debian-mirror-gitlab/doc/migrate_ci_to_ce/README.md

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---
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stage: none
group: unassigned
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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/#assignments
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type: howto
---
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# Migrate GitLab CI to GitLab CE or EE
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Beginning with version 8.0 of GitLab Community Edition (CE) and Enterprise
Edition (EE), GitLab CI is no longer its own application, but is instead built
into the CE and EE applications.
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This guide details the process of migrating your CI installation and data
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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.**
We recommend that you read through the entire migration process in this
document before beginning.
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## Overview
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In this document we assume you have a GitLab server and a GitLab CI server. It
does not matter if these are the same machine.
The migration consists of three parts: updating GitLab and GitLab CI, moving
data, and redirecting traffic.
Please note that CI builds triggered on your GitLab server in the time between
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updating to 8.0 and finishing the migration are lost. Your GitLab server
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can be online for most of the procedure; the only GitLab downtime (if any) is
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during the upgrade to 8.0. Your CI service remains offline from the moment you
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upgrade to 8.0 until you finish the migration procedure.
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## Before upgrading
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If you have GitLab CI installed using Omnibus GitLab packages but **you don't want to migrate your existing data**:
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```shell
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mv /var/opt/gitlab/gitlab-ci/builds /var/opt/gitlab/gitlab-ci/builds.$(date +%s)
```
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run `sudo gitlab-ctl reconfigure` and you can reach CI at `gitlab.example.com/ci`.
If you want to migrate your existing data, continue reading.
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### 0. Updating Omnibus from versions prior to 7.13
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If you are updating from older versions you should first update to 7.14 and then to 8.0
to avoid the problems described in the [Troubleshooting](#troubleshooting) section.
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### 1. Verify that backups work
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Make sure that the backup script on both servers can connect to the database.
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```shell
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# On your CI server:
# Omnibus
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sudo chown gitlab-ci:gitlab-ci /var/opt/gitlab/gitlab-ci/builds
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sudo gitlab-ci-rake backup:create
# Source
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake backup:create RAILS_ENV=production
```
Also check on your GitLab server.
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```shell
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# On your GitLab server:
# Omnibus
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sudo gitlab-backup create SKIP=repositories,uploads
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# Source
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production SKIP=repositories,uploads
```
If this fails you need to fix it before upgrading to 8.0. Also see
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<https://about.gitlab.com/get-help/>
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NOTE:
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For GitLab 12.1 and earlier, use `gitlab-rake gitlab:backup:create`.
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### 2. Check source and target database types
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Check what databases you use on your GitLab server and your CI server.
Look for the 'adapter:' line. If your CI server and your GitLab server use
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.**
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```shell
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# On your CI server:
# Omnibus
sudo gitlab-ci-rake env:info
# Source
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake env:info RAILS_ENV=production
```
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```shell
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# On your GitLab server:
# Omnibus
sudo gitlab-rake gitlab:env:info
# Source
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
```
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### 3. Storage planning
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Decide where to store CI build traces on GitLab server. GitLab CI uses
files on disk to store CI build traces. The default path for these build
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.
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## I. Upgrading
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From this point on, GitLab CI is unavailable for your end users.
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### 1. Upgrade GitLab to 8.0
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First upgrade your GitLab server to version 8.0:
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<https://about.gitlab.com/update/>
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### 2. Disable CI on the GitLab server during the migration
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After you update, go to the admin panel and temporarily disable CI. As
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an administrator, go to **Admin Area** -> **Settings**, and under
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**Continuous Integration** uncheck **Disable to prevent CI usage until `rake
ci:migrate` is run (8.0 only)**.
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### 3. CI settings are now in GitLab
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If you want to use custom CI settings (e.g. change where builds are
stored), please update `/etc/gitlab/gitlab.rb` (Omnibus) or
`/home/git/gitlab/config/gitlab.yml` (Source).
