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Commit 39809227 authored by Marin Jankovski's avatar Marin Jankovski
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Merge branch 'ci-migration-doc-improvements' into 'master' 

Ci migration doc improvements

Use export improvements in CI 8.0.1, make upgrades a more prominent part of the process, do not shut down GitLab during CI data import.

See merge request !1387
parents 0ce5fb71 d2ab95d1
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doc/migrate_ci_to_ce/README.md
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...@@ -5,232 +5,243 @@ Edition (EE), GitLab CI is no longer its own application, but is instead built ...@@ -5,232 +5,243 @@ Edition (EE), GitLab CI is no longer its own application, but is instead built
into the CE and EE applications. into the CE and EE applications.
This guide will detail the process of migrating your CI installation and data This guide will detail the process of migrating your CI installation and data
into your GitLab CE or EE installation. into your GitLab CE or EE installation. **You can only migrate CI data from
GitLab CI 8.0 to GitLab 8.0; migrating between other versions (e.g.7.14 to 8.1)
is not possible.**
### Before we begin We recommend that you read through the entire migration process in this
document before beginning.
**You need to have a working installation of GitLab CI version 8.0 to perform ### Overview
this migration. The older versions are not supported and will most likely break
this migration procedure.**
This migration cannot be performed online and takes a significant amount of In this document we assume you have a GitLab server and a GitLab CI server. It
time. Make sure to plan ahead. does not matter if these are the same machine.
If you are running a version of GitLab CI prior to 8.0 please follow the The migration consists of three parts: updating GitLab and GitLab CI, moving
appropriate [update guide](https://gitlab.com/gitlab-org/gitlab-ci/tree/master/doc/update/) data, and redirecting traffic.
before proceeding.
The migration is divided into four parts and covers both manual and Omnibus Please note that CI builds triggered on your GitLab server in the time between
installations: updating to 8.0 and finishing the migration will be lost. Your GitLab server
can be online for most of the procedure; the only GitLab downtime (if any) is
during the upgrade to 8.0. Your CI service will be offline from the moment you
upgrade to 8.0 until you finish the migration procedure.
1. [GitLab CI](#part-i-gitlab-ci) ### Before upgrading
1. [Gitlab CE (or EE)](#part-ii-gitlab-ce-or-ee)
1. [Nginx configuration](#part-iii-nginx-configuration)
1. [Finishing Up](#part-iv-finishing-up)
### Part I: GitLab CI #### 1. Verify that backups work
#### 1. Stop GitLab CI Make sure that the backup script on both servers can connect to the database.
# Manual installation ```
sudo service gitlab_ci stop # On your CI server:
# Omnibus
# Omnibus installation sudo gitlab-ci-rake backup:create
sudo gitlab-ctl stop ci-unicorn ci-sidekiq
#### 2. Create a backup
The migration procedure modifies the structure of the CI database. If something
goes wrong, you will not be able to revert to a previous version without a
backup.
If your GitLab CI installation uses **MySQL** and your GitLab CE (or EE)
installation uses **PostgreSQL** you'll need to convert the CI database by
setting a `MYSQL_TO_POSTGRESQL` flag.
If you use the Omnibus package you most likely use **PostgreSQL** on both GitLab
CE (or EE) and CI.
You can check which database each install is using by viewing their
database configuration files:
cat /home/gitlab_ci/gitlab-ci/config/database.yml
cat /home/git/gitlab/config/database.yml
- If both applications use the same database `adapter`, create the backup with
this command:
# Manual installation
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake backup:create RAILS_ENV=production
# Omnibus installation # Source
sudo gitlab-ci-rake backup:create cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake backup:create RAILS_ENV=production
```
- If CI uses MySQL, and CE (or EE) uses PostgreSQL, create the backup with this Also check on your GitLab server.
