Gitlab LDAP Integration

Gitlab : GitLab is a single application for the entire software development lifecycle. From project planning and source code management to CI/CD, monitoring, and security.

GitLab is the first single application built from the ground up for all stages of the DevOps lifecycle for Product, Development, QA, Security, and Operations teams to work concurrently on the same project.
GitLab enables teams to collaborate and work from a single conversation, instead of managing multiple threads across disparate tools.
GitLab provides teams a single data store, one user interface, and one permission model across the DevOps lifecycle allowing teams to collaborate, significantly reducing cycle time and focus exclusively on building great software quickly.
GitLab’s Kubernetes integration makes it easy to create and configure clusters. With Auto DevOps, GitLab automatically configures CI/CD pipelines to build, test, verify, and deploy applications to Kubernetes.

HOST IP : 10.0.0.1 (VM On ESXi )

URL : http://gitlab.techcontrolz.in/users/sign_in

RAM : 4 Gb

HDD : 20 Gb

OS : Cent OS 7 64 Bit

Username : root

Standard User for WebGUI : root password : welcome

Installation of GITLAB on Centos 7 :

1. Install and configure the necessary dependencies:

On CentOS 7 (and RedHat/Oracle/Scientific Linux 7), the commands below will also open HTTP and SSH access in the system firewall.

i)sudo yum install -y curl policycoreutils-python openssh-server

ii)sudo systemctl enable sshd

iii)sudo systemctl start sshd

iv)sudo firewall-cmd --permanent --add-service=http

v)sudo systemctl reload firewalld

Next, install Postfix to send notification emails. If you want to use another solution to send emails please skip this step and configure an external SMTP server after GitLab has been installed.

i)sudo yum install postfix

ii)sudo systemctl enable postfix

iii)sudo systemctl start postfix

During Postfix installation a configuration screen may appear. Select 'Internet Site' and press enter. Use your server's external DNS for 'mail name' and press enter. If additional screens appear, continue to press enter to accept the defaults.

2. Add the GitLab package repository and install the package

Add the GitLab package repository.

curl https://packages.gitlab.com/install/repositories/gitlab/gitlab-ee/script.rpm.sh | sudo bash

Next, install the GitLab package. Change https://gitlab.example.com to the URL at which you want to access(http://gitlab.mumbai.cdac.in) your GitLab instance. Installation will automatically configure and start GitLab at that URL.

sudo EXTERNAL_URL="https://gitlab.example.com" yum install -y gitlab-ee

3. Browse to the hostname and login

On your first visit, you'll be redirected to a password reset screen. Provide the password for the initial administrator account and you will be redirected back to the login screen. Use the default account's username root to login.

See official documentation for detailed instructions on installing and configuration.

TO INTEGRATE GITLAB TO CDAC MUMBAI LDAP Use following settings :

Create one user ‘gitlab’ with default password ‘Password@123’ for authentication with Active Directory .
Edit file /etc/gitlab/gitlab.rb
On line no 278 onwards add the following configuration in LDAP configuration :

278 gitlab_rails['ldap_enabled'] = true

279 gitlab_rails['ldap_servers'] = {

280 'main' => {

281 'label' => 'MY LDAP',

282 'host' => '<insert your hostname of Domain controller >',

283 'port' => '389',

284 'uid' => 'sAMAccountName',

285 'encryption' => 'plain',

286 'verify_certificates' => 'false',

287 'bind_dn' => 'cn=gitlab,ou=ldap_test, DC = <domain name>, DC= com',

288 'password'=> 'Password@123',

289 'active_directory' => true,