-EOS
main:
## snip...
##
## Base where we can search for groups
##
## Ex. ou=groups,dc=gitlab,dc=example
##
##
group_base: ou=groups,dc=example,dc=com
##
## The CN of a group containing GitLab administrators
##
## Ex. administrators
##
## Note: Not `cn=administrators` or the full DN
##
##
admin_group: my_admin_group
EOS
```
1. [Apply your changes to GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `/home/git/gitlab/config/gitlab.yml`:
```yaml
production:
ldap:
servers:
main:
# snip...
group_base: ou=groups,dc=example,dc=com
admin_group: my_admin_group
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Global group memberships lock
"Lock memberships to LDAP synchronization" setting allows instance administrators
to lock down user abilities to invite new members to a group.
When enabled, the following applies:
- Only administrator can manage memberships of any group including access levels.
- Users are not allowed to share project with other groups or invite members to
a project created in a group.
## Adjusting LDAP user sync schedule
> Introduced in GitLab Enterprise Edition Starter.
NOTE: **Note:**
These are cron formatted values. You can use a crontab generator to create
these values, for example <http://www.crontabgenerator.com/>.
By default, GitLab will run a worker once per day at 01:30 a.m. server time to
check and update GitLab users against LDAP.
You can manually configure LDAP user sync times by setting the
following configuration values. The example below shows how to set LDAP user
sync to run once every 12 hours at the top of the hour.
**Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_sync_worker_cron'] = "0 */12 * * *"
```
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source installations**
1. Edit `config/gitlab.yaml`:
```yaml
cron_jobs:
ldap_sync_worker_cron:
"0 */12 * * *"
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Adjusting LDAP group sync schedule
NOTE: **Note:**
These are cron formatted values. You can use a crontab generator to create
these values, for example <http://www.crontabgenerator.com/>.
By default, GitLab will run a group sync process every hour, on the hour.
CAUTION: **Important:**
It's recommended that you do not run too short intervals as this
could lead to multiple syncs running concurrently. This is primarily a concern
for installations with a large number of LDAP users. Please review the
[LDAP group sync benchmark metrics](#benchmarks) to see how
your installation compares before proceeding.
You can manually configure LDAP group sync times by setting the
following configuration values. The example below shows how to set group
sync to run once every 2 hours at the top of the hour.
**Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_group_sync_worker_cron'] = "0 */2 * * * *"
```
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source installations**
1. Edit `config/gitlab.yaml`:
```yaml
cron_jobs:
ldap_group_sync_worker_cron:
"*/30 * * * *"
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## External groups
> Introduced in GitLab Enterprise Edition Starter 8.9.
Using the `external_groups` setting will allow you to mark all users belonging
to these groups as [external users](../../user/permissions.md#external-users-core-only).
Group membership is checked periodically through the `LdapGroupSync` background
task.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = YAML.load <<-EOS
main:
## snip...
##
## An array of CNs of groups containing users that should be considered external
##
## Ex. ['interns', 'contractors']
##
## Note: Not `cn=interns` or the full DN
##
external_groups: ['interns', 'contractors']
EOS
```
1. [Apply your changes to GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
servers:
main:
# snip...
external_groups: ['interns', 'contractors']
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Group sync technical details
There is a lot going on with group sync 'under the hood'. This section
outlines what LDAP queries are executed and what behavior you can expect
from group sync.
Group member access will be downgraded from a higher level if their LDAP group
membership changes. For example, if a user has 'Owner' rights in a group and the
next group sync reveals they should only have 'Developer' privileges, their
access will be adjusted accordingly. The only exception is if the user is the
*last* owner in a group. Groups need at least one owner to fulfill
administrative duties.
### Supported LDAP group types/attributes
GitLab supports LDAP groups that use member attributes:
- `member`
- `submember`
- `uniquemember`
- `memberof`
- `memberuid`.
This means group sync supports, at least, LDAP groups with object class:
`groupOfNames`, `posixGroup`, and `groupOfUniqueNames`.
Other object classes should work fine as long as members
are defined as one of the mentioned attributes. This also means GitLab supports
Microsoft Active Directory, Apple Open Directory, Open LDAP, and 389 Server.
Other LDAP servers should work, too.
Active Directory also supports nested groups. Group sync will recursively
resolve membership if `active_directory: true` is set in the configuration file.
NOTE: **Note:**
Nested group membership will only be resolved if the nested group
also falls within the configured `group_base`. For example, if GitLab sees a
nested group with DN `cn=nested_group,ou=special_groups,dc=example,dc=com` but
the configured `group_base` is `ou=groups,dc=example,dc=com`, `cn=nested_group`
will be ignored.
### Queries
- Each LDAP group is queried a maximum of one time with base `group_base` and
filter `(cn=<cn_from_group_link>)`.
- If the LDAP group has the `memberuid` attribute, GitLab will execute another
LDAP query per member to obtain each user's full DN. These queries are
executed with base `base`, scope 'base object', and a filter depending on
whether `user_filter` is set. Filter may be `(uid=<uid_from_group>)` or a
joining of `user_filter`.
### Benchmarks
Group sync was written to be as performant as possible. Data is cached, database
queries are optimized, and LDAP queries are minimized. The last benchmark run
revealed the following metrics:
For 20000 LDAP users, 11000 LDAP groups and 1000 GitLab groups with 10
LDAP group links each:
- Initial sync (no existing members assigned in GitLab) took 1.8 hours
- Subsequent syncs (checking membership, no writes) took 15 minutes
These metrics are meant to provide a baseline and performance may vary based on
any number of factors. This was a pretty extreme benchmark and most instances will
not have near this many users or groups. Disk speed, database performance,
network and LDAP server response time will affect these metrics.
## Troubleshooting
Please see our [administrator guide to troubleshooting LDAP](ldap-troubleshooting.md).
This document was moved to [another location](ldap/index.md).
doc/administration/auth/ldap-troubleshooting.md
View file @ fd8f47d7
# LDAP Troubleshooting for Administrators
---
redirect_to: 'ldap/ldap-troubleshooting.md'
---
## Common Problems & Workflows
### Connection
#### Connection refused
If you are getting `Connection Refused` errors when trying to connect to the
LDAP server please double-check the LDAP `port` and `encryption` settings used by
GitLab. Common combinations are `encryption: 'plain'` and `port: 389`, OR
`encryption: 'simple_tls'` and `port: 636`.
#### Connection times out
If GitLab cannot reach your LDAP endpoint, you will see a message like this:
```plaintext
Could not authenticate you from Ldapmain because "Connection timed out - user specified timeout".
```
If your configured LDAP provider and/or endpoint is offline or otherwise
unreachable by GitLab, no LDAP user will be able to authenticate and log in.
GitLab does not cache or store credentials for LDAP users to provide authentication
during an LDAP outage.
Contact your LDAP provider or administrator if you are seeing this error.
#### Referral error
If you see `LDAP search error: Referral` in the logs, or when troubleshooting
LDAP Group Sync, this error may indicate a configuration problem. The LDAP
configuration `/etc/gitlab/gitlab.rb` (Omnibus) or `config/gitlab.yml` (source)
is in YAML format and is sensitive to indentation. Check that `group_base` and
`admin_group` configuration keys are indented 2 spaces past the server
identifier. The default identifier is `main` and an example snippet looks like
the following:
```yaml
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'LDAP'
host: 'ldap.example.com'
...
group_base: 'cn=my_group,ou=groups,dc=example,dc=com'
admin_group: 'my_admin_group'
```
#### Query LDAP **(STARTER ONLY)**
The following allows you to perform a search in LDAP using the rails console.
Depending on what you're trying to do, it may make more sense to query [a
user](#query-a-user-in-ldap) or [a group](#query-a-group-in-ldap-starter-only) directly, or
even [use `ldapsearch`](#ldapsearch) instead.
```ruby
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain')
options = {
# :base is required
# use .base or .group_base
base: adapter.config.group_base,
# :filter is optional
# 'cn' looks for all "cn"s under :base
# '*' is the search string - here, it's a wildcard
filter: Net::Ldap::Filter.eq('cn', '*'),
# :attributes is optional
# the attributes we want to get returned
attributes: %w(dn cn memberuid member submember uniquemember memberof)
}
adapter.ldap_search(options)
```
For examples of how this is run,
[review the `Adapter` module](https://gitlab.com/gitlab-org/gitlab/blob/master/ee/lib/ee/gitlab/auth/ldap/adapter.rb).
### User logins
#### No users are found
If [you've confirmed](#ldap-check) that a connection to LDAP can be
established but GitLab doesn't show you LDAP users in the output, one of the
following is most likely true:
- The `bind_dn` user doesn't have enough permissions to traverse the user tree.
- The user(s) don't fall under the [configured `base`](ldap.md#configuration).
- The [configured `user_filter`](ldap.md#using-an-ldap-filter-to-limit-access-to-your-gitlab-server) blocks access to the user(s).
In this case, you con confirm which of the above is true using
[ldapsearch](#ldapsearch) with the existing LDAP configuration in your
`/etc/gitlab/gitlab.rb`.
#### User(s) cannot login
A user can have trouble logging in for any number of reasons. To get started,
here are some questions to ask yourself:
- Does the user fall under the [configured `base`](ldap.md#configuration) in
LDAP? The user must fall under this `base` to login.
- Does the user pass through the [configured `user_filter`](ldap.md#using-an-ldap-filter-to-limit-access-to-your-gitlab-server)?
If one is not configured, this question can be ignored. If it is, then the
user must also pass through this filter to be allowed to login.
- Refer to our docs on [debugging the `user_filter`](#debug-ldap-user-filter).
If the above are both okay, the next place to look for the problem is
the logs themselves while reproducing the issue.
- Ask the user to login and let it fail.
- [Look through the output](#gitlab-logs) for any errors or other
messages about the login. You may see one of the other error messages on
this page, in which case that section can help resolve the issue.
If the logs don't lead to the root of the problem, use the
[rails console](#rails-console) to [query this user](#query-a-user-in-ldap)
to see if GitLab can read this user on the LDAP server.
It can also be helpful to
[debug a user sync](#sync-all-users-starter-only) to
investigate further.
#### Invalid credentials on login
If that the login credentials used are accurate on LDAP, ensure the following
are true for the user in question:
- Make sure the user you are binding with has enough permissions to read the user's
tree and traverse it.
- Check that the `user_filter` is not blocking otherwise valid users.
- Run [an LDAP check command](#ldap-check) to make sure that the LDAP settings
are correct and [GitLab can see your users](#no-users-are-found).
#### Email has already been taken
A user tries to login with the correct LDAP credentials, is denied access,
and the [production.log](../logs.md#productionlog) shows an error that looks like this:
```plaintext
(LDAP) Error saving user <USER DN> (email@example.com): ["Email has already been taken"]
```
This error is referring to the email address in LDAP, `email@example.com`. Email
addresses must be unique in GitLab and LDAP links to a user's primary email (as opposed
to any of their possibly-numerous secondary emails). Another user (or even the
same user) has the email `email@example.com` set as a secondary email, which
is throwing this error.
We can check where this conflicting email address is coming from using the
[rails console](#rails-console). Once in the console, run the following:
```ruby
# This searches for an email among the primary AND secondary emails
user = User.find_by_any_email('email@example.com')
user.username
```
This will show you which user has this email address. One of two steps will
have to be taken here:
- To create a new GitLab user/username for this user when logging in with LDAP,
remove the secondary email to remove the conflict.
- To use an existing GitLab user/username for this user to use with LDAP,
remove this email as a secondary email and make it a primary one so GitLab
will associate this profile to the LDAP identity.
The user can do either of these steps [in their
profile](../../user/profile/index.md#user-profile) or an admin can do it.
#### Debug LDAP user filter
[`ldapsearch`](#ldapsearch) allows you to test your configured
[user filter](ldap.md#using-an-ldap-filter-to-limit-access-to-your-gitlab-server)
to confirm that it returns the users you expect it to return.
```shell
ldapsearch -H ldaps://$host:$port -D "$bind_dn" -y bind_dn_password.txt -b "$base" "$user_filter" sAMAccountName
```
- Variables beginning with a `$` refer to a variable from the LDAP section of
your configuration file.
- Replace `ldaps://` with `ldap://` if you are using the plain authentication method.
Port `389` is the default `ldap://` port and `636` is the default `ldaps://`
port.
- We are assuming the password for the `bind_dn` user is in `bind_dn_password.txt`.
#### Sync all users **(STARTER ONLY)**
The output from a manual [user sync](ldap-ee.md#user-sync) can show you what happens when
GitLab tries to sync its users against LDAP. Enter the [rails console](#rails-console)
and then run:
```ruby
Rails.logger.level = Logger::DEBUG
LdapSyncWorker.new.perform
```
Next, [learn how to read the
output](#example-console-output-after-a-user-sync-starter-only).
##### Example console output after a user sync **(STARTER ONLY)**
The output from a [manual user sync](#sync-all-users-starter-only) will be very verbose, and a
single user's successful sync can look like this:
```shell
Syncing user John, email@example.com
Identity Load (0.9ms) SELECT "identities".* FROM "identities" WHERE "identities"."user_id" = 20 AND (provider LIKE 'ldap%') LIMIT 1
Instantiating Gitlab::Auth::Ldap::Person with LDIF:
dn: cn=John Smith,ou=people,dc=example,dc=com
cn: John Smith
mail: email@example.com
memberof: cn=admin_staff,ou=people,dc=example,dc=com
uid: John
UserSyncedAttributesMetadata Load (0.9ms) SELECT "user_synced_attributes_metadata".* FROM "user_synced_attributes_metadata" WHERE "user_synced_attributes_metadata"."user_id" = 20 LIMIT 1
(0.3ms) BEGIN
Namespace Load (1.0ms) SELECT "namespaces".* FROM "namespaces" WHERE "namespaces"."owner_id" = 20 AND "namespaces"."type" IS NULL LIMIT 1
Route Load (0.8ms) SELECT "routes".* FROM "routes" WHERE "routes"."source_id" = 27 AND "routes"."source_type" = 'Namespace' LIMIT 1
Ci::Runner Load (1.1ms) SELECT "ci_runners".* FROM "ci_runners" INNER JOIN "ci_runner_namespaces" ON "ci_runners"."id" = "ci_runner_namespaces"."runner_id" WHERE "ci_runner_namespaces"."namespace_id" = 27
(0.7ms) COMMIT
(0.4ms) BEGIN
Route Load (0.8ms) SELECT "routes".* FROM "routes" WHERE (LOWER("routes"."path") = LOWER('John'))
Namespace Load (1.0ms) SELECT "namespaces".* FROM "namespaces" WHERE "namespaces"."id" = 27 LIMIT 1
Route Exists (0.9ms) SELECT 1 AS one FROM "routes" WHERE LOWER("routes"."path") = LOWER('John') AND "routes"."id" != 50 LIMIT 1
User Update (1.1ms) UPDATE "users" SET "updated_at" = '2019-10-17 14:40:59.751685', "last_credential_check_at" = '2019-10-17 14:40:59.738714' WHERE "users"."id" = 20
```
There's a lot here, so let's go over what could be helpful when debugging.