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### 4. Upgrade GitLab CI to 8.0
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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.
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### 5. Disable GitLab CI on the CI server
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Disable GitLab CI after upgrading to 8.0.
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```shell
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# 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
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sudo -u gitlab_ci -H bundle exec whenever --clear-crontab RAILS_ENV=production
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```
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## II. Moving data
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### 1. Database encryption key
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Move the database encryption key from your CI server to your GitLab
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server. The command below shows you what you need to copy-paste to your
GitLab server. On Omnibus GitLab servers you must add a line to
`/etc/gitlab/gitlab.rb`. On GitLab servers installed from source you must
replace the contents of `/home/git/gitlab/config/secrets.yml`.
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```shell
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# On your CI server:
# Omnibus
sudo gitlab-ci-rake backup:show_secrets
# Source
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake backup:show_secrets RAILS_ENV=production
```
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### 2. SQL data and build traces
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Create your final CI data export. If you are converting from MySQL to
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PostgreSQL, add `MYSQL_TO_POSTGRESQL=1` to the end of the Rake command. When
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the command finishes it prints the path to your data export archive; you
need this file later.
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```shell
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# On your CI server:
# Omnibus
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sudo chown gitlab-ci:gitlab-ci /var/opt/gitlab/gitlab-ci/builds
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sudo gitlab-ci-rake backup:create
# Source
cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rake backup:create RAILS_ENV=production
```
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### 3. Copy data to the GitLab server
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If you were running GitLab and GitLab CI on the same server you can skip this
step.
Copy your CI data archive to your GitLab server. There are many ways to do
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this, below we use SSH agent forwarding and `scp`, which is easy and fast
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for most setups. You can also copy the data archive first from the CI server to
your laptop and then from your laptop to the GitLab server.
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```shell
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# Start from your laptop
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:~
```
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### 4. Move data to the GitLab backups folder
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Make the CI data archive discoverable for GitLab. We assume below that you
store backups in the default path, adjust the command if necessary.
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```shell
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# On your GitLab server:
# Omnibus
sudo mv /path/to/12345_gitlab_ci_backup.tar /var/opt/gitlab/backups/
# Source
sudo mv /path/to/12345_gitlab_ci_backup.tar /home/git/gitlab/tmp/backups/
```
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### 5. Import the CI data into GitLab
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This step deletes any existing CI data on your GitLab server. There should
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be no CI data yet because you turned CI on the GitLab server off earlier.
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```shell
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# On your GitLab server:
# Omnibus
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sudo chown git:git /var/opt/gitlab/gitlab-ci/builds
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sudo gitlab-rake ci:migrate
# Source
cd /home/git/gitlab
sudo -u git -H bundle exec rake ci:migrate RAILS_ENV=production
```
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### 6. Restart GitLab
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```shell
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# On your GitLab server:
# Omnibus
sudo gitlab-ctl hup unicorn
sudo gitlab-ctl restart sidekiq
# Source
sudo service gitlab reload
```
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## III. Redirecting traffic
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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!**
If you installed GitLab CI from source we now need to configure a redirect in
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.
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### 1. Update NGINX configuration
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To ensure that your existing CI runners are able to communicate with the
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migrated installation, and that existing build triggers still work, you must
update your NGINX configuration to redirect requests for the old locations to
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the new ones.
Edit `/etc/nginx/sites-available/gitlab_ci` and paste:
```nginx
# GITLAB CI
server {
listen 80 default_server; # e.g., listen 192.168.1.1:80;
server_name YOUR_CI_SERVER_FQDN; # e.g., server_name source.example.com;
access_log /var/log/nginx/gitlab_ci_access.log;
error_log /var/log/nginx/gitlab_ci_error.log;
# expose API to fix runners
location /api {
proxy_read_timeout 300;
proxy_connect_timeout 300;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
# You need to specify your DNS servers that are able to resolve YOUR_GITLAB_SERVER_FQDN
resolver 8.8.8.8 8.8.4.4;
proxy_pass $scheme://YOUR_GITLAB_SERVER_FQDN/ci$request_uri;
}
# redirect all other CI requests
location / {
return 301 $scheme://YOUR_GITLAB_SERVER_FQDN/ci$request_uri;
}
# adjust this to match the largest build log your runners might submit,
# set to 0 to disable limit
client_max_body_size 10m;
}
```
Make sure you substitute these placeholder values with your real ones:
1. `YOUR_CI_SERVER_FQDN`: The existing public-facing address of your GitLab CI
install (e.g., `ci.gitlab.com`).
