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Commit f86020fa authored by Fabian Zimmer's avatar Fabian Zimmer
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Moved database pages to setup folder 

Moved the pages into the setup folder and fixed the broken
links in the other pages. This brings us closer to a more
jobs to be done focused documentation.
parent d81fd9e9
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doc/administration/geo/disaster_recovery/bring_primary_back.md
View file @ f86020fa
......@@ -45,7 +45,7 @@ To bring the former **primary** node up to date:
all the writes to this node](planned_failover.md#prevent-updates-to-the-primary-node)
during this procedure.
1. [Setup database replication](../replication/database.md). Note that in this
1. [Setup database replication](../setup/database.md). Note that in this
case, **primary** node refers to the current **primary** node, and **secondary** node refers to the
former **primary** node.
......
doc/administration/geo/disaster_recovery/index.md
View file @ f86020fa
......@@ -375,7 +375,7 @@ and after that you also need two extra steps.
gitlab_rails['auto_migrate'] = false
```
(For more details about these settings you can read [Configure the primary server](../replication/database.md#step-1-configure-the-primary-server))
(For more details about these settings you can read [Configure the primary server](../setup/database.md#step-1-configure-the-primary-server))
1. Save the file and reconfigure GitLab for the database listen changes and
the replication slot changes to be applied.
......@@ -408,7 +408,7 @@ and after that you also need two extra steps.
### Step 2. Initiate the replication process
Now we need to make each **secondary** node listen to changes on the new **primary** node. To do that you need
to [initiate the replication process](../replication/database.md#step-3-initiate-the-replication-process) again but this time
to [initiate the replication process](../setup/database.md#step-3-initiate-the-replication-process) again but this time
for another **primary** node. All the old replication settings will be overwritten.
## Troubleshooting
......
doc/administration/geo/replication/external_database.md
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
redirect_to: '../setup/external_database.md'
---
# Geo with external PostgreSQL instances **(PREMIUM ONLY)**
This document is relevant if you are using a PostgreSQL instance that is *not
managed by Omnibus*. This includes cloud-managed instances like AWS RDS, or
manually installed and configured PostgreSQL instances.
NOTE: **Note:**
We strongly recommend running Omnibus-managed instances as they are actively
developed and tested. We aim to be compatible with most external
(not managed by Omnibus) databases but we do not guarantee compatibility.
## **Primary** node
1. SSH into a GitLab **primary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** ID for your node (arbitrary value):
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
### Configure the external database to be replicated
To set up an external database, you can either:
- Set up streaming replication yourself (for example, in AWS RDS).
- Perform the Omnibus configuration manually as follows.
#### Leverage your cloud provider's tools to replicate the primary database
Given you have a primary node set up on AWS EC2 that uses RDS.
You can now just create a read-only replica in a different region and the
replication process will be managed by AWS. Make sure you've set Network ACL, Subnet, and
Security Group according to your needs, so the secondary application node can access the database.
The following instructions detail how to create a read-only replica for common
cloud providers:
- Amazon RDS - [Creating a Read Replica](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html#USER_ReadRepl.Create)
- Azure Database for PostgreSQL - [Create and manage read replicas in Azure Database for PostgreSQL](https://docs.microsoft.com/en-us/azure/postgresql/howto-read-replicas-portal)
Once your read-only replica is set up, you can skip to [configure you secondary application node](#configure-secondary-application-nodes-to-use-the-external-read-replica).
#### Manually configure the primary database for replication
The [`geo_primary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
configures the **primary** node's database to be replicated by making changes to
`pg_hba.conf` and `postgresql.conf`. Make the following configuration changes
manually to your external database configuration and ensure that you restart PostgreSQL
afterwards for the changes to take effect:
```plaintext
##
## Geo Primary Role
## - pg_hba.conf
##
host all all <trusted primary IP>/32 md5
host replication gitlab_replicator <trusted primary IP>/32 md5
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
```
```plaintext
##
## Geo Primary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 50
max_replication_slots = 1 # number of secondary instances
hot_standby = on
```
## **Secondary** nodes
### Manually configure the replica database
Make the following configuration changes manually to your `pg_hba.conf` and `postgresql.conf`
of your external replica database and ensure that you restart PostgreSQL afterwards
for the changes to take effect:
```plaintext
##
## Geo Secondary Role
## - pg_hba.conf
##
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
host all all <trusted primary IP>/24 md5
```
```plaintext
##
## Geo Secondary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 10
hot_standby = on
```
### Configure **secondary** application nodes to use the external read-replica
With Omnibus, the
[`geo_secondary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
has three main functions:
1. Configure the replica database.
1. Configure the tracking database.
1. Enable the [Geo Log Cursor](../index.md#geo-log-cursor) (not covered in this section).
To configure the connection to the external read-replica database and enable Log Cursor:
1. SSH into a GitLab **secondary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add the following
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
# note this is shared between both databases,
# make sure you define the same password in both
gitlab_rails['db_password'] = '<your_password_here>'
gitlab_rails['db_username'] = 'gitlab'
gitlab_rails['db_host'] = '<database_read_replica_host>'
# Disable the bundled Omnibus PostgreSQL, since we are
# using an external PostgreSQL
postgresql['enable'] = false
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
### Configure the tracking database
**Secondary** nodes use a separate PostgreSQL installation as a tracking
database to keep track of replication status and automatically recover from
potential replication issues. Omnibus automatically configures a tracking database
when `roles ['geo_secondary_role']` is set.
If you want to run this database external to Omnibus, please follow the instructions below.
If you are using a cloud-managed service for the tracking database, you may need
to grant additional roles to your tracking database user (by default, this is
`gitlab_geo`):
- Amazon RDS requires the [`rds_superuser`](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html#Appendix.PostgreSQL.CommonDBATasks.Roles) role.
- Azure Database for PostgreSQL requires the [`azure_pg_admin`](https://docs.microsoft.com/en-us/azure/postgresql/howto-create-users#how-to-create-additional-admin-users-in-azure-database-for-postgresql) role.
If you have an external database ready to be used as the tracking database,
follow the instructions below to use it:
NOTE: **Note:**
If you want to use AWS RDS as a tracking database, make sure it has access to
the secondary database. Unfortunately, just assigning the same security group is not enough as
outbound rules do not apply to RDS PostgreSQL databases. Therefore, you need to explicitly add an inbound
rule to the read-replica's security group allowing any TCP traffic from
the tracking database on port 5432.
1. Ensure that your secondary node can communicate with your tracking database by
manually changing the `pg_hba.conf` that is associated with your tracking database.
Remember to restart PostgreSQL afterwards for the changes to take effect:
```plaintext
##
## Geo Tracking Database Role
## - pg_hba.conf
##
host all all <trusted tracking IP>/32 md5
host all all <trusted secondary IP>/32 md5
```
1. SSH into a GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` with the connection parameters and credentials for
the machine with the PostgreSQL instance:
```ruby
geo_secondary['db_username'] = 'gitlab_geo'
geo_secondary['db_password'] = '<your_password_here>'
geo_secondary['db_host'] = '<tracking_database_host>'
geo_secondary['db_port'] = <tracking_database_port> # change to the correct port
geo_postgresql['enable'] = false # don't use internal managed instance
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
1. Run the tracking database migrations:
```shell
gitlab-rake geo:db:create
gitlab-rake geo:db:migrate
```
This document was moved to [another location](../setup/external_database.md).
doc/administration/geo/replication/multiple_servers.md
View file @ f86020fa
......@@ -147,7 +147,7 @@ The following documentation assumes the database will be run on
a single node only. Multi-node PostgreSQL on **secondary** nodes is
[not currently supported](https://gitlab.com/groups/gitlab-org/-/epics/2536).
Configure the [**secondary** database](database.md) as a read-only replica of
Configure the [**secondary** database](../setup/database.md) as a read-only replica of
the **primary** database. Use the following as a guide.
1. Generate an MD5 hash of the desired password for the database user that the
......@@ -222,7 +222,7 @@ the **primary** database. Use the following as a guide.
After making these changes, [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) so the changes take effect.
If using an external PostgreSQL instance, refer also to
[Geo with external PostgreSQL instances](external_database.md).
[Geo with external PostgreSQL instances](../setup/external_database.md).
### Step 3: Configure the tracking database on the **secondary** node
......@@ -294,7 +294,7 @@ Configure the tracking database.
After making these changes, [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) so the changes take effect.