First, GitLab will look for all users that have previously
logged in with LDAP and iterate on them. Each user's sync will start with
the following line that contains the user's username and email, as they
exist in GitLab now:
```shell
Syncing user John, email@example.com
```
If you don't find a particular user's GitLab email in the output, then that
user hasn't logged in with LDAP yet.
Next, GitLab searches its `identities` table for the existing
link between this user and the configured LDAP provider(s):
```sql
Identity Load (0.9ms) SELECT "identities".* FROM "identities" WHERE "identities"."user_id" = 20 AND (provider LIKE 'ldap%') LIMIT 1
```
The identity object will have the DN that GitLab will use to look for the user
in LDAP. If the DN isn't found, the email is used instead. We can see that
this user is found in LDAP:
```shell
Instantiating Gitlab::Auth::Ldap::Person with LDIF:
dn: cn=John Smith,ou=people,dc=example,dc=com
cn: John Smith
mail: email@example.com
memberof: cn=admin_staff,ou=people,dc=example,dc=com
uid: John
```
If the user wasn't found in LDAP with either the DN or email, you may see the
following message instead:
```shell
LDAP search error: No Such Object
```
...in which case the user will be blocked:
```shell
User Update (0.4ms) UPDATE "users" SET "state" = $1, "updated_at" = $2 WHERE "users"."id" = $3 [["state", "ldap_blocked"], ["updated_at", "2019-10-18 15:46:22.902177"], ["id", 20]]
```
Once the user is found in LDAP the rest of the output will update the GitLab
database with any changes.
#### Query a user in LDAP
This will test that GitLab can reach out to LDAP and read a particular user.
It can expose potential errors connecting to and/or querying LDAP
that may seem to fail silently in the GitLab UI.
```ruby
Rails.logger.level = Logger::DEBUG
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain') # If `main` is the LDAP provider
Gitlab::Auth::Ldap::Person.find_by_uid('<uid>', adapter)
```
### Group memberships **(STARTER ONLY)**
#### Membership(s) not granted **(STARTER ONLY)**
Sometimes you may think a particular user should be added to a GitLab group via
LDAP group sync, but for some reason it's not happening. There are several
things to check to debug the situation.
- Ensure LDAP configuration has a `group_base` specified.
[This configuration](ldap-ee.md#group-sync) is required for group sync to work properly.
- Ensure the correct [LDAP group link is added to the GitLab
group](ldap-ee.md#adding-group-links).
- Check that the user has an LDAP identity:
1. Sign in to GitLab as an administrator user.
1. Navigate to **Admin area -> Users**.
1. Search for the user
1. Open the user, by clicking on their name. Do not click 'Edit'.
1. Navigate to the **Identities** tab. There should be an LDAP identity with
an LDAP DN as the 'Identifier'. If not, this user hasn't logged in with
LDAP yet and must do so first.
- You've waited an hour or [the configured
interval](ldap-ee.md#adjusting-ldap-group-sync-schedule) for the group to
sync. To speed up the process, either go to the GitLab group **Settings ->
Members** and press **Sync now** (sync one group) or [run the group sync Rake
task](../raketasks/ldap.md#run-a-group-sync-starter-only) (sync all groups).
If all of the above looks good, jump in to a little more advanced debugging in
the rails console.
1. Enter the [rails console](#rails-console).
1. Choose a GitLab group to test with. This group should have an LDAP group link
already configured.
1. [Enable debug logging, find the above GitLab group, and sync it with LDAP](#sync-one-group-starter-only).
1. Look through the output of the sync. See [example log
output](#example-console-output-after-a-group-sync-starter-only)
for how to read the output.
1. If you still aren't able to see why the user isn't being added, [query the
LDAP group directly](#query-a-group-in-ldap-starter-only) to see what members are listed.
1. Is the user's DN or UID in one of the lists from the above output? One of the DNs or
UIDs here should match the 'Identifier' from the LDAP identity checked earlier. If it doesn't,
the user does not appear to be in the LDAP group.
#### Admin privileges not granted
When [Administrator sync](ldap-ee.md#administrator-sync) has been configured
but the configured users aren't granted the correct admin privileges, confirm
the following are true:
- A [`group_base` is also configured](ldap-ee.md#group-sync).
- The configured `admin_group` in the `gitlab.rb` is a CN, rather than a DN or an array.
- This CN falls under the scope of the configured `group_base`.
- The members of the `admin_group` have already logged into GitLab with their LDAP
credentials. GitLab will only grant this admin access to the users whose
accounts are already connected to LDAP.
If all the above are true and the users are still not getting access, [run a manual
group sync](#sync-all-groups-starter-only) in the rails console and [look through the
output](#example-console-output-after-a-group-sync-starter-only) to see what happens when
GitLab syncs the `admin_group`.
#### Sync all groups **(STARTER ONLY)**
NOTE: **NOTE:**
To sync all groups manually when debugging is unnecessary, [use the Rake
task](../raketasks/ldap.md#run-a-group-sync-starter-only) instead.
The output from a manual [group sync](ldap-ee.md#group-sync) can show you what happens
when GitLab syncs its LDAP group memberships against LDAP.
```ruby
Rails.logger.level = Logger::DEBUG
LdapAllGroupsSyncWorker.new.perform
```
Next, [learn how to read the
output](#example-console-output-after-a-group-sync-starter-only).
##### Example console output after a group sync **(STARTER ONLY)**
Like the output from the user sync, the output from the [manual group
sync](#sync-all-groups-starter-only) will also be very verbose. However, it contains lots
of helpful information.
Indicates the point where syncing actually begins:
```shell
Started syncing 'ldapmain' provider for 'my_group' group
```
The following entry shows an array of all user DNs GitLab sees in the LDAP server.
Note that these are the users for a single LDAP group, not a GitLab group. If
you have multiple LDAP groups linked to this GitLab group, you will see multiple
log entries like this - one for each LDAP group. If you don't see an LDAP user
DN in this log entry, LDAP is not returning the user when we do the lookup.
Verify the user is actually in the LDAP group.
```shell
Members in 'ldap_group_1' LDAP group: ["uid=john0,ou=people,dc=example,dc=com",
"uid=mary0,ou=people,dc=example,dc=com", "uid=john1,ou=people,dc=example,dc=com",
"uid=mary1,ou=people,dc=example,dc=com", "uid=john2,ou=people,dc=example,dc=com",
"uid=mary2,ou=people,dc=example,dc=com", "uid=john3,ou=people,dc=example,dc=com",
"uid=mary3,ou=people,dc=example,dc=com", "uid=john4,ou=people,dc=example,dc=com",
"uid=mary4,ou=people,dc=example,dc=com"]
```
Shortly after each of the above entries, you will see a hash of resolved member
access levels. This hash represents all user DNs GitLab thinks should have
access to this group, and at which access level (role). This hash is additive,
and more DNs may be added, or existing entries modified, based on additional
LDAP group lookups. The very last occurrence of this entry should indicate
exactly which users GitLab believes should be added to the group.
NOTE: **Note:**
10 is 'Guest', 20 is 'Reporter', 30 is 'Developer', 40 is 'Maintainer'
and 50 is 'Owner'.
```shell
Resolved 'my_group' group member access: {"uid=john0,ou=people,dc=example,dc=com"=>30,
"uid=mary0,ou=people,dc=example,dc=com"=>30, "uid=john1,ou=people,dc=example,dc=com"=>30,
"uid=mary1,ou=people,dc=example,dc=com"=>30, "uid=john2,ou=people,dc=example,dc=com"=>30,
"uid=mary2,ou=people,dc=example,dc=com"=>30, "uid=john3,ou=people,dc=example,dc=com"=>30,
"uid=mary3,ou=people,dc=example,dc=com"=>30, "uid=john4,ou=people,dc=example,dc=com"=>30,
"uid=mary4,ou=people,dc=example,dc=com"=>30}
```
It's not uncommon to see warnings like the following. These indicate that GitLab
would have added the user to a group, but the user could not be found in GitLab.
Usually this is not a cause for concern.
If you think a particular user should already exist in GitLab, but you're seeing
this entry, it could be due to a mismatched DN stored in GitLab. See
[User DN and/or email have changed](#user-dn-orand-email-have-changed) to update the user's LDAP identity.
```shell
User with DN `uid=john0,ou=people,dc=example,dc=com` should have access
to 'my_group' group but there is no user in GitLab with that
identity. Membership will be updated once the user signs in for
the first time.
```
Finally, the following entry says syncing has finished for this group:
```shell
Finished syncing all providers for 'my_group' group
```
Once all the configured group links have been synchronized, GitLab will look
for any Administrators or External users to sync:
```shell
Syncing admin users for 'ldapmain' provider
```
The output will look similar to what happens with a single group, and then
this line will indicate the sync is finished:
```shell
Finished syncing admin users for 'ldapmain' provider
```
If [admin sync](ldap-ee.md#administrator-sync) is not configured, you'll see a message
stating as such:
```shell
No `admin_group` configured for 'ldapmain' provider. Skipping
```
#### Sync one group **(STARTER ONLY)**
[Syncing all groups](#sync-all-groups-starter-only) can produce a lot of noise in the output, which can be
distracting when you're only interested in troubleshooting the memberships of
a single GitLab group. In that case, here's how you can just sync this group
and see its debug output:
```ruby
Rails.logger.level = Logger::DEBUG
# Find the GitLab group.
# If the output is `nil`, the group could not be found.
# If a bunch of group attributes are in the output, your group was found successfully.
group = Group.find_by(name: 'my_gitlab_group')
# Sync this group against LDAP
EE::Gitlab::Auth::Ldap::Sync::Group.execute_all_providers(group)
```
The output will be similar to
[that you'd get from syncing all groups](#example-console-output-after-a-group-sync-starter-only).
#### Query a group in LDAP **(STARTER ONLY)**
When you'd like to confirm that GitLab can read a LDAP group and see all its members,
you can run the following:
```ruby
# Find the adapter and the group itself
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain') # If `main` is the LDAP provider
ldap_group = EE::Gitlab::Auth::Ldap::Group.find_by_cn('group_cn_here', adapter)
# Find the members of the LDAP group
ldap_group.member_dns
ldap_group.member_uids
```
### User DN or/and email have changed
When an LDAP user is created in GitLab, their LDAP DN is stored for later reference.
If GitLab cannot find a user by their DN, it will fall back
to finding the user by their email. If the lookup is successful, GitLab will
update the stored DN to the new value so both values will now match what's in
LDAP.
If the email has changed and the DN has not, GitLab will find the user with
the DN and update its own record of the user's email to match the one in LDAP.
However, if the primary email _and_ the DN change in LDAP, then GitLab will
have no way of identifying the correct LDAP record of the user and, as a
result, the user will be blocked. To rectify this, the user's existing
profile will have to be updated with at least one of the new values (primary
email or DN) so the LDAP record can be found.
The following script will update the emails for all provided users so they
won't be blocked or unable to access their accounts.
>**NOTE**: The following script will require that any new accounts with the new
email address are removed first. This is because emails have to be unique in GitLab.
Go to the [rails console](#rails-console) and then run:
```ruby
# Each entry will have to include the old username and the new email
emails = {
'ORIGINAL_USERNAME' => 'NEW_EMAIL_ADDRESS',
...
}
emails.each do |username, email|
user = User.find_by_username(username)
user.email = email
user.skip_reconfirmation!
user.save!
end
```
You can then [run a UserSync](#sync-all-users-starter-only) **(STARTER ONLY)** to sync the latest DN
for each of these users.
## Debugging Tools
### LDAP check
The [Rake task to check LDAP](../raketasks/ldap.md#check) is a valuable tool
to help determine whether GitLab can successfully establish a connection to
LDAP and can get so far as to even read users.
If a connection can't be established, it is likely either because of a problem
with your configuration or a firewall blocking the connection.
- Ensure you don't have a firewall blocking the
connection, and that the LDAP server is accessible to the GitLab host.
- Look for an error message in the Rake check output, which may lead to your LDAP configuration to
confirm that the configuration values (specifically `host`, `port`, `bind_dn`, and
`password`) are correct.
- Look for [errors](#connection) in [the logs](#gitlab-logs) to further debug connection failures.
If GitLab can successfully connect to LDAP but doesn't return any
users, [see what to do when no users are found](#no-users-are-found).
### GitLab logs
If a user account is blocked or unblocked due to the LDAP configuration, a
message will be [logged to `application.log`](../logs.md#applicationlog).
If there is an unexpected error during an LDAP lookup (configuration error,
timeout), the login is rejected and a message will be [logged to
`production.log`](../logs.md#productionlog).
### ldapsearch
`ldapsearch` is a utility that will allow you to query your LDAP server. You can
use it to test your LDAP settings and ensure that the settings you're using
will get you the results you expect.
When using `ldapsearch`, be sure to use the same settings you've already
specified in your `gitlab.rb` configuration so you can confirm what happens
when those exact settings are used.
Running this command on the GitLab host will also help confirm that there's no
obstruction between the GitLab host and LDAP.
For example, consider the following GitLab configuration:
```shell
gitlab_rails['ldap_servers'] = YAML.load <<-'EOS' # remember to close this block with 'EOS' below
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'LDAP'
host: '127.0.0.1'
port: 389
uid: 'uid'
encryption: 'plain'
bind_dn: 'cn=admin,dc=ldap-testing,dc=example,dc=com'
password: 'Password1'
active_directory: true
allow_username_or_email_login: false
block_auto_created_users: false
base: 'dc=ldap-testing,dc=example,dc=com'
user_filter: ''
attributes:
username: ['uid', 'userid', 'sAMAccountName']
email: ['mail', 'email', 'userPrincipalName']
name: 'cn'
first_name: 'givenName'
last_name: 'sn'
group_base: 'ou=groups,dc=ldap-testing,dc=example,dc=com'
admin_group: 'gitlab_admin'
EOS
```
You would run the following `ldapsearch` to find the `bind_dn` user:
```shell
ldapsearch -D "cn=admin,dc=ldap-testing,dc=example,dc=com" \
-w Password1 \
-p 389 \
-h 127.0.0.1 \
-b "dc=ldap-testing,dc=example,dc=com"
```
Note that the `bind_dn`, `password`, `port`, `host`, and `base` are all
identical to what's configured in the `gitlab.rb`.
Please see [the official
`ldapsearch` documentation](https://linux.die.net/man/1/ldapsearch) for more.
### Rails console
CAUTION: **CAUTION:**
Please note that it is very easy to create, read, modify, and destroy data on the
rails console, so please be sure to run commands exactly as listed.
The rails console is a valuable tool to help debug LDAP problems. It allows you to
directly interact with the application by running commands and seeing how GitLab
responds to them.
Please refer to [this guide](../troubleshooting/debug.md#starting-a-rails-console-session)
for instructions on how to use the rails console.
#### Enable debug output
This will provide debug output that will be useful to see
what GitLab is doing and with what. This value is not persisted, and will only
be enabled for this session in the rails console.