command (note the `MYSQL_TO_POSTGRESQL` flag):
# Manual installation ```
cd /home/gitlab_ci/gitlab-ci # On your GitLab server:
sudo -u gitlab_ci -H bundle exec rake backup:create RAILS_ENV=production MYSQL_TO_POSTGRESQL=1 # Omnibus
sudo gitlab-rake gitlab:backup:create SKIP=repositories,uploads
# Omnibus installation # Source
sudo gitlab-ci-rake backup:create MYSQL_TO_POSTGRESQL=1 cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production SKIP=repositories,uploads
```
#### 3. Remove cronjob If this fails you need to fix it before upgrading to 8.0. Also see
https://about.gitlab.com/getting-help/
**Note:** This step is only required for **manual installations**. Omnibus users #### 2. Check source and target database types
can [skip to the next step](#part-ii-gitlab-ce-or-ee).
# Manual installation Check what databases you use on your GitLab server and your CI server.
cd /home/gitlab_ci/gitlab-ci Look for the 'adapter:' line. If your CI server and your GitLab server use
sudo -u gitlab_ci -H bundle exec whenever --clear-crontab the same database adapter no special care is needed. If your CI server uses
MySQL and your GitLab server uses PostgreSQL you need to pass a special option
during the 'Moving data' part. **If your CI server uses PostgreSQL and your
GitLab server uses MySQL you cannot migrate your CI data to GitLab 8.0.**
### Part II: GitLab CE (or EE) ```
# On your CI server:
# Omnibus
sudo gitlab-ci-rake env:info
#### 1. Ensure GitLab is updated # Source
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake env:info RAILS_ENV=production
```
Your GitLab CE or EE installation **must be version 8.0**. If it's not, follow ```
the [update guide](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/update/7.14-to-8.0.md) # On your GitLab server:
before proceeding. # Omnibus
sudo gitlab-rake gitlab:env:info
If you use the Omnibus packages simply run `apt-get upgrade` to install the # Source
latest version. cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
```
#### 2. Prevent CI usage during the migration process #### 3. Storage planning
As an administrator, go to **Admin Area** -> **Settings**, and under **Continuous Decide where to store CI build traces on GitLab server. GitLab CI uses
Integration** uncheck **Disable to prevent CI usage until rake ci:migrate is run files on disk to store CI build traces. The default path for these build
(8.0 only)**. traces is `/var/opt/gitlab/gitlab-ci/builds` (Omnibus) or
`/home/git/gitlab/builds` (Source). If you are storing your repository data in
a special location, or if you are using NFS, you should make sure that you
store build traces on the same storage as your Git repositories.
This will disable the CI integration and prevent users from creating CI projects ### I. Upgrading
until the migration process is completed.
#### 3. Stop GitLab From this point on, GitLab CI will be unavailable for your end users.
Before you can migrate data you need to stop the GitLab service first: #### 1. Upgrade GitLab to 8.0
# Manual installation First upgrade your GitLab server to version 8.0:
sudo service gitlab stop https://about.gitlab.com/update/
# Omnibus installation #### 2. Disable CI on the GitLab server during the migration
sudo gitlab-ctl stop unicorn sidekiq
#### 4. Create a backup After you update, go to the admin panel and temporarily disable CI. As
an administrator, go to **Admin Area** -> **Settings**, and under
**Continuous Integration** uncheck **Disable to prevent CI usage until rake
ci:migrate is run (8.0 only)**.
This migration poses a **significant risk** of breaking your GitLab #### 3. CI settings are now in GitLab
installation. Create a backup before proceeding:
# Manual installation If you want to use custom CI settings (e.g. change where builds are
cd /home/git/gitlab stored), please update `/etc/gitlab/gitlab.rb` (Omnibus) or
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production `/home/git/gitlab/config/gitlab.yml` (Source).
# Omnibus installation #### 4. Upgrade GitLab CI to 8.0
sudo gitlab-rake gitlab:backup:create
It's possible to speed up backup creation by skipping repositories and uploads: Now upgrade GitLab CI to version 8.0. If you are using Omnibus packages,
this may have already happened when you upgraded GitLab to 8.0.