If using an external PostgreSQL instance, refer also to
[Geo with external PostgreSQL instances](external_database.md).
[Geo with external PostgreSQL instances](../setup/external_database.md).
### Step 4: Configure the frontend application servers on the **secondary** node
......
doc/administration/geo/replication/troubleshooting.md
View file @ f86020fa
......@@ -251,7 +251,7 @@ sudo gitlab-rake gitlab:geo:check
When performing a PostgreSQL major version (9 > 10) update this is expected. Follow:
- [initiate-the-replication-process](database.md#step-3-initiate-the-replication-process)
- [initiate-the-replication-process](../setup/database.md#step-3-initiate-the-replication-process)
## Fixing replication errors
......@@ -268,7 +268,7 @@ default to 1. You may need to increase this value if you have more
Be sure to restart PostgreSQL for this to take
effect. See the [PostgreSQL replication
setup](database.md#postgresql-replication) guide for more details.
setup](../setup/database.md#postgresql-replication) guide for more details.
### Message: `FATAL: could not start WAL streaming: ERROR: replication slot "geo_secondary_my_domain_com" does not exist`?
......@@ -276,11 +276,11 @@ This occurs when PostgreSQL does not have a replication slot for the
**secondary** node by that name.
You may want to rerun the [replication
process](database.md) on the **secondary** node .
process](../setup/database.md) on the **secondary** node .
### Message: "Command exceeded allowed execution time" when setting up replication?
This may happen while [initiating the replication process](database.md#step-3-initiate-the-replication-process) on the **secondary** node,
This may happen while [initiating the replication process](../setup/database.md#step-3-initiate-the-replication-process) on the **secondary** node,
and indicates that your initial dataset is too large to be replicated in the default timeout (30 minutes).
Re-run `gitlab-ctl replicate-geo-database`, but include a larger value for
......@@ -754,7 +754,7 @@ This error refers to a problem with the database replica on a **secondary** node
which Geo expects to have access to. It usually means, either:
- An unsupported replication method was used (for example, logical replication).
- The instructions to setup a [Geo database replication](database.md) were not followed correctly.
- The instructions to setup a [Geo database replication](../setup/database.md) were not followed correctly.
- Your database connection details are incorrect, that is you have specified the wrong
user in your `/etc/gitlab/gitlab.rb` file.
......@@ -774,7 +774,7 @@ The most common problems that prevent the database from replicating correctly ar
- Database replication slot is misconfigured.
- Database is not using a replication slot or another alternative and cannot catch-up because WAL files were purged.
Make sure you follow the [Geo database replication](database.md) instructions for supported configuration.
Make sure you follow the [Geo database replication](../setup/database.md) instructions for supported configuration.
### Geo database version (...) does not match latest migration (...)
......
doc/administration/geo/replication/version_specific_updates.md
View file @ f86020fa
......@@ -343,7 +343,7 @@ Support for TLS-secured PostgreSQL replication has been added. If you are
currently using PostgreSQL replication across the open internet without an
external means of securing the connection (e.g., a site-to-site VPN), then you
should immediately reconfigure your **primary** and **secondary** PostgreSQL instances
according to the [updated instructions](database.md).
according to the [updated instructions](../setup/database.md).
If you *are* securing the connections externally and wish to continue doing so,
ensure you include the new option `--sslmode=prefer` in future invocations of
......@@ -441,7 +441,7 @@ Omnibus is the following:
1. Check the steps about defining `postgresql['sql_user_password']`, `gitlab_rails['db_password']`.
1. Make sure `postgresql['max_replication_slots']` matches the number of **secondary** Geo nodes locations.
1. Install GitLab on the **secondary** server.
1. Re-run the [database replication process](database.md#step-3-initiate-the-replication-process).
1. Re-run the [database replication process](../setup/database.md#step-3-initiate-the-replication-process).
## Updating to GitLab 9.0
......
doc/administration/geo/setup/database.md 0 → 100644
View file @ f86020fa
This diff is collapsed.
doc/administration/geo/setup/external_database.md 0 → 100644
View file @ f86020fa
---
stage: Enablement
group: Geo
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
type: howto
---
# Geo with external PostgreSQL instances **(PREMIUM ONLY)**
This document is relevant if you are using a PostgreSQL instance that is *not
managed by Omnibus*. This includes cloud-managed instances like AWS RDS, or
manually installed and configured PostgreSQL instances.