1. `YOUR_GITLAB_SERVER_FQDN`: The current public-facing address of your GitLab
CE (or EE) install (e.g., `gitlab.com`).
**Make sure not to remove the `/ci$request_uri` part. This is required to
properly forward the requests.**
You should also make sure that you can:
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1. `curl "https://YOUR_GITLAB_SERVER_FQDN/"` from your previous GitLab CI server.
1. `curl "https://YOUR_CI_SERVER_FQDN/"` from your GitLab CE (or EE) server.
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### 2. Check NGINX configuration
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```shell
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sudo nginx -t
```
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### 3. Restart NGINX
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```shell
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sudo /etc/init.d/nginx restart
```
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### Restore from backup
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If something went wrong and you need to restore a backup, consult the [Backup
restoration](../raketasks/backup_restore.md) guide.
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## Troubleshooting
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### show:secrets problem (Omnibus-only)
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If you see errors like this:
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```plaintext
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Missing `secret_key_base` or `db_key_base` for 'production' environment. The secrets will be generated and stored in `config/secrets.yml`
rake aborted!
Errno::EACCES: Permission denied @ rb_sysopen - config/secrets.yml
```
This can happen if you are updating from versions prior to 7.13 straight to 8.0.
The fix for this is to update to Omnibus 7.14 first and then update it to 8.0.
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### Permission denied when accessing `/var/opt/gitlab/gitlab-ci/builds`
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To fix that issue you have to change builds/ folder permission before doing final backup:
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```shell
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sudo chown -R gitlab-ci:gitlab-ci /var/opt/gitlab/gitlab-ci/builds
```
Then before executing `ci:migrate` you need to fix builds folder permission:
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```shell
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sudo chown git:git /var/opt/gitlab/gitlab-ci/builds
```
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### Problems when importing CI database to GitLab
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If you were migrating CI database from MySQL to PostgreSQL manually you can see errors during import about missing sequences:
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```sql
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ALTER SEQUENCE
ERROR: relation "ci_builds_id_seq" does not exist
ERROR: relation "ci_commits_id_seq" does not exist
ERROR: relation "ci_events_id_seq" does not exist
ERROR: relation "ci_jobs_id_seq" does not exist
ERROR: relation "ci_projects_id_seq" does not exist
ERROR: relation "ci_runner_projects_id_seq" does not exist
ERROR: relation "ci_runners_id_seq" does not exist
ERROR: relation "ci_services_id_seq" does not exist
ERROR: relation "ci_taggings_id_seq" does not exist
ERROR: relation "ci_tags_id_seq" does not exist
CREATE TABLE
```
To fix that you need to apply this SQL statement before doing final backup:
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Omnibus GitLab installations:
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```sql
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gitlab-ci-rails dbconsole <<EOF