To enable debug output in the rails console, [enter the rails
console](#rails-console) and run:
```ruby
Rails.logger.level = Logger::DEBUG
```
This document was moved to [another location](ldap/ldap-troubleshooting.md).
doc/administration/auth/ldap.md
View file @ fd8f47d7
---
type: reference
redirect_to: 'ldap/index.md'
---
<!-- If the change is EE-specific, put it in `ldap-ee.md`, NOT here. -->
# LDAP
GitLab integrates with LDAP to support user authentication.
This integration works with most LDAP-compliant directory servers, including:
- Microsoft Active Directory
- Apple Open Directory
- Open LDAP
- 389 Server.
GitLab Enterprise Editions (EE) include enhanced integration,
including group membership syncing as well as multiple LDAP servers support.
For more details about EE-specific LDAP features, see the
[LDAP Enterprise Edition documentation](ldap-ee.md).
NOTE: **Note:**
The information on this page is relevant for both GitLab CE and EE.
## Overview
[LDAP](https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol)
stands for **Lightweight Directory Access Protocol**, which is a standard
application protocol for accessing and maintaining distributed directory
information services over an Internet Protocol (IP) network.
## Security
GitLab assumes that LDAP users:
- Are not able to change their LDAP `mail`, `email`, or `userPrincipalName` attribute.
An LDAP user who is allowed to change their email on the LDAP server can potentially
[take over any account](#enabling-ldap-sign-in-for-existing-gitlab-users)
on your GitLab server.
- Have unique email addresses, otherwise it is possible for LDAP users with the same
email address to share the same GitLab account.
We recommend against using LDAP integration if your LDAP users are
allowed to change their 'mail', 'email' or 'userPrincipalName' attribute on
the LDAP server or share email addresses.
### User deletion
If a user is deleted from the LDAP server, they will be blocked in GitLab as
well. Users will be immediately blocked from logging in. However, there is an
LDAP check cache time of one hour (see note) which means users that
are already logged in or are using Git over SSH will still be able to access
GitLab for up to one hour. Manually block the user in the GitLab Admin Area to
immediately block all access.
NOTE: **Note**:
GitLab Enterprise Edition Starter supports a
[configurable sync time](ldap-ee.md#adjusting-ldap-user-sync-schedule),
with a default of one hour.
## Git password authentication
LDAP-enabled users can always authenticate with Git using their GitLab username
or email and LDAP password, even if password authentication for Git is disabled
in the application settings.
## Google Secure LDAP **(CORE ONLY)**
> Introduced in GitLab 11.9.
[Google Cloud Identity](https://cloud.google.com/identity/) provides a Secure
LDAP service that can be configured with GitLab for authentication and group sync.
See [Google Secure LDAP](google_secure_ldap.md) for detailed configuration instructions.
## Configuration
NOTE: **Note**:
In GitLab Enterprise Edition Starter, you can configure multiple LDAP servers
to connect to one GitLab server.
For a complete guide on configuring LDAP with:
- GitLab Community Edition, see
[How to configure LDAP with GitLab CE](how_to_configure_ldap_gitlab_ce/index.md).
- Enterprise Editions, see
[How to configure LDAP with GitLab EE](how_to_configure_ldap_gitlab_ee/index.md). **(STARTER ONLY)**
To enable LDAP integration you need to add your LDAP server settings in
`/etc/gitlab/gitlab.rb` or `/home/git/gitlab/config/gitlab.yml` for Omnibus
GitLab and installations from source respectively.
There is a Rake task to check LDAP configuration. After configuring LDAP
using the documentation below, see [LDAP check Rake task](../raketasks/check.md#ldap-check)
for information on the LDAP check Rake task.
Prior to version 7.4, GitLab used a different syntax for configuring
LDAP integration. The old LDAP integration syntax still works but may be
removed in a future version. If your `gitlab.rb` or `gitlab.yml` file contains
LDAP settings in both the old syntax and the new syntax, only the __old__
syntax will be used by GitLab.
The configuration inside `gitlab_rails['ldap_servers']` below is sensitive to
incorrect indentation. Be sure to retain the indentation given in the example.
Copy/paste can sometimes cause problems.
NOTE: **Note:**
The `encryption` value `ssl` corresponds to 'Simple TLS' in the LDAP
library. `tls` corresponds to StartTLS, not to be confused with regular TLS.
Normally, if you specify `ssl` it will be on port 636, while `tls` (StartTLS)
would be on port 389. `plain` also operates on port 389.
NOTE: **Note:**
LDAP users must have an email address set, regardless of whether it is used to log in.
**Omnibus configuration**
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['prevent_ldap_sign_in'] = false
gitlab_rails['ldap_servers'] = YAML.load <<-EOS # remember to close this block with 'EOS' below
##
## 'main' is the GitLab 'provider ID' of this LDAP server
##
main:
##
## A human-friendly name for your LDAP server. It is OK to change the label later,
## for instance if you find out it is too large to fit on the web page.
##
## Example: 'Paris' or 'Acme, Ltd.'
##
label: 'LDAP'
##
## Example: 'ldap.mydomain.com'
##
host: '_your_ldap_server'
##
## This port is an example, it is sometimes different but it is always an
## integer and not a string.
##
port: 389 # usually 636 for SSL
uid: 'sAMAccountName' # This should be the attribute, not the value that maps to uid.
##
## Examples: 'america\momo' or 'CN=Gitlab Git,CN=Users,DC=mydomain,DC=com'
##
bind_dn: '_the_full_dn_of_the_user_you_will_bind_with'
password: '_the_password_of_the_bind_user'
##
## Encryption method. The "method" key is deprecated in favor of
## "encryption".
##
## Examples: "start_tls" or "simple_tls" or "plain"
##
## Deprecated values: "tls" was replaced with "start_tls" and "ssl" was
## replaced with "simple_tls".
##
##
encryption: 'plain'
##
## Enables SSL certificate verification if encryption method is
## "start_tls" or "simple_tls". Defaults to true since GitLab 10.0 for
## security. This may break installations upon upgrade to 10.0, that did
## not know their LDAP SSL certificates were not set up properly.
##
verify_certificates: true
# OpenSSL::SSL::SSLContext options.
tls_options:
# Specifies the path to a file containing a PEM-format CA certificate,
# e.g. if you need to use an internal CA.
#
# Example: '/etc/ca.pem'
#
ca_file: ''
# Specifies the SSL version for OpenSSL to use, if the OpenSSL default
# is not appropriate.
#
# Example: 'TLSv1_1'
#
ssl_version: ''
# Specific SSL ciphers to use in communication with LDAP servers.
#
# Example: 'ALL:!EXPORT:!LOW:!aNULL:!eNULL:!SSLv2'
ciphers: ''
# Client certificate
#
# Example:
# cert: |
# -----BEGIN CERTIFICATE-----
# MIIDbDCCAlSgAwIBAgIGAWkJxLmKMA0GCSqGSIb3DQEBCwUAMHcxFDASBgNVBAoTC0dvb2dsZSBJ
# bmMuMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3MRQwEgYDVQQDEwtMREFQIENsaWVudDEPMA0GA1UE
# CxMGR1N1aXRlMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTAeFw0xOTAyMjAwNzE4
# rntnF4d+0dd7zP3jrWkbdtoqjLDT/5D7NYRmVCD5vizV98FJ5//PIHbD1gL3a9b2MPAc6k7NV8tl
# ...
# 4SbuJPAiJxC1LQ0t39dR6oMCAMab3hXQqhL56LrR6cRBp6Mtlphv7alu9xb/x51y2x+g2zWtsf80
# Jrv/vKMsIh/sAyuogb7hqMtp55ecnKxceg==
# -----END CERTIFICATE -----
cert: ''
# Client private key
# key: |
# -----BEGIN PRIVATE KEY-----
# MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC3DmJtLRmJGY4xU1QtI3yjvxO6
# bNuyE4z1NF6Xn7VSbcAaQtavWQ6GZi5uukMo+W5DHVtEkgDwh92ySZMuJdJogFbNvJvHAayheCdN
# 7mCQ2UUT9jGXIbmksUn9QMeJVXTZjgJWJzPXToeUdinx9G7+lpVa62UATEd1gaI3oyL72WmpDy/C
# rntnF4d+0dd7zP3jrWkbdtoqjLDT/5D7NYRmVCD5vizV98FJ5//PIHbD1gL3a9b2MPAc6k7NV8tl
# ...
# +9IhSYX+XIg7BZOVDeYqlPfxRvQh8vy3qjt/KUihmEPioAjLaGiihs1Fk5ctLk9A2hIUyP+sEQv9
# l6RG+a/mW+0rCWn8JAd464Ps9hE=
# -----END PRIVATE KEY-----
key: ''
##
## Set a timeout, in seconds, for LDAP queries. This helps avoid blocking
## a request if the LDAP server becomes unresponsive.
## A value of 0 means there is no timeout.
##
timeout: 10
##
## This setting specifies if LDAP server is Active Directory LDAP server.
## For non AD servers it skips the AD specific queries.
## If your LDAP server is not AD, set this to false.
##
active_directory: true
##
## If allow_username_or_email_login is enabled, GitLab will ignore everything
## after the first '@' in the LDAP username submitted by the user on login.
##
## Example:
## - the user enters 'jane.doe@example.com' and 'p@ssw0rd' as LDAP credentials;
## - GitLab queries the LDAP server with 'jane.doe' and 'p@ssw0rd'.
##
## If you are using "uid: 'userPrincipalName'" on ActiveDirectory you need to
## disable this setting, because the userPrincipalName contains an '@'.
##
allow_username_or_email_login: false
##
## To maintain tight control over the number of active users on your GitLab installation,
## enable this setting to keep new users blocked until they have been cleared by the admin
## (default: false).
##
block_auto_created_users: false
##
## Base where we can search for users
##
## Ex. 'ou=People,dc=gitlab,dc=example' or 'DC=mydomain,DC=com'
##
##
base: ''
##
## Filter LDAP users
##
## Format: RFC 4515 https://tools.ietf.org/search/rfc4515
## Ex. (employeeType=developer)
##
## Note: GitLab does not support omniauth-ldap's custom filter syntax.
##
## Example for getting only specific users:
## '(&(objectclass=user)(|(samaccountname=momo)(samaccountname=toto)))'
##
user_filter: ''
##
## LDAP attributes that GitLab will use to create an account for the LDAP user.
## The specified attribute can either be the attribute name as a string (e.g. 'mail'),
## or an array of attribute names to try in order (e.g. ['mail', 'email']).
## Note that the user's LDAP login will always be the attribute specified as `uid` above.
##
attributes:
##
## The username will be used in paths for the user's own projects
## (like `gitlab.example.com/username/project`) and when mentioning
## them in issues, merge request and comments (like `@username`).
## If the attribute specified for `username` contains an email address,
## the GitLab username will be the part of the email address before the '@'.
##
username: ['uid', 'userid', 'sAMAccountName']
email: ['mail', 'email', 'userPrincipalName']
##
## If no full name could be found at the attribute specified for `name`,
## the full name is determined using the attributes specified for
## `first_name` and `last_name`.
##
name: 'cn'
first_name: 'givenName'
last_name: 'sn'
##
## If lowercase_usernames is enabled, GitLab will lower case the username.
##
lowercase_usernames: false
##
## EE only
##
## Base where we can search for groups
##
## Ex. ou=groups,dc=gitlab,dc=example
##
group_base: ''
## The CN of a group containing GitLab administrators
##
## Ex. administrators
##
## Note: Not `cn=administrators` or the full DN
##
admin_group: ''
## An array of CNs of groups containing users that should be considered external
##
## Ex. ['interns', 'contractors']
##
## Note: Not `cn=interns` or the full DN
##
external_groups: []
##
## The LDAP attribute containing a user's public SSH key
##
## Example: sshPublicKey
##
sync_ssh_keys: false
## GitLab EE only: add more LDAP servers
## Choose an ID made of a-z and 0-9 . This ID will be stored in the database
## so that GitLab can remember which LDAP server a user belongs to.
#uswest2:
# label:
# host:
# ....
EOS
```
**Source configuration**
Use the same format as `gitlab_rails['ldap_servers']` for the contents under
`servers:` in the example below:
```yaml
production:
# snip...
ldap:
enabled: false
prevent_ldap_sign_in: false
servers:
##
## 'main' is the GitLab 'provider ID' of this LDAP server
##
main:
##
## A human-friendly name for your LDAP server. It is OK to change the label later,
## for instance if you find out it is too large to fit on the web page.
##
## Example: 'Paris' or 'Acme, Ltd.'
label: 'LDAP'
## snip...
```
## Using an LDAP filter to limit access to your GitLab server
If you want to limit all GitLab access to a subset of the LDAP users on your
LDAP server, the first step should be to narrow the configured `base`. However,
it is sometimes necessary to filter users further. In this case, you can set up
an LDAP user filter. The filter must comply with
[RFC 4515](https://tools.ietf.org/search/rfc4515).
**Omnibus configuration**
```ruby
gitlab_rails['ldap_servers'] = YAML.load <<-EOS
main:
# snip...
user_filter: '(employeeType=developer)'
EOS
```
**Source configuration**
```yaml
production:
ldap:
servers:
main:
# snip...
user_filter: '(employeeType=developer)'
```
Tip: If you want to limit access to the nested members of an Active Directory
group, you can use the following syntax:
```plaintext
(memberOf:1.2.840.113556.1.4.1941:=CN=My Group,DC=Example,DC=com)
```
Find more information about this "LDAP_MATCHING_RULE_IN_CHAIN" filter at
<https://docs.microsoft.com/en-us/windows/win32/adsi/search-filter-syntax>. Support for
nested members in the user filter should not be confused with
[group sync nested groups support](ldap-ee.md#supported-ldap-group-typesattributes). **(STARTER ONLY)**
Please note that GitLab does not support the custom filter syntax used by
OmniAuth LDAP.
### Escaping special characters
The `user_filter` DN can contain special characters. For example:
- A comma:
```plaintext
OU=GitLab, Inc,DC=gitlab,DC=com
```
- Open and close brackets:
```plaintext
OU=Gitlab (Inc),DC=gitlab,DC=com
```
These characters must be escaped as documented in
[RFC 4515](https://tools.ietf.org/search/rfc4515).
- Escape commas with `\2C`. For example:
```plaintext
OU=GitLab\2C Inc,DC=gitlab,DC=com
```
- Escape open and close brackets with `\28` and `\29`, respectively. For example:
```plaintext
OU=Gitlab \28Inc\29,DC=gitlab,DC=com
```
## Enabling LDAP sign-in for existing GitLab users
When a user signs in to GitLab with LDAP for the first time, and their LDAP
email address is the primary email address of an existing GitLab user, then
the LDAP DN will be associated with the existing user. If the LDAP email
attribute is not found in GitLab's database, a new user is created.
In other words, if an existing GitLab user wants to enable LDAP sign-in for
themselves, they should check that their GitLab email address matches their
LDAP email address, and then sign into GitLab via their LDAP credentials.
## Enabling LDAP username lowercase
Some LDAP servers, depending on their configurations, can return uppercase usernames.