# Manual installation #### 5. Disable GitLab CI on the CI server
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production SKIP=repositories,uploads
# Omnibus installation Disable GitLab CI after upgrading to 8.0.
sudo gitlab-rake gitlab:backup:create SKIP=repositories,uploads
#### 5. Copy secret tokens from CI ```
# On your CI server:
# Omnibus
sudo gitlab-ctl stop ci-unicorn
sudo gitlab-ctl stop ci-sidekiq
# Source
sudo service gitlab_ci stop
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec whenever --clear-crontab
```
The `secrets.yml` file stores encryption keys for secure variables. ### II. Moving data
- **Manual installations** need to copy the contents of GitLab CI's #### 1. Database encryption key
`config/secrets.yml` file to the same file in GitLab CE:
```bash Move the database encryption key from your CI server to your GitLab
# Manual installation server. The command below will show you what you need to copy-paste to your
sudo cp /home/gitlab_ci/gitlab-ci/config/secrets.yml /home/git/gitlab/config/secrets.yml GitLab server. On Omnibus GitLab servers you will have to add a line to
sudo chown git:git /home/git/gitlab/config/secrets.yml `/etc/gitlab/gitlab.rb`. On GitLab servers installed from source you will have
sudo chown 0600 /home/git/gitlab/config/secrets.yml to replace the contents of `/home/git/gitlab/config/secrets.yml`.
```
- **Omnibus installations** where GitLab CI and CE (or EE) are on the same ```
server don't need to do anything further, because the secrets are stored in # On your CI server:
`/etc/gitlab/gitlab-secrets.json`. # Omnibus
sudo gitlab-ci-rake backup:show_secrets
- **Omnibus installations** where GitLab CI is on a different server than CE (or # Source
EE) will need to: cd /home/gitlab_ci/gitlab-ci
1. On the CI server, copy the `db_key_base` value from sudo -u gitlab_ci -H bundle exec rake backup:show_secrets RAILS_ENV=production
`/etc/gitlab/gitlab-secrets.json` ```
1. On the CE (or EE) server, add `gitlab_ci['db_key_base'] =
"VALUE_FROM_ABOVE"` to the `/etc/gitlab/gitlab.rb` file and run `sudo
gitlab-ctl reconfigure`
#### 6. New configuration options for `gitlab.yml` #### 2. SQL data and build traces
**Note:** This step is only required for **manual installations**. Omnibus users Create your final CI data export. If you are converting from MySQL to
can [skip to the next step](#7-copy-backup-from-gitlab-ci). PostgreSQL, add ` MYSQL_TO_POSTGRESQL=1` to the end of the rake command. When
the command finishes it will print the path to your data export archive; you
will need this file later.
There are new configuration options available for `gitlab.yml`. View them with ```
the command below and apply them manually to your current `gitlab.yml`: # On your CI server:
# Omnibus
sudo gitlab-ci-rake backup:create
git diff origin/7-14-stable:config/gitlab.yml.example origin/8-0-stable:config/gitlab.yml.example # Source
cd /home/git/gitlab
sudo -u git -H bundle exec rake backup:create RAILS_ENV=production
```
The new options include configuration settings for GitLab CI. #### 3. Copy data to the GitLab server
#### 7. Copy backup from GitLab CI If you were running GitLab and GitLab CI on the same server you can skip this
step.
```bash Copy your CI data archive to your GitLab server. There are many ways to do
# Manual installation this, below we use SSH agent forwarding and 'scp', which will be easy and fast
sudo cp -v /home/gitlab_ci/gitlab-ci/tmp/backups/*_gitlab_ci_backup.tar /home/git/gitlab/tmp/backups for most setups. You can also copy the data archive first from the CI server to
sudo chown git:git /home/git/gitlab/tmp/backups/*_gitlab_ci_backup.tar your laptop and then from your laptop to the GitLab server.