-- ALTER TABLES - DROP DEFAULTS
ALTER TABLE ONLY ci_application_settings ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_builds ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_commits ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_events ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_jobs ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_projects ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_runner_projects ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_runners ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_services ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_taggings ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_tags ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_trigger_requests ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_triggers ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_variables ALTER COLUMN id DROP DEFAULT;
ALTER TABLE ONLY ci_web_hooks ALTER COLUMN id DROP DEFAULT;
-- ALTER SEQUENCES
ALTER SEQUENCE ci_application_settings_id_seq OWNED BY ci_application_settings.id;
ALTER SEQUENCE ci_builds_id_seq OWNED BY ci_builds.id;
ALTER SEQUENCE ci_commits_id_seq OWNED BY ci_commits.id;
ALTER SEQUENCE ci_events_id_seq OWNED BY ci_events.id;
ALTER SEQUENCE ci_jobs_id_seq OWNED BY ci_jobs.id;
ALTER SEQUENCE ci_projects_id_seq OWNED BY ci_projects.id;
ALTER SEQUENCE ci_runner_projects_id_seq OWNED BY ci_runner_projects.id;
ALTER SEQUENCE ci_runners_id_seq OWNED BY ci_runners.id;
ALTER SEQUENCE ci_services_id_seq OWNED BY ci_services.id;
ALTER SEQUENCE ci_taggings_id_seq OWNED BY ci_taggings.id;
ALTER SEQUENCE ci_tags_id_seq OWNED BY ci_tags.id;
ALTER SEQUENCE ci_trigger_requests_id_seq OWNED BY ci_trigger_requests.id;
ALTER SEQUENCE ci_triggers_id_seq OWNED BY ci_triggers.id;
ALTER SEQUENCE ci_variables_id_seq OWNED BY ci_variables.id;
ALTER SEQUENCE ci_web_hooks_id_seq OWNED BY ci_web_hooks.id;
-- ALTER TABLES - RE-APPLY DEFAULTS
ALTER TABLE ONLY ci_application_settings ALTER COLUMN id SET DEFAULT nextval('ci_application_settings_id_seq'::regclass);
ALTER TABLE ONLY ci_builds ALTER COLUMN id SET DEFAULT nextval('ci_builds_id_seq'::regclass);
ALTER TABLE ONLY ci_commits ALTER COLUMN id SET DEFAULT nextval('ci_commits_id_seq'::regclass);
ALTER TABLE ONLY ci_events ALTER COLUMN id SET DEFAULT nextval('ci_events_id_seq'::regclass);
ALTER TABLE ONLY ci_jobs ALTER COLUMN id SET DEFAULT nextval('ci_jobs_id_seq'::regclass);
ALTER TABLE ONLY ci_projects ALTER COLUMN id SET DEFAULT nextval('ci_projects_id_seq'::regclass);
ALTER TABLE ONLY ci_runner_projects ALTER COLUMN id SET DEFAULT nextval('ci_runner_projects_id_seq'::regclass);
ALTER TABLE ONLY ci_runners ALTER COLUMN id SET DEFAULT nextval('ci_runners_id_seq'::regclass);
ALTER TABLE ONLY ci_services ALTER COLUMN id SET DEFAULT nextval('ci_services_id_seq'::regclass);
ALTER TABLE ONLY ci_taggings ALTER COLUMN id SET DEFAULT nextval('ci_taggings_id_seq'::regclass);
ALTER TABLE ONLY ci_tags ALTER COLUMN id SET DEFAULT nextval('ci_tags_id_seq'::regclass);
ALTER TABLE ONLY ci_trigger_requests ALTER COLUMN id SET DEFAULT nextval('ci_trigger_requests_id_seq'::regclass);
ALTER TABLE ONLY ci_triggers ALTER COLUMN id SET DEFAULT nextval('ci_triggers_id_seq'::regclass);
ALTER TABLE ONLY ci_variables ALTER COLUMN id SET DEFAULT nextval('ci_variables_id_seq'::regclass);
ALTER TABLE ONLY ci_web_hooks ALTER COLUMN id SET DEFAULT nextval('ci_web_hooks_id_seq'::regclass);
EOF
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```
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Source installations:
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```shell
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cd /home/gitlab_ci/gitlab-ci
sudo -u gitlab_ci -H bundle exec rails dbconsole production <<EOF
... COPY SQL STATEMENTS FROM ABOVE ...
EOF
```