This can lead to several confusing issues such as creating links or namespaces with uppercase names.
GitLab can automatically lowercase usernames provided by the LDAP server by enabling
the configuration option `lowercase_usernames`. By default, this configuration option is `false`.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = YAML.load <<-EOS
main:
# snip...
lowercase_usernames: true
EOS
```
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
servers:
main:
# snip...
lowercase_usernames: true
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Disable LDAP web sign in
It can be useful to prevent using LDAP credentials through the web UI when
an alternative such as SAML is preferred. This allows LDAP to be used for group
sync, while also allowing your SAML identity provider to handle additional
checks like custom 2FA.
When LDAP web sign in is disabled, users will not see a **LDAP** tab on the sign in page.
This does not disable [using LDAP credentials for Git access](#git-password-authentication).
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['prevent_ldap_sign_in'] = true
```
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
prevent_ldap_sign_in: true
```
1. [Restart GitLab](../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Encryption
### TLS Server Authentication
There are two encryption methods, `simple_tls` and `start_tls`.
For either encryption method, if setting `verify_certificates: false`, TLS
encryption is established with the LDAP server before any LDAP-protocol data is
exchanged but no validation of the LDAP server's SSL certificate is performed.
>**Note**: Before GitLab 9.5, `verify_certificates: false` is the default if
unspecified.
## Limitations
### TLS Client Authentication
Not implemented by `Net::LDAP`.
You should disable anonymous LDAP authentication and enable simple or SASL
authentication. The TLS client authentication setting in your LDAP server cannot
be mandatory and clients cannot be authenticated with the TLS protocol.
## Troubleshooting
Please see our [administrator guide to troubleshooting LDAP](ldap-troubleshooting.md).
This document was moved to [another location](ldap/index.md).
doc/administration/auth/ldap/google_secure_ldap.md 0 → 100644
View file @ fd8f47d7
---
type: reference
---
# Google Secure LDAP **(CORE ONLY)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/issues/46391) in GitLab 11.9.
[Google Cloud Identity](https://cloud.google.com/identity/) provides a Secure
LDAP service that can be configured with GitLab for authentication and group sync.
Secure LDAP requires a slightly different configuration than standard LDAP servers.
The steps below cover:
- Configuring the Secure LDAP Client in the Google Admin console.
- Required GitLab configuration.
## Configuring Google LDAP client
1. Navigate to <https://admin.google.com/Dashboard> and sign in as a GSuite domain administrator.
1. Go to **Apps > LDAP > Add Client**.
1. Provide an `LDAP client name` and an optional `Description`. Any descriptive
values are acceptable. For example, the name could be 'GitLab' and the
description could be 'GitLab LDAP Client'. Click the **Continue** button.
![Add LDAP Client Step 1](img/google_secure_ldap_add_step_1.png)
1. Set **Access Permission** according to your needs. You must choose either
'Entire domain (GitLab)' or 'Selected organizational units' for both 'Verify user
credentials' and 'Read user information'. Select 'Add LDAP Client'
TIP: **Tip:** If you plan to use GitLab [LDAP Group Sync](index.md#group-sync-starter-only)
, turn on 'Read group information'.
![Add LDAP Client Step 2](img/google_secure_ldap_add_step_2.png)
1. Download the generated certificate. This is required for GitLab to
communicate with the Google Secure LDAP service. Save the downloaded certificates
for later use. After downloading, click the **Continue to Client Details** button.
1. Expand the **Service Status** section and turn the LDAP client 'ON for everyone'.
After selecting 'Save', click on the 'Service Status' bar again to collapse
and return to the rest of the settings.
1. Expand the **Authentication** section and choose 'Generate New Credentials'.
Copy/note these credentials for later use. After selecting 'Close', click
on the 'Authentication' bar again to collapse and return to the rest of the settings.
Now the Google Secure LDAP Client configuration is finished. The screenshot below
shows an example of the final settings. Continue on to configure GitLab.
![LDAP Client Settings](img/google_secure_ldap_client_settings.png)
## Configuring GitLab
Edit GitLab configuration, inserting the access credentials and certificate
obtained earlier.
The following are the configuration keys that need to be modified using the
values obtained during the LDAP client configuration earlier:
- `bind_dn`: The access credentials username
- `password`: The access credentials password
- `cert`: The `.crt` file text from the downloaded certificate bundle
- `key`: The `.key` file text from the downloaded certificate bundle
**For Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = YAML.load <<-EOS # remember to close this block with 'EOS' below
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'Google Secure LDAP'
host: 'ldap.google.com'
port: 636
uid: 'uid'
bind_dn: 'DizzyHorse'
password: 'd6V5H8nhMUW9AuDP25abXeLd'
encryption: 'simple_tls'
verify_certificates: true
tls_options:
cert: |
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
key: |
-----BEGIN PRIVATE KEY-----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1QMJJ/vnlyYFTucfGLn6bM//pzTys5Gop0tpcfX/Hf6a6Dd+zBhmC3tBmhr80XOX/PiyAIbc0lOI
31rafZuD/oVx5mlIySWX35EqS14LXmdVs/5vOhsInNgNiE+EPFf1L9YZgG/zA7OUBmqtTeYIPDVC
7ViJcydItQKBgQDFmK0H0IA6W4opGQo+zQKhefooqZ+RDk9IIZMPOAtnvOM7y3rSVrfsSjzYVuMS
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HZGZj1OsD83AoMwVLcdLDgO1kw32dkS8IQKBgFRdgoifAHqqVah7VFB9se7Y1tyi5cXWsXI+Wufr
j9U9nQ4GojK52LqpnH4hWnOelDqMvF6TQTyLIk/B+yWWK26Ft/dk9wDdSdystd8L+dLh4k0Y+Whb
+lLMq2YABw+PeJUnqdYE38xsZVHoDjBsVjFGRmbDybeQxauYT7PACy3FAoGBAK2+k9bdNQMbXp7I
j8OszHVkJdz/WXlY1cmdDAxDwXOUGVKIlxTAf7TbiijILZ5gg0Cb+hj+zR9/oI0WXtr+mAv02jWp
W8cSOLS4TnBBpTLjIpdu+BwbnvYeLF6MmEjNKEufCXKQbaLEgTQ/XNlchBSuzwSIXkbWqdhM1+gx
EjtBAoGARAdMIiDMPWIIZg3nNnFebbmtBP0qiBsYohQZ+6i/8s/vautEHBEN6Q0brIU/goo+nTHc
t9VaOkzjCmAJSLPUanuBC8pdYgLu5J20NXUZLD9AE/2bBT3OpezKcdYeI2jqoc1qlWHlNtVtdqQ2
AcZSFJQjdg5BTyvdEDhaYUKGdRw=
-----END PRIVATE KEY-----
EOS
```
1. Save the file and [reconfigure](../../restart_gitlab.md#omnibus-gitlab-reconfigure) GitLab for the changes to take effect.
---
**For installations from source**
1. Edit `config/gitlab.yml`:
```yaml
ldap:
enabled: true
servers:
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'Google Secure LDAP'
host: 'ldap.google.com'
port: 636
uid: 'uid'
bind_dn: 'DizzyHorse'
password: 'd6V5H8nhMUW9AuDP25abXeLd'
encryption: 'simple_tls'
verify_certificates: true
tls_options:
cert: |
-----BEGIN CERTIFICATE-----
MIIDbDCCAlSgAwIBAgIGAWlzxiIfMA0GCSqGSIb3DQEBCwUAMHcxFDASBgNVBAoTC0dvb2dsZSBJ
bmMuMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3MRQwEgYDVQQDEwtMREFQIENsaWVudDEPMA0GA1UE
CxMGR1N1aXRlMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTAeFw0xOTAzMTIyMTE5
MThaFw0yMjAzMTEyMTE5MThaMHcxFDASBgNVBAoTC0dvb2dsZSBJbmMuMRYwFAYDVQQHEw1Nb3Vu
dGFpbiBWaWV3MRQwEgYDVQQDEwtMREFQIENsaWVudDEPMA0GA1UECxMGR1N1aXRlMQswCQYDVQQG
EwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
ALOTy4aC38dyjESk6N8fRsKk8DN23ZX/GaNFL5OUmmA1KWzrvVC881OzNdtGm3vNOIxr9clteEG/
tQwsmsJvQT5U+GkBt+tGKF/zm7zueHUYqTP7Pg5pxAnAei90qkIRFi17ulObyRHPYv1BbCt8pxNB
4fG/gAXkFbCNxwh1eiQXXRTfruasCZ4/mHfX7MVm8JmWU9uAVIOLW+DSWOFhrDQduJdGBXJOyC2r
Gqoeg9+tkBmNH/jjxpnEkFW8q7io9DdOUqqNgoidA1h9vpKTs3084sy2DOgUvKN9uXWx14uxIyYU
Y1DnDy0wczcsuRt7l+EgtCEgpsLiLJQbKW+JS1UCAwEAATANBgkqhkiG9w0BAQsFAAOCAQEAf60J
yazhbHkDKIH2gFxfm7QLhhnqsmafvl4WP7JqZt0u0KdnvbDPfokdkM87yfbKJU1MTI86M36wEC+1
P6bzklKz7kXbzAD4GggksAzxsEE64OWHC+Y64Tkxq2NiZTw/76POkcg9StiIXjG0ZcebHub9+Ux/
rTncip92nDuvgEM7lbPFKRIS/YMhLCk09B/U0F6XLsf1yYjyf5miUTDikPkov23b/YGfpc8kh6hq
1kqdi6a1cYPP34eAhtRhMqcZU9qezpJF6s9EeN/3YFfKzLODFSsVToBRAdZgGHzj//SAtLyQTD4n
KCSvK1UmaMxNaZyTHg8JnMf0ZuRpv26iSg==
-----END CERTIFICATE-----
key: |
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
```
1. Save the file and [restart](../../restart_gitlab.md#installations-from-source) GitLab for the changes to take effect.
<!-- ## Troubleshooting
Include any troubleshooting steps that you can foresee. If you know beforehand what issues
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doc/administration/auth/ldap/index.md 0 → 100644
View file @ fd8f47d7
---
type: reference
---
# General LDAP Setup
GitLab integrates with LDAP to support user authentication.
This integration works with most LDAP-compliant directory servers, including:
- Microsoft Active Directory
- Apple Open Directory
- Open LDAP
- 389 Server
GitLab Enterprise Editions (EE) include enhanced integration,
including group membership syncing as well as multiple LDAP servers support.
NOTE: **Note:**
[Microsoft Active Directory Trusts](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc771568(v=ws.10)) are not supported.
## Overview
[LDAP](https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol)
stands for **Lightweight Directory Access Protocol**, which is a standard
application protocol for accessing and maintaining distributed directory
information services over an Internet Protocol (IP) network.
## Security **(CORE ONLY)**
GitLab assumes that LDAP users:
- Are not able to change their LDAP `mail`, `email`, or `userPrincipalName` attributes.
An LDAP user who is allowed to change their email on the LDAP server can potentially
[take over any account](#enabling-ldap-sign-in-for-existing-gitlab-users-core-only)
on your GitLab server.
- Have unique email addresses, otherwise it is possible for LDAP users with the same
email address to share the same GitLab account.
We recommend against using LDAP integration if your LDAP users are
allowed to change their 'mail', 'email' or 'userPrincipalName' attribute on
the LDAP server or share email addresses.
### User deletion **(CORE ONLY)**
If a user is deleted from the LDAP server, they will be blocked in GitLab as
well. Users will be immediately blocked from logging in. However, there is an
LDAP check cache time of one hour (see note) which means users that
are already logged in or are using Git over SSH will still be able to access
GitLab for up to one hour. Manually block the user in the GitLab Admin Area to
immediately block all access.
NOTE: **Note**:
GitLab Enterprise Edition Starter supports a
[configurable sync time](#adjusting-ldap-user-sync-schedule-starter-only).
## Git password authentication **(CORE ONLY)**
LDAP-enabled users can always authenticate with Git using their GitLab username
or email and LDAP password, even if password authentication for Git is disabled
in the application settings.
## Enabling LDAP sign-in for existing GitLab users **(CORE ONLY)**
When a user signs in to GitLab with LDAP for the first time, and their LDAP
email address is the primary email address of an existing GitLab user, then
the LDAP DN will be associated with the existing user. If the LDAP email
attribute is not found in GitLab's database, a new user is created.
In other words, if an existing GitLab user wants to enable LDAP sign-in for
themselves, they should check that their GitLab email address matches their
LDAP email address, and then sign into GitLab via their LDAP credentials.
## Google Secure LDAP **(CORE ONLY)**
> Introduced in GitLab 11.9.
[Google Cloud Identity](https://cloud.google.com/identity/) provides a Secure
LDAP service that can be configured with GitLab for authentication and group sync.
See [Google Secure LDAP](google_secure_ldap.md) for detailed configuration instructions.
## Configuration **(CORE ONLY)**
To enable LDAP integration you need to add your LDAP server settings in
`/etc/gitlab/gitlab.rb` or `/home/git/gitlab/config/gitlab.yml` for Omnibus
GitLab and installations from source respectively.
There is a Rake task to check LDAP configuration. After configuring LDAP
using the documentation below, see [LDAP check Rake task](../../raketasks/check.md#ldap-check)
for information on the LDAP check Rake task.
NOTE: **Note:**
The `encryption` value `simple_tls` corresponds to 'Simple TLS' in the LDAP
library. `start_tls` corresponds to StartTLS, not to be confused with regular TLS.
Normally, if you specify `simple_tls` it will be on port 636, while `start_tls` (StartTLS)
would be on port 389. `plain` also operates on port 389. Removed values: "tls" was replaced with "start_tls" and "ssl" was replaced with "simple_tls".
NOTE: **Note:**
LDAP users must have an email address set, regardless of whether it is used to log in.
### Example Configurations **(CORE ONLY)**
**Omnibus Configuration**
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['prevent_ldap_sign_in'] = false
gitlab_rails['ldap_servers'] = {
'main' => {
'label' => 'LDAP',
'host' => 'ldap.mydomain.com',
'port' => 389,
'uid' => 'sAMAccountName',
'encryption' => 'simple_tls',
'verify_certificates' => true,
'bind_dn' => '_the_full_dn_of_the_user_you_will_bind_with',
'password' => '_the_password_of_the_bind_user',
'encryption' => 'plain',
'verify_certificates' => true,
'tls_options' => {
'ca_file' => '',
'ssl_version' => '',
'ciphers' => '',
'cert' => '',
'key' => ''
},
'timeout' => 10,
'active_directory' => true,
'allow_username_or_email_login' => false,
'block_auto_created_users' => false,
'base' => 'dc=example,dc=com',
'user_filter' => '',
'attributes' => {
'username' => ['uid', 'userid', 'sAMAccountName'],
'email' => ['mail', 'email', 'userPrincipalName'],
'name' => 'cn',
'first_name' => 'givenName',
'last_name' => 'sn'
},
'lowercase_usernames' => false,
# EE Only
'group_base' => '',
'admin_group' => '',
'external_groups' => [],
'sync_ssh_keys' => false
}
}
```
**Source Configuration**
```yaml
production:
# snip...
ldap:
enabled: false
prevent_ldap_sign_in: false
servers:
main:
label: 'LDAP'
...