NOTE: **Note:**
We strongly recommend running Omnibus-managed instances as they are actively
developed and tested. We aim to be compatible with most external
(not managed by Omnibus) databases but we do not guarantee compatibility.
## **Primary** node
1. SSH into a GitLab **primary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add a **unique** ID for your node (arbitrary value):
```ruby
# The unique identifier for the Geo node.
gitlab_rails['geo_node_name'] = '<node_name_here>'
```
1. Reconfigure the **primary** node for the change to take effect:
```shell
gitlab-ctl reconfigure
```
1. Execute the command below to define the node as **primary** node:
```shell
gitlab-ctl set-geo-primary-node
```
This command will use your defined `external_url` in `/etc/gitlab/gitlab.rb`.
### Configure the external database to be replicated
To set up an external database, you can either:
- Set up streaming replication yourself (for example, in AWS RDS).
- Perform the Omnibus configuration manually as follows.
#### Leverage your cloud provider's tools to replicate the primary database
Given you have a primary node set up on AWS EC2 that uses RDS.
You can now just create a read-only replica in a different region and the
replication process will be managed by AWS. Make sure you've set Network ACL, Subnet, and
Security Group according to your needs, so the secondary application node can access the database.
The following instructions detail how to create a read-only replica for common
cloud providers:
- Amazon RDS - [Creating a Read Replica](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html#USER_ReadRepl.Create)
- Azure Database for PostgreSQL - [Create and manage read replicas in Azure Database for PostgreSQL](https://docs.microsoft.com/en-us/azure/postgresql/howto-read-replicas-portal)
Once your read-only replica is set up, you can skip to [configure you secondary application node](#configure-secondary-application-nodes-to-use-the-external-read-replica).
#### Manually configure the primary database for replication
The [`geo_primary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
configures the **primary** node's database to be replicated by making changes to
`pg_hba.conf` and `postgresql.conf`. Make the following configuration changes
manually to your external database configuration and ensure that you restart PostgreSQL
afterwards for the changes to take effect:
```plaintext
##
## Geo Primary Role
## - pg_hba.conf
##
host all all <trusted primary IP>/32 md5
host replication gitlab_replicator <trusted primary IP>/32 md5
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
```
```plaintext
##
## Geo Primary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 50
max_replication_slots = 1 # number of secondary instances
hot_standby = on
```
## **Secondary** nodes
### Manually configure the replica database
Make the following configuration changes manually to your `pg_hba.conf` and `postgresql.conf`
of your external replica database and ensure that you restart PostgreSQL afterwards
for the changes to take effect:
```plaintext
##
## Geo Secondary Role
## - pg_hba.conf
##
host all all <trusted secondary IP>/32 md5
host replication gitlab_replicator <trusted secondary IP>/32 md5
host all all <trusted primary IP>/24 md5
```
```plaintext
##
## Geo Secondary Role
## - postgresql.conf
##
wal_level = hot_standby
max_wal_senders = 10
wal_keep_segments = 10
hot_standby = on
```
### Configure **secondary** application nodes to use the external read-replica
With Omnibus, the
[`geo_secondary_role`](https://docs.gitlab.com/omnibus/roles/#gitlab-geo-roles)
has three main functions:
1. Configure the replica database.
1. Configure the tracking database.
1. Enable the [Geo Log Cursor](../index.md#geo-log-cursor) (not covered in this section).
To configure the connection to the external read-replica database and enable Log Cursor:
1. SSH into a GitLab **secondary** application server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` and add the following
```ruby
##
## Geo Secondary role
## - configure dependent flags automatically to enable Geo
##
roles ['geo_secondary_role']
# note this is shared between both databases,
# make sure you define the same password in both
gitlab_rails['db_password'] = '<your_password_here>'
gitlab_rails['db_username'] = 'gitlab'
gitlab_rails['db_host'] = '<database_read_replica_host>'
# Disable the bundled Omnibus PostgreSQL, since we are
# using an external PostgreSQL
postgresql['enable'] = false
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
### Configure the tracking database
**Secondary** nodes use a separate PostgreSQL installation as a tracking
database to keep track of replication status and automatically recover from
potential replication issues. Omnibus automatically configures a tracking database
when `roles ['geo_secondary_role']` is set.
