CAS OmniAuth Provider
To enable the CAS OmniAuth provider you must register your application with your CAS instance. This requires the service URL GitLab will supply to CAS. It should be something like: https://gitlab.example.com:443/users/auth/cas3/callback?url
. By default handling for SLO is enabled, you only need to configure CAS for backchannel logout.
-
On your GitLab server, open the configuration file.
For Omnibus package:
sudo editor /etc/gitlab/gitlab.rb
For installations from source:
cd /home/git/gitlab sudo -u git -H editor config/gitlab.yml
-
See Initial OmniAuth Configuration for initial settings.
-
Add the provider configuration:
For Omnibus package:
gitlab_rails['omniauth_providers'] = [ { "name"=> "cas3", "label"=> "cas", "args"=> { "url"=> 'CAS_SERVER', "login_url"=> '/CAS_PATH/login', "service_validate_url"=> '/CAS_PATH/p3/serviceValidate', "logout_url"=> '/CAS_PATH/logout' } } ]
For installations from source:
- { name: 'cas3', label: 'cas', args: { url: 'CAS_SERVER', login_url: '/CAS_PATH/login', service_validate_url: '/CAS_PATH/p3/serviceValidate', logout_url: '/CAS_PATH/logout'} }
-
Change ‘CAS_PATH’ to the root of your CAS instance (ie.
cas
). -
If your CAS instance does not use default TGC lifetimes, update the
cas3.session_duration
to at least the current TGC maximum lifetime. To explicitly disable SLO, regardless of CAS settings, set this to 0. -
Save the configuration file.
-
Reconfigure or restart GitLab for the changes to take effect if you installed GitLab via Omnibus or from source respectively.
On the sign in page there should now be a CAS tab in the sign in form.
Help and feedback
If there's something you don't like about this feature
To propose functionality that GitLab does not yet offer
To further help GitLab in shaping new features
If you didn't find what you were looking for
If you want help with something very specific to your use case, and can use some community support
POST ON GITLAB FORUM
If you have problems setting up or using this feature (depending on your GitLab subscription)
REQUEST SUPPORT
To view all GitLab tiers and features or to upgrade
If you want to try all features available in GitLab.com
If you want to try all features available in GitLab self-managed
If you spot an error or a need for improvement and would like to fix it yourself in a merge request
EDIT THIS PAGE
If you would like to suggest an improvement to this doc