Configuring a Database for GitLab HA

You can choose to install and manage a database server (PostgreSQL/MySQL) yourself, or you can use GitLab Omnibus packages to help. GitLab recommends PostgreSQL. This is the database that will be installed if you use the Omnibus package to manage your database.

Configure your own database server

If you're hosting GitLab on a cloud provider, you can optionally use a managed service for PostgreSQL. For example, AWS offers a managed Relational Database Service (RDS) that runs PostgreSQL.

If you use a cloud-managed service, or provide your own PostgreSQL:

Setup PostgreSQL according to the database requirements document.
Set up a gitlab username with a password of your choice. The gitlab user needs privileges to create the gitlabhq_production database.
Configure the GitLab application servers with the appropriate details. This step is covered in Configuring GitLab for HA.

Configure using Omnibus

Download/install GitLab Omnibus using steps 1 and 2 from GitLab downloads. Do not complete other steps on the download page.

Create/edit /etc/gitlab/gitlab.rb and use the following configuration. Be sure to change the external_url to match your eventual GitLab front-end URL.

external_url 'https://gitlab.example.com'

# Disable all components except PostgreSQL
postgresql['enable'] = true
bootstrap['enable'] = false
nginx['enable'] = false
unicorn['enable'] = false
sidekiq['enable'] = false
redis['enable'] = false
gitlab_workhorse['enable'] = false
mailroom['enable'] = false

# PostgreSQL configuration
gitlab_rails['db_password'] = 'DB password'
postgresql['md5_auth_cidr_addresses'] = ['0.0.0.0/0']
postgresql['listen_address'] = '0.0.0.0'

# Disable automatic database migrations
gitlab_rails['auto_migrate'] = false

Run sudo gitlab-ctl reconfigure to install and configure PostgreSQL.

Note: This reconfigure step will result in some errors. That's OK - don't be alarmed.

Open a database prompt:

su - gitlab-psql
/bin/bash
psql -h /var/opt/gitlab/postgresql -d template1

# Output:

psql (9.2.15)
Type "help" for help.

template1=#

Run the following command at the database prompt and you will be asked to enter the new password for the PostgreSQL superuser.
```
\password

# Output:

Enter new password:
Enter it again:
```
Similarly, set the password for the gitlab database user. Use the same password that you specified in the /etc/gitlab/gitlab.rb file for gitlab_rails['db_password'].
```
\password gitlab

# Output:

Enter new password:
Enter it again:
```

Enable the pg_trgm extension:

CREATE EXTENSION pg_trgm;

# Output:

CREATE EXTENSION

Exit the database prompt by typing \q and Enter.
Exit the gitlab-psql user by running exit twice.
Run sudo gitlab-ctl reconfigure a final time.
Configure the GitLab application servers with the appropriate details. This step is covered in Configuring GitLab for HA.

Read more on high-availability configuration: