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I am trying to connect to GitLab production (installed with omnibus package) postgresql database with psycopg2.

My configuration is like below:

onn = psycopg2.connect(database="gitlabhq_production", user="gitlab-psql", host="/var/opt/gitlab/postgresql", port="5432")

It gives the following error:

FATAL:  Peer authentication failed for user "gitlab-psql"

I can connect to the postgresql server on command line with:

sudo -u gitlab-psql -i bash /opt/gitlab/embedded/bin/psql --port 5432 -h /var/opt/gitlab/postgresql -d gitlabhq_production

Does anyone know what will be the correct parameters to pass into?

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Peer authentication works by checking the user the process is running as. In your command line example you switch to gitlab-psql using sudo.

There are two ways to fix this:

  1. Assign a password to the gitlab-psql postgres user (not the system user!) and use that to connect via python. Setting the password is just another query you need to run as a superuser like so:

    sudo -u postgres psql -c "ALTER USER gitlab-psql WITH PASSWORD 'ReplaceThisWithYourLongAndSecurePassword';"

  2. Run your python script as gitlab-psql like so:

    sudo -u gitlab-psql python /path/to/your/script.py
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Does the omnibus-gitlab application require any changes via gitlab-ctl reconfigure after adding a password to postgresql user gitlab-psql?

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