```
### Basic Configuration Settings **(CORE ONLY)**
| Setting | Description | Required | Examples |
| ------- | ----------- | -------- | -------- |
| `label` | A human-friendly name for your LDAP server. It will be displayed on your login page. | yes | `'Paris'` or `'Acme, Ltd.'` |
| `host` | IP address or domain name of your LDAP server. | yes | `'ldap.mydomain.com'` |
| `port` | The port to connect with on your LDAP server. Always an integer, not a string. | yes | `389` or `636` (for SSL) |
| `uid` | LDAP attribute for username. Should be the attribute, not the value that maps to the `uid`. | yes | `'sAMAccountName'`, `'uid'`, `'userPrincipalName'` |
| `bind_dn` | The full DN of the user you will bind with. | no | `'america\momo'` or `'CN=Gitlab,OU=Users,DC=domain,DC=com'` |
| `password` | The password of the bind user. | no | `'your_great_password'` |
| `encryption` | Encryption method. The `method` key is deprecated in favor of `encryption`. | yes | `'start_tls'` or `'simple_tls'` or `'plain'` |
| `verify_certificates` | Enables SSL certificate verification if encryption method is "start_tls" or "simple_tls". Defaults to true. | no | boolean |
| `timeout` | Set a timeout, in seconds, for LDAP queries. This helps avoid blocking a request if the LDAP server becomes unresponsive. A value of 0 means there is no timeout. | no | `10` or `30` |
| `active_directory` | This setting specifies if LDAP server is Active Directory LDAP server. For non-AD servers it skips the AD specific queries. If your LDAP server is not AD, set this to false. | no | boolean |
| `allow_username_or_email_login` | If enabled, GitLab will ignore everything after the first `@` in the LDAP username submitted by the user on login. If you are using `uid: 'userPrincipalName'` on ActiveDirectory you need to disable this setting, because the userPrincipalName contains an `@`. | no | boolean |
| `block_auto_created_users` | To maintain tight control over the number of active users on your GitLab installation, enable this setting to keep new users blocked until they have been cleared by the admin (default: false). | no | boolean |
| `base` | Base where we can search for users. | yes | `'ou=people,dc=gitlab,dc=example'` or `'DC=mydomain,DC=com'` |
| `user_filter` | Filter LDAP users. Format: [RFC 4515](https://tools.ietf.org/search/rfc4515) Note: GitLab does not support `omniauth-ldap`'s custom filter syntax. | no | `'(employeeType=developer)'` or `'(&(objectclass=user)(|(samaccountname=momo)(samaccountname=toto)))'` |
| `lowercase_usernames` | If lowercase_usernames is enabled, GitLab will lower case the username. | no | boolean |
### SSL Configuration Settings **(CORE ONLY)**
| Setting | Description | Required | Examples |
| ------- | ----------- | -------- | -------- |
| `ca_file` | Specifies the path to a file containing a PEM-format CA certificate, e.g. if you need to use an internal CA. | no | `'/etc/ca.pem'` |
| `ssl_version` | Specifies the SSL version for OpenSSL to use, if the OpenSSL default is not appropriate. | no | `'TLSv1_1'` |
| `ciphers` | Specific SSL ciphers to use in communication with LDAP servers. | no | `'ALL:!EXPORT:!LOW:!aNULL:!eNULL:!SSLv2'` |
| `cert` | Client certificate | no | `'-----BEGIN CERTIFICATE----- <REDACTED> -----END CERTIFICATE -----'` |
| `key` | Client private key | no | `'-----BEGIN PRIVATE KEY----- <REDACTED> -----END PRIVATE KEY -----'` |
### Attribute Configuration Settings **(CORE ONLY)**
LDAP attributes that GitLab will use to create an account for the LDAP user. The specified attribute can either be the attribute name as a string (e.g. `'mail'`), or an array of attribute names to try in order (e.g. `['mail', 'email']`). Note that the user's LDAP login will always be the attribute specified as `uid` above.
| Setting | Description | Required | Examples |
| ------- | ----------- | -------- | -------- |
| `username` | The username will be used in paths for the user's own projects (like `gitlab.example.com/username/project`) and when mentioning them in issues, merge request and comments (like `@username`). If the attribute specified for `username` contains an email address, the GitLab username will be the part of the email address before the `@`. | no | `['uid', 'userid', 'sAMAccountName']` |
| `email` | LDAP attribute for user email. | no | `['mail', 'email', 'userPrincipalName']` |
| `name` | LDAP attribute for user display name. If no full name could be found at the attribute specified for `name`, the full name is determined using the attributes specified for `first_name` and `last_name`. | no | `'cn'` or `'displayName'` |
| `first_name` | LDAP attribute for user first name. | no | `'givenName'` |
| `last_name` | LDAP attribute for user last name. | no | `'sn'` |
### LDAP Sync Configuration Settings **(STARTER ONLY)**
| Setting | Description | Required | Examples |
| ------- | ----------- | -------- | -------- |
| `group_base` | Base used to search for groups. | no | `'ou=groups,dc=gitlab,dc=example'` |
| `admin_group` | The CN of a group containing GitLab administrators. Note: Not `cn=administrators` or the full DN. | no | `'administrators'` |
| `external_groups` | An array of CNs of groups containing users that should be considered external. Note: Not `cn=interns` or the full DN. | no | `['interns', 'contractors']` |
| `sync_ssh_keys` | The LDAP attribute containing a user's public SSH key. | no | `'sshPublicKey'` or false if not set |
### Set up LDAP user filter **(CORE ONLY)**
If you want to limit all GitLab access to a subset of the LDAP users on your
LDAP server, the first step should be to narrow the configured `base`. However,
it is sometimes necessary to filter users further. In this case, you can set up
an LDAP user filter. The filter must comply with
[RFC 4515](https://tools.ietf.org/search/rfc4515).
**Omnibus configuration**
```ruby
gitlab_rails['ldap_servers'] = {
'main' => {
# snip...
'user_filter' => '(employeeType=developer)'
}
}
```
**Source configuration**
```yaml
production:
ldap:
servers:
main:
# snip...
user_filter: '(employeeType=developer)'
```
If you want to limit access to the nested members of an Active Directory
group, you can use the following syntax:
```plaintext
(memberOf:1.2.840.113556.1.4.1941:=CN=My Group,DC=Example,DC=com)
```
For more information about this "LDAP_MATCHING_RULE_IN_CHAIN" filter, see the following
[Microsoft Search Filter Syntax](https://docs.microsoft.com/en-us/windows/win32/adsi/search-filter-syntax) document.
Support for nested members in the user filter should not be confused with
[group sync nested groups support](#supported-ldap-group-typesattributes). **(STARTER ONLY)**
Please note that GitLab does not support the custom filter syntax used by
OmniAuth LDAP.
#### Escaping special characters **(CORE ONLY)**
The `user_filter` DN can contain special characters. For example:
- A comma:
```plaintext
OU=GitLab, Inc,DC=gitlab,DC=com
```
- Open and close brackets:
```plaintext
OU=Gitlab (Inc),DC=gitlab,DC=com
```
These characters must be escaped as documented in
[RFC 4515](https://tools.ietf.org/search/rfc4515).
- Escape commas with `\2C`. For example:
```plaintext
OU=GitLab\2C Inc,DC=gitlab,DC=com
```
- Escape open and close brackets with `\28` and `\29`, respectively. For example:
```plaintext
OU=Gitlab \28Inc\29,DC=gitlab,DC=com
```
### Enabling LDAP username lowercase **(CORE ONLY)**
Some LDAP servers, depending on their configurations, can return uppercase usernames.
This can lead to several confusing issues such as creating links or namespaces with uppercase names.
GitLab can automatically lowercase usernames provided by the LDAP server by enabling
the configuration option `lowercase_usernames`. By default, this configuration option is `false`.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = {
'main' => {
# snip...
'lowercase_usernames' => true
}
}
```
1. [Reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
servers:
main:
# snip...
lowercase_usernames: true
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
### Disable LDAP web sign in **(CORE ONLY)**
It can be useful to prevent using LDAP credentials through the web UI when
an alternative such as SAML is preferred. This allows LDAP to be used for group
sync, while also allowing your SAML identity provider to handle additional
checks like custom 2FA.
When LDAP web sign in is disabled, users will not see a **LDAP** tab on the sign in page.
This does not disable [using LDAP credentials for Git access](#git-password-authentication-core-only).
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['prevent_ldap_sign_in'] = true
```
1. [Reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
prevent_ldap_sign_in: true
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Encryption **(CORE ONLY)**
### TLS Server Authentication
There are two encryption methods, `simple_tls` and `start_tls`.
For either encryption method, if setting `verify_certificates: false`, TLS
encryption is established with the LDAP server before any LDAP-protocol data is
exchanged but no validation of the LDAP server's SSL certificate is performed.
### Limitations
#### TLS Client Authentication
Not implemented by `Net::LDAP`.
You should disable anonymous LDAP authentication and enable simple or SASL
authentication. The TLS client authentication setting in your LDAP server cannot
be mandatory and clients cannot be authenticated with the TLS protocol.
## Multiple LDAP servers **(STARTER ONLY)**
With GitLab Enterprise Edition Starter, you can configure multiple LDAP servers
that your GitLab instance will connect to.
To add another LDAP server:
1. Duplicate the settings under [the main configuration](#configuration-core-only).
1. Edit them to match the additional LDAP server.
Be sure to choose a different provider ID made of letters a-z and numbers 0-9.
This ID will be stored in the database so that GitLab can remember which LDAP
server a user belongs to.
![Multiple LDAP Servers Login](img/multi_login.gif)
Based on the example illustrated on the image above,
our `gitlab.rb` configuration would look like:
```ruby
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = {
'main' => {
'label' => 'GitLab AD',
'host' => 'ad.example.org',
'port' => 636,
...
},
'secondary' => {
'label' => 'GitLab Secondary AD',
'host' => 'ad-secondary.example.net',
'port' => 636,
...
}
}
```
## User sync **(STARTER ONLY)**
Once per day, GitLab runs a worker to check and update GitLab
users against LDAP.
The process executes the following access checks:
- Ensure the user is still present in LDAP.
- If the LDAP server is Active Directory, ensure the user is active (not
blocked/disabled state). This will only be checked if
`active_directory: true` is set in the LDAP configuration.
NOTE: **Note:**
In Active Directory, a user is marked as disabled/blocked if the user
account control attribute (`userAccountControl:1.2.840.113556.1.4.803`)
has bit 2 set. See <https://ctovswild.com/2009/09/03/bitmask-searches-in-ldap/>
for more information.
The user will be set to `ldap_blocked` state in GitLab if the above conditions
fail. This means the user will not be able to login or push/pull code.
The process will also update the following user information:
- Email address.
- If `sync_ssh_keys` is set, SSH public keys.
- If Kerberos is enabled, Kerberos identity.
NOTE: **Note:**
The LDAP sync process updates existing users while new users are created on first sign in.
### Adjusting LDAP user sync schedule **(STARTER ONLY)**
NOTE: **Note:**
These are cron formatted values. You can use a crontab generator to create
these values, for example <http://www.crontabgenerator.com/>.
By default, GitLab will run a worker once per day at 01:30 a.m. server time to
check and update GitLab users against LDAP.
You can manually configure LDAP user sync times by setting the
following configuration values. The example below shows how to set LDAP user
sync to run once every 12 hours at the top of the hour.
**Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_sync_worker_cron'] = "0 */12 * * *"
```
1. [Reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source installations**
1. Edit `config/gitlab.yaml`:
```yaml
cron_jobs:
ldap_sync_worker_cron:
"0 */12 * * *"
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
## Group Sync **(STARTER ONLY)**
If your LDAP supports the `memberof` property, when the user signs in for the
first time GitLab will trigger a sync for groups the user should be a member of.
That way they don't need to wait for the hourly sync to be granted
access to their groups and projects.
A group sync process will run every hour on the hour, and `group_base` must be set
in LDAP configuration for LDAP synchronizations based on group CN to work. This allows
GitLab group membership to be automatically updated based on LDAP group members.
The `group_base` configuration should be a base LDAP 'container', such as an
'organization' or 'organizational unit', that contains LDAP groups that should
be available to GitLab. For example, `group_base` could be
`ou=groups,dc=example,dc=com`. In the config file it will look like the
following.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = {
'main' => {
# snip...
'group_base' => 'ou=groups,dc=example,dc=com',
}
}
```
1. [Apply your changes to GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `/home/git/gitlab/config/gitlab.yml`:
```yaml
production:
ldap:
servers:
main:
# snip...
group_base: ou=groups,dc=example,dc=com
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
To take advantage of group sync, group owners or maintainers will need to [create one
or more LDAP group links](#adding-group-links-starter-only).
### Adding group links **(STARTER ONLY)**
For information on adding group links via CNs and filters, refer to [the GitLab groups documentation](../../../user/group/index.md#manage-group-memberships-via-ldap).
### Administrator sync **(STARTER ONLY)**
As an extension of group sync, you can automatically manage your global GitLab
administrators. Specify a group CN for `admin_group` and all members of the
LDAP group will be given administrator privileges. The configuration will look
like the following.
NOTE: **Note:**
Administrators will not be synced unless `group_base` is also
specified alongside `admin_group`. Also, only specify the CN of the admin
group, as opposed to the full DN.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = {
'main' => {
# snip...
'group_base' => 'ou=groups,dc=example,dc=com',
'admin_group' => 'my_admin_group',
}
}
```
1. [Apply your changes to GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `/home/git/gitlab/config/gitlab.yml`:
```yaml
production:
ldap:
servers:
main:
# snip...
group_base: ou=groups,dc=example,dc=com
admin_group: my_admin_group
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
### Global group memberships lock **(STARTER ONLY)**
"Lock memberships to LDAP synchronization" setting allows instance administrators
to lock down user abilities to invite new members to a group.
When enabled, the following applies:
- Only administrator can manage memberships of any group including access levels.
- Users are not allowed to share project with other groups or invite members to
a project created in a group.
### Adjusting LDAP group sync schedule **(STARTER ONLY)**
NOTE: **Note:**
These are cron formatted values. You can use a crontab generator to create
these values, for example <http://www.crontabgenerator.com/>.
By default, GitLab runs a group sync process every hour, on the hour.
CAUTION: **Important:**
It's recommended that you do not start the sync process too frequently as this
could lead to multiple syncs running concurrently. This is primarily a concern
for installations with a large number of LDAP users. Please review the
[LDAP group sync benchmark metrics](#benchmarks) to see how
your installation compares before proceeding.
You can manually configure LDAP group sync times by setting the
following configuration values. The example below shows how to set group
sync to run once every 2 hours at the top of the hour.
