28-05-2013 | Remy van Elst
Gitlab is a self hosted git based source control application similar to Github, written in Ruby on Rails. It is used by many organisations and is a wonderfull piece of software. It supports LDAP Authentication (via the OmniAuth Gem), but it is tricky to set up with Active Directory and Windows Server 2003/2008/2012. This tutorials shows you how to set up Gitlab to authenticate against Active Directory LDAP.
You have to have a working Gitlab installation for this. It is tested with Gitlab 3 and up to 5.2, with an Active Directory 2008 env, and a Mixed 2008 & 2003 AD. Gitlab is installed on a Ubuntu box.
First create a user in the Active Directory. My CN is Users, and my user is named
gitlab. It does not have any special permissions, it is just a normal user. Note the Full Name you use, in my example it is "Gitlab LDAP". See the image below for an example:
Now go to your Gitlab server, log in and become the git user:
sudo su - git
And edit the
~/gitlab/config/gitlab.yml file. (Assuming you followed the official installation guide, otherwise adapt path.). The relevant LDAP section should contain this:
ldap: enabled: true host: 'pdc1.domain.tld' base: 'CN=Users,DC=Domain,DC=tld' port: 389 uid: 'sAMAccountName' method: 'plain' # or "ssl" bind_dn: 'CN=Gitlab LDAP,CN=Users,DC=Domain,DC=tld' password: 'example_password'
It took me a while to find the correct
base_dn. It appears that they are capital sensitive,
cn=Users would not work, but
CN=Users does. Also, the
bind_dn does not use the users email address, but the
Display Name. So
CNfirstname.lastname@example.org does not work, but
CN=Gitlab LDAP does.
Hope this helps you setting up Gitlab with LDAP auth. More info on Gitlab can be found on their website: http://gitlab.org/.