# Omnibus installation ```
sudo cp -v /var/opt/gitlab/ci-backups/*_gitlab_ci_backup.tar /var/opt/gitlab/backups/ # Start from your laptop
sudo chown git:git /var/opt/gitlab/backups/*_gitlab_ci_backup.tar ssh -A ci_admin@ci_server.example
# Now on the CI server
scp /path/to/12345_gitlab_ci_backup.tar gitlab_admin@gitlab_server.example:~
``` ```
If moving across the servers you can use `scp`. #### 4. Move data to the GitLab backups folder
However, this requires you to provide an authorized key or password to login to
the GitLab CE (or EE) server from the CI server. You can try to use ssh-agent
from your local machine to have that: login to your GitLab CI server using
`ssh -A`.
```bash Make the CI data archive discoverable for GitLab. We assume below that you
# Manual installation store backups in the default path, adjust the command if necessary.
scp /home/gitlab_ci/gitlab-ci/tmp/backups/*_gitlab_ci_backup.tar root@gitlab.example.com:/home/git/gitlab/tmp/backup
# Omnibus installation
scp /var/opt/gitlab/ci-backups/*_gitlab_ci_backup.tar root@gitlab.example.com:/var/opt/gitlab/backups/
``` ```
# On your GitLab server:
# Omnibus
sudo mv /path/to/12345_gitlab_ci_backup.tar /var/opt/gitlab/backups/
#### 8. Import GitLab CI backup # Source
sudo mv /path/to/12345_gitlab_ci_backup.tar /home/git/gitlab/tmp/backups/
Now you'll import the GitLab CI database dump that you created earlier into the ```
GitLab CE or EE database:
# Manual installation #### 5. Import the CI data into GitLab.
sudo -u git -H bundle exec rake ci:migrate RAILS_ENV=production
# Omnibus installation This step will delete any existing CI data on your GitLab server. There should
sudo gitlab-rake ci:migrate be no CI data yet because you turned CI on the GitLab server off earlier.
This task will take some time. ```
# On your GitLab server:
# Omnibus
sudo gitlab-rake ci:migrate
This migration task automatically re-enables the CI setting that you # Source
[disabled earlier](#2-prevent-ci-usage-during-the-migration-process). cd /home/git/gitlab
sudo -u git -H bundle exec rake ci:migrate RAILS_ENV=production
```
#### 9. Start GitLab #### 6. Restart GitLab
You can start GitLab CE (or EE) now and see if everything is working: ```
# On your GitLab server:
# Omnibus
sudo gitlab-ctl hup unicorn
sudo gitlab-ctl restart sidekiq
# Manual installation # Source
sudo service gitlab start sudo service gitlab reload
```
# Omnibus installation ### III. Redirecting traffic
sudo gitlab-ctl restart unicorn sidekiq
### Part III: Nginx configuration If you were running GitLab CI with Omnibus packages and you were using the
internal NGINX configuration your CI service should now be available both at
`ci.example.com` (the old address) and `gitlab.example.com/ci`. **You are done!**
This section is only required for **manual installations**. Omnibus users can If you installed GitLab CI from source we now need to configure a redirect in
[skip to the final step](#part-iv-finishing-up). NGINX so that existing CI runners can keep using the old CI server address, and
so that existing links to your CI server keep working.
#### 1. Update Nginx configuration #### 1. Update Nginx configuration
...@@ -296,16 +307,6 @@ You should also make sure that you can: ...@@ -296,16 +307,6 @@ You should also make sure that you can:
sudo /etc/init.d/nginx restart sudo /etc/init.d/nginx restart
### Part IV: Finishing Up
If everything went well you should be able to access your migrated CI install by
visiting `https://gitlab.example.com/ci/`. If you visit the old GitLab CI
address, you should be redirected to the new one.
**Enjoy!**
### Troubleshooting
#### Restore from backup #### Restore from backup
If something went wrong and you need to restore a backup, consult the [Backup If something went wrong and you need to restore a backup, consult the [Backup
......
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