**Omnibus installations**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_group_sync_worker_cron'] = "0 */2 * * * *"
```
1. [Reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
**Source installations**
1. Edit `config/gitlab.yaml`:
```yaml
cron_jobs:
ldap_group_sync_worker_cron:
"*/30 * * * *"
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
### External groups **(STARTER ONLY)**
Using the `external_groups` setting will allow you to mark all users belonging
to these groups as [external users](../../../user/permissions.md#external-users-core-only).
Group membership is checked periodically through the `LdapGroupSync` background
task.
**Omnibus configuration**
1. Edit `/etc/gitlab/gitlab.rb`:
```ruby
gitlab_rails['ldap_servers'] = {
'main' => {
# snip...
'external_groups' => ['interns', 'contractors'],
}
}
```
1. [Apply your changes to GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure).
**Source configuration**
1. Edit `config/gitlab.yaml`:
```yaml
production:
ldap:
servers:
main:
# snip...
external_groups: ['interns', 'contractors']
```
1. [Restart GitLab](../../restart_gitlab.md#installations-from-source) for the changes to take effect.
### Group sync technical details
There is a lot going on with group sync 'under the hood'. This section
outlines what LDAP queries are executed and what behavior you can expect
from group sync.
Group member access will be downgraded from a higher level if their LDAP group
membership changes. For example, if a user has 'Owner' rights in a group and the
next group sync reveals they should only have 'Developer' privileges, their
access will be adjusted accordingly. The only exception is if the user is the
*last* owner in a group. Groups need at least one owner to fulfill
administrative duties.
#### Supported LDAP group types/attributes
GitLab supports LDAP groups that use member attributes:
- `member`
- `submember`
- `uniquemember`
- `memberof`
- `memberuid`.
This means group sync supports, at least, LDAP groups with the following object classes:
`groupOfNames`, `posixGroup`, and `groupOfUniqueNames`.
Other object classes should work fine as long as members
are defined as one of the mentioned attributes. This also means GitLab supports
Microsoft Active Directory, Apple Open Directory, Open LDAP, and 389 Server.
Other LDAP servers should work, too.
Active Directory also supports nested groups. Group sync will recursively
resolve membership if `active_directory: true` is set in the configuration file.
NOTE: **Note:**
Nested group memberships are resolved only if the nested group
is found within the configured `group_base`. For example, if GitLab sees a
nested group with DN `cn=nested_group,ou=special_groups,dc=example,dc=com` but
the configured `group_base` is `ou=groups,dc=example,dc=com`, `cn=nested_group`
is ignored.
#### Queries
- Each LDAP group is queried a maximum of one time with base `group_base` and
filter `(cn=<cn_from_group_link>)`.
- If the LDAP group has the `memberuid` attribute, GitLab will execute another
LDAP query per member to obtain each user's full DN. These queries are
executed with base `base`, scope 'base object', and a filter depending on
whether `user_filter` is set. Filter may be `(uid=<uid_from_group>)` or a
joining of `user_filter`.
#### Benchmarks
Group sync was written to be as performant as possible. Data is cached, database
queries are optimized, and LDAP queries are minimized. The last benchmark run
revealed the following metrics:
For 20000 LDAP users, 11000 LDAP groups and 1000 GitLab groups with 10
LDAP group links each:
- Initial sync (no existing members assigned in GitLab) took 1.8 hours
- Subsequent syncs (checking membership, no writes) took 15 minutes
These metrics are meant to provide a baseline and performance may vary based on
any number of factors. This was a pretty extreme benchmark and most instances will
not have near this many users or groups. Disk speed, database performance,
network and LDAP server response time will affect these metrics.
## Troubleshooting
Please see our [administrator guide to troubleshooting LDAP](ldap-troubleshooting.md).
doc/administration/auth/ldap/ldap-troubleshooting.md 0 → 100644
View file @ fd8f47d7
# LDAP Troubleshooting for Administrators
## Common Problems & Workflows
### Connection
#### Connection refused
If you are getting `Connection Refused` errors when trying to connect to the
LDAP server please double-check the LDAP `port` and `encryption` settings used by
GitLab. Common combinations are `encryption: 'plain'` and `port: 389`, OR
`encryption: 'simple_tls'` and `port: 636`.
#### Connection times out
If GitLab cannot reach your LDAP endpoint, you will see a message like this:
```plaintext
Could not authenticate you from Ldapmain because "Connection timed out - user specified timeout".
```
If your configured LDAP provider and/or endpoint is offline or otherwise
unreachable by GitLab, no LDAP user will be able to authenticate and log in.
GitLab does not cache or store credentials for LDAP users to provide authentication
during an LDAP outage.
Contact your LDAP provider or administrator if you are seeing this error.
#### Referral error
If you see `LDAP search error: Referral` in the logs, or when troubleshooting
LDAP Group Sync, this error may indicate a configuration problem. The LDAP
configuration `/etc/gitlab/gitlab.rb` (Omnibus) or `config/gitlab.yml` (source)
is in YAML format and is sensitive to indentation. Check that `group_base` and
`admin_group` configuration keys are indented 2 spaces past the server
identifier. The default identifier is `main` and an example snippet looks like
the following:
```yaml
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'LDAP'
host: 'ldap.example.com'
...
group_base: 'cn=my_group,ou=groups,dc=example,dc=com'
admin_group: 'my_admin_group'
```
#### Query LDAP **(STARTER ONLY)**
The following allows you to perform a search in LDAP using the rails console.
Depending on what you're trying to do, it may make more sense to query [a
user](#query-a-user-in-ldap) or [a group](#query-a-group-in-ldap-starter-only) directly, or
even [use `ldapsearch`](#ldapsearch) instead.
```ruby
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain')
options = {
# :base is required
# use .base or .group_base
base: adapter.config.group_base,
# :filter is optional
# 'cn' looks for all "cn"s under :base
# '*' is the search string - here, it's a wildcard
filter: Net::Ldap::Filter.eq('cn', '*'),
# :attributes is optional
# the attributes we want to get returned
attributes: %w(dn cn memberuid member submember uniquemember memberof)
}
adapter.ldap_search(options)
```
For examples of how this is run,
[review the `Adapter` module](https://gitlab.com/gitlab-org/gitlab/blob/master/ee/lib/ee/gitlab/auth/ldap/adapter.rb).
### User logins
#### No users are found
If [you've confirmed](#ldap-check) that a connection to LDAP can be
established but GitLab doesn't show you LDAP users in the output, one of the
following is most likely true:
- The `bind_dn` user doesn't have enough permissions to traverse the user tree.
- The user(s) don't fall under the [configured `base`](index.md#configuration-core-only).
- The [configured `user_filter`](index.md#set-up-ldap-user-filter-core-only) blocks access to the user(s).
In this case, you con confirm which of the above is true using
[ldapsearch](#ldapsearch) with the existing LDAP configuration in your
`/etc/gitlab/gitlab.rb`.
#### User(s) cannot login
A user can have trouble logging in for any number of reasons. To get started,
here are some questions to ask yourself:
- Does the user fall under the [configured `base`](index.md#configuration-core-only) in
LDAP? The user must fall under this `base` to login.
- Does the user pass through the [configured `user_filter`](index.md#set-up-ldap-user-filter-core-only)?
If one is not configured, this question can be ignored. If it is, then the
user must also pass through this filter to be allowed to login.
- Refer to our docs on [debugging the `user_filter`](#debug-ldap-user-filter).
If the above are both okay, the next place to look for the problem is
the logs themselves while reproducing the issue.
- Ask the user to login and let it fail.
- [Look through the output](#gitlab-logs) for any errors or other
messages about the login. You may see one of the other error messages on
this page, in which case that section can help resolve the issue.
If the logs don't lead to the root of the problem, use the
[rails console](#rails-console) to [query this user](#query-a-user-in-ldap)
to see if GitLab can read this user on the LDAP server.
It can also be helpful to
[debug a user sync](#sync-all-users-starter-only) to
investigate further.
#### Invalid credentials on login
If that the login credentials used are accurate on LDAP, ensure the following
are true for the user in question:
- Make sure the user you are binding with has enough permissions to read the user's
tree and traverse it.
- Check that the `user_filter` is not blocking otherwise valid users.
- Run [an LDAP check command](#ldap-check) to make sure that the LDAP settings
are correct and [GitLab can see your users](#no-users-are-found).
#### Email has already been taken
A user tries to login with the correct LDAP credentials, is denied access,
and the [production.log](../../logs.md#productionlog) shows an error that looks like this:
```plaintext
(LDAP) Error saving user <USER DN> (email@example.com): ["Email has already been taken"]
```
This error is referring to the email address in LDAP, `email@example.com`. Email
addresses must be unique in GitLab and LDAP links to a user's primary email (as opposed
to any of their possibly-numerous secondary emails). Another user (or even the
same user) has the email `email@example.com` set as a secondary email, which
is throwing this error.
We can check where this conflicting email address is coming from using the
[rails console](#rails-console). Once in the console, run the following:
```ruby
# This searches for an email among the primary AND secondary emails
user = User.find_by_any_email('email@example.com')
user.username
```
This will show you which user has this email address. One of two steps will
have to be taken here:
- To create a new GitLab user/username for this user when logging in with LDAP,
remove the secondary email to remove the conflict.
- To use an existing GitLab user/username for this user to use with LDAP,
remove this email as a secondary email and make it a primary one so GitLab
will associate this profile to the LDAP identity.
The user can do either of these steps [in their
profile](../../../user/profile/index.md#user-profile) or an admin can do it.
#### Debug LDAP user filter
[`ldapsearch`](#ldapsearch) allows you to test your configured
[user filter](index.md#set-up-ldap-user-filter-core-only)
to confirm that it returns the users you expect it to return.
```shell
ldapsearch -H ldaps://$host:$port -D "$bind_dn" -y bind_dn_password.txt -b "$base" "$user_filter" sAMAccountName
```
- Variables beginning with a `$` refer to a variable from the LDAP section of
your configuration file.
- Replace `ldaps://` with `ldap://` if you are using the plain authentication method.
Port `389` is the default `ldap://` port and `636` is the default `ldaps://`
port.
- We are assuming the password for the `bind_dn` user is in `bind_dn_password.txt`.
#### Sync all users **(STARTER ONLY)**
The output from a manual [user sync](index.md#user-sync-starter-only) can show you what happens when
GitLab tries to sync its users against LDAP. Enter the [rails console](#rails-console)
and then run:
```ruby
Rails.logger.level = Logger::DEBUG
LdapSyncWorker.new.perform
```
Next, [learn how to read the
output](#example-console-output-after-a-user-sync-starter-only).
##### Example console output after a user sync **(STARTER ONLY)**
The output from a [manual user sync](#sync-all-users-starter-only) will be very verbose, and a
single user's successful sync can look like this:
```shell
Syncing user John, email@example.com
Identity Load (0.9ms) SELECT "identities".* FROM "identities" WHERE "identities"."user_id" = 20 AND (provider LIKE 'ldap%') LIMIT 1
Instantiating Gitlab::Auth::Ldap::Person with LDIF:
dn: cn=John Smith,ou=people,dc=example,dc=com
cn: John Smith
mail: email@example.com
memberof: cn=admin_staff,ou=people,dc=example,dc=com
uid: John
UserSyncedAttributesMetadata Load (0.9ms) SELECT "user_synced_attributes_metadata".* FROM "user_synced_attributes_metadata" WHERE "user_synced_attributes_metadata"."user_id" = 20 LIMIT 1
(0.3ms) BEGIN
Namespace Load (1.0ms) SELECT "namespaces".* FROM "namespaces" WHERE "namespaces"."owner_id" = 20 AND "namespaces"."type" IS NULL LIMIT 1
Route Load (0.8ms) SELECT "routes".* FROM "routes" WHERE "routes"."source_id" = 27 AND "routes"."source_type" = 'Namespace' LIMIT 1
Ci::Runner Load (1.1ms) SELECT "ci_runners".* FROM "ci_runners" INNER JOIN "ci_runner_namespaces" ON "ci_runners"."id" = "ci_runner_namespaces"."runner_id" WHERE "ci_runner_namespaces"."namespace_id" = 27
(0.7ms) COMMIT
(0.4ms) BEGIN
Route Load (0.8ms) SELECT "routes".* FROM "routes" WHERE (LOWER("routes"."path") = LOWER('John'))
Namespace Load (1.0ms) SELECT "namespaces".* FROM "namespaces" WHERE "namespaces"."id" = 27 LIMIT 1
Route Exists (0.9ms) SELECT 1 AS one FROM "routes" WHERE LOWER("routes"."path") = LOWER('John') AND "routes"."id" != 50 LIMIT 1
User Update (1.1ms) UPDATE "users" SET "updated_at" = '2019-10-17 14:40:59.751685', "last_credential_check_at" = '2019-10-17 14:40:59.738714' WHERE "users"."id" = 20
```
There's a lot here, so let's go over what could be helpful when debugging.
First, GitLab will look for all users that have previously
logged in with LDAP and iterate on them. Each user's sync will start with
the following line that contains the user's username and email, as they
exist in GitLab now:
```shell
Syncing user John, email@example.com
```
If you don't find a particular user's GitLab email in the output, then that
user hasn't logged in with LDAP yet.
Next, GitLab searches its `identities` table for the existing
link between this user and the configured LDAP provider(s):
```sql
Identity Load (0.9ms) SELECT "identities".* FROM "identities" WHERE "identities"."user_id" = 20 AND (provider LIKE 'ldap%') LIMIT 1
```
The identity object will have the DN that GitLab will use to look for the user
in LDAP. If the DN isn't found, the email is used instead. We can see that
this user is found in LDAP:
```shell
Instantiating Gitlab::Auth::Ldap::Person with LDIF:
dn: cn=John Smith,ou=people,dc=example,dc=com
cn: John Smith
mail: email@example.com
memberof: cn=admin_staff,ou=people,dc=example,dc=com
uid: John
```
If the user wasn't found in LDAP with either the DN or email, you may see the
following message instead:
```shell
LDAP search error: No Such Object
```
...in which case the user will be blocked:
```shell
User Update (0.4ms) UPDATE "users" SET "state" = $1, "updated_at" = $2 WHERE "users"."id" = $3 [["state", "ldap_blocked"], ["updated_at", "2019-10-18 15:46:22.902177"], ["id", 20]]
```
Once the user is found in LDAP the rest of the output will update the GitLab
database with any changes.
#### Query a user in LDAP
This will test that GitLab can reach out to LDAP and read a particular user.
It can expose potential errors connecting to and/or querying LDAP
that may seem to fail silently in the GitLab UI.
```ruby
Rails.logger.level = Logger::DEBUG
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain') # If `main` is the LDAP provider
Gitlab::Auth::Ldap::Person.find_by_uid('<uid>', adapter)
```
### Group memberships **(STARTER ONLY)**
#### Membership(s) not granted **(STARTER ONLY)**
Sometimes you may think a particular user should be added to a GitLab group via
LDAP group sync, but for some reason it's not happening. There are several
things to check to debug the situation.
- Ensure LDAP configuration has a `group_base` specified.
[This configuration](index.md#group-sync-starter-only) is required for group sync to work properly.
- Ensure the correct [LDAP group link is added to the GitLab
group](index.md#adding-group-links-starter-only).