If you want to run this database external to Omnibus, please follow the instructions below.
If you are using a cloud-managed service for the tracking database, you may need
to grant additional roles to your tracking database user (by default, this is
`gitlab_geo`):
- Amazon RDS requires the [`rds_superuser`](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html#Appendix.PostgreSQL.CommonDBATasks.Roles) role.
- Azure Database for PostgreSQL requires the [`azure_pg_admin`](https://docs.microsoft.com/en-us/azure/postgresql/howto-create-users#how-to-create-additional-admin-users-in-azure-database-for-postgresql) role.
If you have an external database ready to be used as the tracking database,
follow the instructions below to use it:
NOTE: **Note:**
If you want to use AWS RDS as a tracking database, make sure it has access to
the secondary database. Unfortunately, just assigning the same security group is not enough as
outbound rules do not apply to RDS PostgreSQL databases. Therefore, you need to explicitly add an inbound
rule to the read-replica's security group allowing any TCP traffic from
the tracking database on port 5432.
1. Ensure that your secondary node can communicate with your tracking database by
manually changing the `pg_hba.conf` that is associated with your tracking database.
Remember to restart PostgreSQL afterwards for the changes to take effect:
```plaintext
##
## Geo Tracking Database Role
## - pg_hba.conf
##
host all all <trusted tracking IP>/32 md5
host all all <trusted secondary IP>/32 md5
```
1. SSH into a GitLab **secondary** server and login as root:
```shell
sudo -i
```
1. Edit `/etc/gitlab/gitlab.rb` with the connection parameters and credentials for
the machine with the PostgreSQL instance:
```ruby
geo_secondary['db_username'] = 'gitlab_geo'
geo_secondary['db_password'] = '<your_password_here>'
geo_secondary['db_host'] = '<tracking_database_host>'
geo_secondary['db_port'] = <tracking_database_port> # change to the correct port
geo_postgresql['enable'] = false # don't use internal managed instance
```
1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
1. Run the tracking database migrations:
```shell
gitlab-rake geo:db:create
gitlab-rake geo:db:migrate
```
doc/administration/geo/setup/index.md
View file @ f86020fa
......@@ -21,7 +21,7 @@ If you installed GitLab using the Omnibus packages (highly recommended):
1. [Install GitLab Enterprise Edition](https://about.gitlab.com/install/) on the server that will serve as the **secondary** node. Do not create an account or log in to the new **secondary** node.
1. [Upload the GitLab License](../../../user/admin_area/license.md) on the **primary** node to unlock Geo. The license must be for [GitLab Premium](https://about.gitlab.com/pricing/) or higher.
1. [Set up the database replication](../replication/database.md) (`primary (read-write) <-> secondary (read-only)` topology).
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](../replication/configuration.md) to set the **primary** and **secondary** nodes.
1. Optional: [Configure a secondary LDAP server](../../auth/ldap/index.md) for the **secondary** node. See [notes on LDAP](../index.md#ldap).
......
doc/administration/troubleshooting/postgresql.md
View file @ f86020fa
......@@ -34,7 +34,7 @@ This section is for links to information elsewhere in the GitLab documentation.
- [More about external PostgreSQL](../postgresql/external.md)
- [Running Geo with external PostgreSQL](../geo/replication/external_database.md)
- [Running Geo with external PostgreSQL](../geo/setup/external_database.md)
- [Upgrades when running PostgreSQL configured for HA.](https://docs.gitlab.com/omnibus/settings/database.html#upgrading-a-gitlab-ha-cluster)
......
doc/gitlab-geo/database.md
View file @ f86020fa
---
redirect_to: '../administration/geo/replication/database.md'
redirect_to: '../administration/geo/setup/database.md'
---
This document was moved to [another location](../administration/geo/replication/database.md).
This document was moved to [another location](../administration/geo/setup/database.md).
doc/gitlab-geo/database_source.md
View file @ f86020fa
---
redirect_to: '../administration/geo/replication/database.md'
redirect_to: '../administration/geo/setup/database.md'
---
This document was moved to [another location](../administration/geo/replication/database.md).
This document was moved to [another location](../administration/geo/setup/database.md).
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