- Check that the user has an LDAP identity:
1. Sign in to GitLab as an administrator user.
1. Navigate to **Admin area -> Users**.
1. Search for the user
1. Open the user, by clicking on their name. Do not click 'Edit'.
1. Navigate to the **Identities** tab. There should be an LDAP identity with
an LDAP DN as the 'Identifier'. If not, this user hasn't logged in with
LDAP yet and must do so first.
- You've waited an hour or [the configured
interval](index.md#adjusting-ldap-group-sync-schedule-starter-only) for the group to
sync. To speed up the process, either go to the GitLab group **Settings ->
Members** and press **Sync now** (sync one group) or [run the group sync Rake
task](../../raketasks/ldap.md#run-a-group-sync-starter-only) (sync all groups).
If all of the above looks good, jump in to a little more advanced debugging in
the rails console.
1. Enter the [rails console](#rails-console).
1. Choose a GitLab group to test with. This group should have an LDAP group link
already configured.
1. [Enable debug logging, find the above GitLab group, and sync it with LDAP](#sync-one-group-starter-only).
1. Look through the output of the sync. See [example log
output](#example-console-output-after-a-group-sync-starter-only)
for how to read the output.
1. If you still aren't able to see why the user isn't being added, [query the
LDAP group directly](#query-a-group-in-ldap-starter-only) to see what members are listed.
1. Is the user's DN or UID in one of the lists from the above output? One of the DNs or
UIDs here should match the 'Identifier' from the LDAP identity checked earlier. If it doesn't,
the user does not appear to be in the LDAP group.
#### Admin privileges not granted
When [Administrator sync](index.md#administrator-sync-starter-only) has been configured
but the configured users aren't granted the correct admin privileges, confirm
the following are true:
- A [`group_base` is also configured](index.md#group-sync-starter-only).
- The configured `admin_group` in the `gitlab.rb` is a CN, rather than a DN or an array.
- This CN falls under the scope of the configured `group_base`.
- The members of the `admin_group` have already logged into GitLab with their LDAP
credentials. GitLab will only grant this admin access to the users whose
accounts are already connected to LDAP.
If all the above are true and the users are still not getting access, [run a manual
group sync](#sync-all-groups-starter-only) in the rails console and [look through the
output](#example-console-output-after-a-group-sync-starter-only) to see what happens when
GitLab syncs the `admin_group`.
#### Sync all groups **(STARTER ONLY)**
NOTE: **NOTE:**
To sync all groups manually when debugging is unnecessary, [use the Rake
task](../../raketasks/ldap.md#run-a-group-sync-starter-only) instead.
The output from a manual [group sync](index.md#group-sync-starter-only) can show you what happens
when GitLab syncs its LDAP group memberships against LDAP.
```ruby
Rails.logger.level = Logger::DEBUG
LdapAllGroupsSyncWorker.new.perform
```
Next, [learn how to read the
output](#example-console-output-after-a-group-sync-starter-only).
##### Example console output after a group sync **(STARTER ONLY)**
Like the output from the user sync, the output from the [manual group
sync](#sync-all-groups-starter-only) will also be very verbose. However, it contains lots
of helpful information.
Indicates the point where syncing actually begins:
```shell
Started syncing 'ldapmain' provider for 'my_group' group
```
The following entry shows an array of all user DNs GitLab sees in the LDAP server.
Note that these are the users for a single LDAP group, not a GitLab group. If
you have multiple LDAP groups linked to this GitLab group, you will see multiple
log entries like this - one for each LDAP group. If you don't see an LDAP user
DN in this log entry, LDAP is not returning the user when we do the lookup.
Verify the user is actually in the LDAP group.
```shell
Members in 'ldap_group_1' LDAP group: ["uid=john0,ou=people,dc=example,dc=com",
"uid=mary0,ou=people,dc=example,dc=com", "uid=john1,ou=people,dc=example,dc=com",
"uid=mary1,ou=people,dc=example,dc=com", "uid=john2,ou=people,dc=example,dc=com",
"uid=mary2,ou=people,dc=example,dc=com", "uid=john3,ou=people,dc=example,dc=com",
"uid=mary3,ou=people,dc=example,dc=com", "uid=john4,ou=people,dc=example,dc=com",
"uid=mary4,ou=people,dc=example,dc=com"]
```
Shortly after each of the above entries, you will see a hash of resolved member
access levels. This hash represents all user DNs GitLab thinks should have
access to this group, and at which access level (role). This hash is additive,
and more DNs may be added, or existing entries modified, based on additional
LDAP group lookups. The very last occurrence of this entry should indicate
exactly which users GitLab believes should be added to the group.
NOTE: **Note:**
10 is 'Guest', 20 is 'Reporter', 30 is 'Developer', 40 is 'Maintainer'
and 50 is 'Owner'.
```shell
Resolved 'my_group' group member access: {"uid=john0,ou=people,dc=example,dc=com"=>30,
"uid=mary0,ou=people,dc=example,dc=com"=>30, "uid=john1,ou=people,dc=example,dc=com"=>30,
"uid=mary1,ou=people,dc=example,dc=com"=>30, "uid=john2,ou=people,dc=example,dc=com"=>30,
"uid=mary2,ou=people,dc=example,dc=com"=>30, "uid=john3,ou=people,dc=example,dc=com"=>30,
"uid=mary3,ou=people,dc=example,dc=com"=>30, "uid=john4,ou=people,dc=example,dc=com"=>30,
"uid=mary4,ou=people,dc=example,dc=com"=>30}
```
It's not uncommon to see warnings like the following. These indicate that GitLab
would have added the user to a group, but the user could not be found in GitLab.
Usually this is not a cause for concern.
If you think a particular user should already exist in GitLab, but you're seeing
this entry, it could be due to a mismatched DN stored in GitLab. See
[User DN and/or email have changed](#user-dn-orand-email-have-changed) to update the user's LDAP identity.
```shell
User with DN `uid=john0,ou=people,dc=example,dc=com` should have access
to 'my_group' group but there is no user in GitLab with that
identity. Membership will be updated once the user signs in for
the first time.
```
Finally, the following entry says syncing has finished for this group:
```shell
Finished syncing all providers for 'my_group' group
```
Once all the configured group links have been synchronized, GitLab will look
for any Administrators or External users to sync:
```shell
Syncing admin users for 'ldapmain' provider
```
The output will look similar to what happens with a single group, and then
this line will indicate the sync is finished:
```shell
Finished syncing admin users for 'ldapmain' provider
```
If [admin sync](index.md#administrator-sync-starter-only) is not configured, you'll see a message
stating as such:
```shell
No `admin_group` configured for 'ldapmain' provider. Skipping
```
#### Sync one group **(STARTER ONLY)**
[Syncing all groups](#sync-all-groups-starter-only) can produce a lot of noise in the output, which can be
distracting when you're only interested in troubleshooting the memberships of
a single GitLab group. In that case, here's how you can just sync this group
and see its debug output:
```ruby
Rails.logger.level = Logger::DEBUG
# Find the GitLab group.
# If the output is `nil`, the group could not be found.
# If a bunch of group attributes are in the output, your group was found successfully.
group = Group.find_by(name: 'my_gitlab_group')
# Sync this group against LDAP
EE::Gitlab::Auth::Ldap::Sync::Group.execute_all_providers(group)
```
The output will be similar to
[that you'd get from syncing all groups](#example-console-output-after-a-group-sync-starter-only).
#### Query a group in LDAP **(STARTER ONLY)**
When you'd like to confirm that GitLab can read a LDAP group and see all its members,
you can run the following:
```ruby
# Find the adapter and the group itself
adapter = Gitlab::Auth::Ldap::Adapter.new('ldapmain') # If `main` is the LDAP provider
ldap_group = EE::Gitlab::Auth::Ldap::Group.find_by_cn('group_cn_here', adapter)
# Find the members of the LDAP group
ldap_group.member_dns
ldap_group.member_uids
```
### User DN or/and email have changed
When an LDAP user is created in GitLab, their LDAP DN is stored for later reference.
If GitLab cannot find a user by their DN, it will fall back
to finding the user by their email. If the lookup is successful, GitLab will
update the stored DN to the new value so both values will now match what's in
LDAP.
If the email has changed and the DN has not, GitLab will find the user with
the DN and update its own record of the user's email to match the one in LDAP.
However, if the primary email _and_ the DN change in LDAP, then GitLab will
have no way of identifying the correct LDAP record of the user and, as a
result, the user will be blocked. To rectify this, the user's existing
profile will have to be updated with at least one of the new values (primary
email or DN) so the LDAP record can be found.
The following script will update the emails for all provided users so they
won't be blocked or unable to access their accounts.
>**NOTE**: The following script will require that any new accounts with the new
email address are removed first. This is because emails have to be unique in GitLab.
Go to the [rails console](#rails-console) and then run:
```ruby
# Each entry will have to include the old username and the new email
emails = {
'ORIGINAL_USERNAME' => 'NEW_EMAIL_ADDRESS',
...
}
emails.each do |username, email|
user = User.find_by_username(username)
user.email = email
user.skip_reconfirmation!
user.save!
end
```
You can then [run a UserSync](#sync-all-users-starter-only) **(STARTER ONLY)** to sync the latest DN
for each of these users.
## Debugging Tools
### LDAP check
The [Rake task to check LDAP](../../raketasks/ldap.md#check) is a valuable tool
to help determine whether GitLab can successfully establish a connection to
LDAP and can get so far as to even read users.
If a connection can't be established, it is likely either because of a problem
with your configuration or a firewall blocking the connection.
- Ensure you don't have a firewall blocking the
connection, and that the LDAP server is accessible to the GitLab host.
- Look for an error message in the Rake check output, which may lead to your LDAP configuration to
confirm that the configuration values (specifically `host`, `port`, `bind_dn`, and
`password`) are correct.
- Look for [errors](#connection) in [the logs](#gitlab-logs) to further debug connection failures.
If GitLab can successfully connect to LDAP but doesn't return any
users, [see what to do when no users are found](#no-users-are-found).
### GitLab logs
If a user account is blocked or unblocked due to the LDAP configuration, a
message will be [logged to `application.log`](../../logs.md#applicationlog).
If there is an unexpected error during an LDAP lookup (configuration error,
timeout), the login is rejected and a message will be [logged to
`production.log`](../../logs.md#productionlog).
### ldapsearch
`ldapsearch` is a utility that will allow you to query your LDAP server. You can
use it to test your LDAP settings and ensure that the settings you're using
will get you the results you expect.
When using `ldapsearch`, be sure to use the same settings you've already
specified in your `gitlab.rb` configuration so you can confirm what happens
when those exact settings are used.
Running this command on the GitLab host will also help confirm that there's no
obstruction between the GitLab host and LDAP.
For example, consider the following GitLab configuration:
```shell
gitlab_rails['ldap_servers'] = YAML.load <<-'EOS' # remember to close this block with 'EOS' below
main: # 'main' is the GitLab 'provider ID' of this LDAP server
label: 'LDAP'
host: '127.0.0.1'
port: 389
uid: 'uid'
encryption: 'plain'
bind_dn: 'cn=admin,dc=ldap-testing,dc=example,dc=com'
password: 'Password1'
active_directory: true
allow_username_or_email_login: false
block_auto_created_users: false
base: 'dc=ldap-testing,dc=example,dc=com'
user_filter: ''
attributes:
username: ['uid', 'userid', 'sAMAccountName']
email: ['mail', 'email', 'userPrincipalName']
name: 'cn'
first_name: 'givenName'
last_name: 'sn'
group_base: 'ou=groups,dc=ldap-testing,dc=example,dc=com'
admin_group: 'gitlab_admin'
EOS
```
You would run the following `ldapsearch` to find the `bind_dn` user:
```shell
ldapsearch -D "cn=admin,dc=ldap-testing,dc=example,dc=com" \
-w Password1 \
-p 389 \
-h 127.0.0.1 \
-b "dc=ldap-testing,dc=example,dc=com"
```
Note that the `bind_dn`, `password`, `port`, `host`, and `base` are all
identical to what's configured in the `gitlab.rb`.
Please see [the official
`ldapsearch` documentation](https://linux.die.net/man/1/ldapsearch) for more.
### Using **AdFind** (Windows)
You can use the [`AdFind`](https://social.technet.microsoft.com/wiki/contents/articles/7535.adfind-command-examples.aspx) utility (on Windows based systems) to test that your LDAP server is accessible and authentication is working correctly. This is a freeware utility built by [Joe Richards](http://www.joeware.net/freetools/tools/adfind/index.htm).
**Return all objects**
You can use the filter `objectclass=*` to return all directory objects.
```shell
adfind -h ad.example.org:636 -ssl -u "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" -up Password1 -b "OU=GitLab INT,DC=GitLab,DC=org" -f (objectClass=*)
```
**Return single object using filter**
You can also retrieve a single object by **specifying** the object name or full **DN**. In this example we specify the object name only `CN=Leroy Fox`.
```shell
adfind -h ad.example.org:636 -ssl -u "CN=GitLabSRV,CN=Users,DC=GitLab,DC=org" -up Password1 -b "OU=GitLab INT,DC=GitLab,DC=org" -f (&(objectcategory=person)(CN=Leroy Fox))”
```
### Rails console
CAUTION: **CAUTION:**
Please note that it is very easy to create, read, modify, and destroy data on the
rails console, so please be sure to run commands exactly as listed.
The rails console is a valuable tool to help debug LDAP problems. It allows you to
directly interact with the application by running commands and seeing how GitLab
responds to them.
Please refer to [this guide](../../troubleshooting/debug.md#starting-a-rails-console-session)
for instructions on how to use the rails console.
#### Enable debug output
This will provide debug output that will be useful to see
what GitLab is doing and with what. This value is not persisted, and will only
be enabled for this session in the rails console.
To enable debug output in the rails console, [enter the rails
console](#rails-console) and run:
```ruby
Rails.logger.level = Logger::DEBUG
```
doc/administration/compliance.md
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......@@ -12,8 +12,8 @@ GitLab’s [security features](../security/README.md) may also help you meet rel
|**[Email all users of a project, group, or entire server](../user/admin_area/settings/terms.md)**<br>An admin can email groups of users based on project or group membership, or email everyone using the GitLab instance. This is great for scheduled maintenance or upgrades.|Starter+||
|**[Omnibus package supports log forwarding](https://docs.gitlab.com/omnibus/settings/logs.html#udp-log-forwarding)**<br>Forward your logs to a central system.|Starter+||
|**[Lock project membership to group](../user/group/index.md#member-lock-starter)**<br>Group owners can prevent new members from being added to projects within a group.|Starter+|✓|
|**[LDAP group sync](auth/ldap-ee.md#group-sync)**<br>GitLab Enterprise Edition gives admins the ability to automatically sync groups and manage SSH keys, permissions, and authentication, so you can focus on building your product, not configuring your tools.|Starter+||
|**[LDAP group sync filters](auth/ldap-ee.md#group-sync)**<br>GitLab Enterprise Edition Premium gives more flexibility to synchronize with LDAP based on filters, meaning you can leverage LDAP attributes to map GitLab permissions.|Premium+||
|**[LDAP group sync](auth/ldap/index.md#group-sync-starter-only)**<br>GitLab Enterprise Edition gives admins the ability to automatically sync groups and manage SSH keys, permissions, and authentication, so you can focus on building your product, not configuring your tools.|Starter+||
|**[LDAP group sync filters](auth/ldap/index.md#group-sync-starter-only)**<br>GitLab Enterprise Edition Premium gives more flexibility to synchronize with LDAP based on filters, meaning you can leverage LDAP attributes to map GitLab permissions.|Premium+||
|**[Audit logs](audit_events.md)**<br>To maintain the integrity of your code, GitLab Enterprise Edition Premium gives admins the ability to view any modifications made within the GitLab server in an advanced audit log system, so you can control, analyze, and track every change.|Premium+||
|**[Auditor users](auditor_users.md)**<br>Auditor users are users who are given read-only access to all projects, groups, and other resources on the GitLab instance.|Premium+||
|**[Credentials inventory](../user/admin_area/credentials_inventory.md)**<br>With a credentials inventory, GitLab administrators can keep track of the credentials used by all of the users in their GitLab instance. |Ultimate||
......
doc/administration/geo/replication/index.md
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......@@ -191,7 +191,7 @@ If you installed GitLab using the Omnibus packages (highly recommended):
1. [Set up the database replication](database.md) (`primary (read-write) <-> secondary (read-only)` topology).
1. [Configure fast lookup of authorized SSH keys in the database](../../operations/fast_ssh_key_lookup.md). This step is required and needs to be done on **both** the **primary** and **secondary** nodes.
1. [Configure GitLab](configuration.md) to set the **primary** and **secondary** nodes.
1. Optional: [Configure a secondary LDAP server](../../auth/ldap.md) for the **secondary** node. See [notes on LDAP](#ldap).
1. Optional: [Configure a secondary LDAP server](../../auth/ldap/index.md) for the **secondary** node. See [notes on LDAP](#ldap).
1. [Follow the "Using a Geo Server" guide](using_a_geo_server.md).
## Post-installation documentation
......
doc/administration/index.md
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......@@ -109,7 +109,7 @@ Learn how to install, configure, update, and maintain your GitLab instance.
- [Sign-up restrictions](../user/admin_area/settings/sign_up_restrictions.md): block email addresses of specific domains, or whitelist only specific domains.
- [Access restrictions](../user/admin_area/settings/visibility_and_access_controls.md#enabled-git-access-protocols): Define which Git access protocols can be used to talk to GitLab (SSH, HTTP, HTTPS).
- [Authentication and Authorization](auth/README.md): Configure external authentication with LDAP, SAML, CAS, and additional providers.
- [Sync LDAP](auth/ldap-ee.md) **(STARTER ONLY)**
- [Sync LDAP](auth/ldap/index.md) **(STARTER ONLY)**
- [Kerberos authentication](../integration/kerberos.md) **(STARTER ONLY)**
- See also other [authentication](../topics/authentication/index.md#gitlab-administrators) topics (for example, enforcing 2FA).
- [Email users](../tools/email.md): Email GitLab users from within GitLab. **(STARTER ONLY)**
......
doc/administration/raketasks/ldap.md
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......@@ -32,13 +32,13 @@ rake gitlab:ldap:check[50]
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/14735) in [GitLab Starter](https://about.gitlab.com/pricing/) 12.2.
The following task will run a [group sync](../auth/ldap-ee.md#group-sync) immediately. This is valuable
The following task will run a [group sync](../auth/ldap/index.md#group-sync-starter-only) immediately. This is valuable
when you'd like to update all configured group memberships against LDAP without
waiting for the next scheduled group sync to be run.
NOTE: **NOTE:**
If you'd like to change the frequency at which a group sync is performed,
[adjust the cron schedule](../auth/ldap-ee.md#adjusting-ldap-group-sync-schedule)
[adjust the cron schedule](../auth/ldap/index.md#adjusting-ldap-group-sync-schedule-starter-only)
instead.
**Omnibus Installation**
......
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redirect_to: '../../administration/auth/ldap/index.md'
---
This document was moved to [another location](../../administration/auth/how_to_configure_ldap_gitlab_ce/index.md).
This document was moved to [another location](../../administration/auth/ldap/index.md).
doc/articles/how_to_configure_ldap_gitlab_ee/index.md
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---
redirect_to: '../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md'
redirect_to: '../../administration/auth/ldap/index.md'
---
This document was moved to [another location](../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md).
This document was moved to [another location](../../administration/auth/ldap/index.md).
doc/development/architecture.md
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......@@ -588,7 +588,7 @@ Sidekiq is a Ruby background job processor that pulls jobs from the Redis queue
#### LDAP Authentication
- Configuration:
- [Omnibus](../administration/auth/ldap.md)
- [Omnibus](../administration/auth/ldap/index.md)
- [Charts](https://docs.gitlab.com/charts/charts/globals.html#ldap)
- [Source](https://gitlab.com/gitlab-org/gitlab/blob/master/config/gitlab.yml.example)
- [GDK](https://gitlab.com/gitlab-org/gitlab-development-kit/blob/master/doc/howto/ldap.md)
......
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redirect_to: '../administration/auth/ldap.md'
redirect_to: '../administration/auth/ldap/index.md'
---
This document was moved to [another location](../administration/auth/ldap.md).
This document was moved to [another location](../administration/auth/ldap/index.md).
doc/integration/kerberos.md
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......@@ -98,12 +98,12 @@ successful.
## Linking Kerberos and LDAP accounts together
If your users log in with Kerberos, but you also have [LDAP integration](../administration/auth/ldap.md)
If your users log in with Kerberos, but you also have [LDAP integration](../administration/auth/ldap/index.md)
enabled, then your users will be automatically linked to their LDAP accounts on
first login. For this to work, some prerequisites must be met:
The Kerberos username must match the LDAP user's UID. You can choose which LDAP
attribute is used as the UID in GitLab's [LDAP configuration](../administration/auth/ldap.md#configuration)
attribute is used as the UID in GitLab's [LDAP configuration](../administration/auth/ldap/index.md#configuration-core-only)
but for Active Directory, this should be `sAMAccountName`.
The Kerberos realm must match the domain part of the LDAP user's Distinguished
......
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redirect_to: '../administration/auth/ldap/index.md'
---
This document was moved to [`administration/auth/ldap`](../administration/auth/ldap.md).
This document was moved to [`administration/auth/ldap`](../administration/auth/ldap/index.md).
doc/raketasks/README.md
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......@@ -15,6 +15,7 @@ GitLab Rake tasks are performed using:
The following are available Rake tasks:
<<<<<<< HEAD
| Tasks | Description |
|:----------------------------------------------------------------------------------------------------|:------------------------------------------------------------------------------------------|
| [Back up and restore](backup_restore.md) | Back up, restore, and migrate GitLab instances between servers. |
......@@ -39,3 +40,26 @@ The following are available Rake tasks:
| [Webhooks administration](web_hooks.md) | Maintain project Webhooks. |
| [X.509 signatures](x509_signatures.md) | Update X.509 commit signatures, useful if certificate store has changed. |
| [Migrate Snippets to Git](migrate_snippets.md) | Migrate GitLab Snippets to Git repositories and show migration status |
=======
| Tasks | Description |
|:-------------------------------------------------------------------------------------------|:------------------------------------------------------------------------------------------|
| [Back up and restore](backup_restore.md) | Back up, restore, and migrate GitLab instances between servers. |
| [Clean up](cleanup.md) | Clean up unneeded items GitLab instances. |
| [Development](../development/rake_tasks.md) | Tasks for GitLab contributors. |
| [Elasticsearch](../integration/elasticsearch.md#gitlab-elasticsearch-rake-tasks) | Maintain Elasticsearch in a GitLab instance. |
| [Enable namespaces](features.md) | Enable usernames and namespaces for user projects. |
| [General maintenance](../administration/raketasks/maintenance.md) | General maintenance and self-check tasks. |
| [Geo maintenance](../administration/raketasks/geo.md) **(PREMIUM ONLY)** | [Geo](../administration/geo/replication/index.md)-related maintenance. |
| [GitHub import](../administration/raketasks/github_import.md) | Retrieve and import repositories from GitHub. |
| [Import repositories](import.md) | Import bare repositories into your GitLab instance. |
| [Import large project exports](../development/import_project.md#importing-via-a-rake-task) | Import large GitLab [project exports](../user/project/settings/import_export.md). |
| [Integrity checks](../administration/raketasks/check.md) | Check the integrity of repositories, files, and LDAP. |
| [LDAP maintenance](../administration/raketasks/ldap.md) | [LDAP](../administration/auth/ldap/index.md)-related tasks. |
| [List repositories](list_repos.md) | List of all GitLab-managed Git repositories on disk. |
| [Project import/export](../administration/raketasks/project_import_export.md) | Prepare for [project exports and imports](../user/project/settings/import_export.md). |
| [Repository storage](../administration/raketasks/storage.md) | List and migrate existing projects and attachments from legacy storage to hashed storage. |
| [Uploads migrate](../administration/raketasks/uploads/migrate.md) | Migrate uploads between storage local and object storage. |
| [Uploads sanitize](../administration/raketasks/uploads/sanitize.md) | Remove EXIF data from images uploaded to earlier versions of GitLab. |
| [User management](user_management.md) | Perform user management tasks. |
| [Webhooks administration](web_hooks.md) | Maintain project Webhooks. |
>>>>>>> b281e051f7ccde856ea3ef5976141ec663ce70b7
doc/topics/authentication/index.md
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......@@ -16,12 +16,9 @@ This page gathers all the resources for the topic **Authentication** within GitL
## GitLab administrators
- [LDAP (Community Edition)](../../administration/auth/ldap.md)
- [LDAP (Enterprise Edition)](../../administration/auth/ldap-ee.md) **(STARTER)**
- [LDAP](../../administration/auth/ldap/index.md)
- [Enforce Two-factor Authentication (2FA)](../../security/two_factor_authentication.md#enforce-two-factor-authentication-2fa)
- **Articles:**
- [How to Configure LDAP with GitLab CE](../../administration/auth/how_to_configure_ldap_gitlab_ce/index.md)
- [How to Configure LDAP with GitLab EE](../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md) **(STARTER)**
- [Feature Highlight: LDAP Integration](https://about.gitlab.com/blog/2014/07/10/feature-highlight-ldap-sync/)
- [Debugging LDAP](https://about.gitlab.com/handbook/support/workflows/debugging_ldap.html)
- **Integrations:**
......
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......@@ -306,8 +306,50 @@ All the members of the 'Engineering' group will have been added to 'Frontend'.
## Manage group memberships via LDAP
In GitLab Enterprise Edition, it is possible to manage GitLab group memberships using LDAP groups.
See [the GitLab Enterprise Edition documentation](../../integration/ldap.md) for more information.
Group syncing allows LDAP groups to be mapped to GitLab groups. This provides more control over per-group user management. To configure group syncing edit the `group_base` **DN** (`'OU=Global Groups,OU=GitLab INT,DC=GitLab,DC=org'`). This **OU** contains all groups that will be associated with GitLab groups.
Group links can be created using either a CN or a filter. These group links are created on the **Group Settings -> LDAP Synchronization** page. After configuring the link, it may take over an hour for the users to sync with the GitLab group.
For more information on the administration of LDAP and group sync, refer to the [main LDAP documentation](../../administration/auth/ldap/index.md#group-sync-starter-only).
NOTE: **Note:**
If an LDAP user is a group member when LDAP Synchronization is added, and they are not part of the LDAP group, they will be removed from the group.
### Creating group links via CN **(STARTER ONLY)**
To create group links via CN:
1. Select the **LDAP Server** for the link.
1. Select `LDAP Group cn` as the **Sync method**.
1. In the **LDAP Group cn** text input box, begin typing the CN of the group. There will be a dropdown menu with matching CNs within the configured `group_base`. Select your CN from this list.
1. In the **LDAP Access** section, select the [permission level](../permissions.md) for users synced in this group.
1. Click the `Add Synchronization` button to save this group link.
![Creating group links via CN](img/ldap_sync_cn_v13_1.png)
### Creating group links via filter **(PREMIUM ONLY)**
To create group links via filter:
1. Select the **LDAP Server** for the link.
1. Select `LDAP user filter` as the **Sync method**.
1. Input your filter in the **LDAP User filter** box. Follow the [documentation on user filters](../../administration/auth/ldap/index.md#set-up-ldap-user-filter-core-only).
1. In the **LDAP Access** section, select the [permission level](../permissions.md) for users synced in this group.
1. Click the `Add Synchronization` button to save this group link.
![Creating group links via filter](img/ldap_sync_filter_v13_1.png)
### Overriding user permissions **(STARTER ONLY)**
Since GitLab [v8.15](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/822) LDAP user permissions can now be manually overridden by an admin user. To override a user's permissions:
1. Go to your group's **Members** page.
1. Select the pencil icon in the row for the user you are editing.
1. Select the orange `Change permissions` button.
![Setting manual permissions](img/manual_permissions_v13_1.png)
Now you will be able to edit the user's permissions from the **Members** page.
## Epics **(ULTIMATE)**
......
doc/user/group/saml_sso/index.md
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......@@ -373,8 +373,8 @@ To proceed with configuring Group SAML SSO instead, you'll need to enable the `g
Group SAML on a self-managed instance is limited when compared to the recommended
[instance-wide SAML](../../../integration/saml.md). The recommended solution allows you to take advantage of:
- [LDAP compatibility](../../../administration/auth/ldap.md).
- [LDAP group Sync](../../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md#group-sync).
- [LDAP compatibility](../../../administration/auth/ldap/index.md).
- [LDAP Group Sync](../index.md#manage-group-memberships-via-ldap)
- [Required groups](../../../integration/saml.md#required-groups-starter-only).
- [Admin groups](../../../integration/saml.md#admin-groups-starter-only).
- [Auditor groups](../../../integration/saml.md#auditor-groups-starter-only).
......
doc/user/permissions.md
View file @ fd8f47d7
......@@ -455,7 +455,7 @@ for details about the pipelines security model.
## LDAP users permissions
Since GitLab 8.15, LDAP user permissions can now be manually overridden by an admin user.
Read through the documentation on [LDAP users permissions](../administration/auth/how_to_configure_ldap_gitlab_ee/index.md) to learn more.
Read through the documentation on [LDAP users permissions](group/index.md#manage-group-memberships-via-ldap) to learn more.
## Project aliases
......
doc/user/profile/account/create_accounts.md
View file @ fd8f47d7
......@@ -32,5 +32,5 @@ You can also [create users through the API](../../../api/users.md) as an admin.
Users will be:
- Automatically created upon first login with the [LDAP integration](../../../administration/auth/ldap.md).
- Automatically created upon first login with the [LDAP integration](../../../administration/auth/ldap/index.md).
- Created when first logging in via an [OmniAuth provider](../../../integration/omniauth.md) if the `allow_single_sign_on` setting is present.
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