CentOS7 environment: install and configure gitlab (applicable to intranet and extranet environments)

To install and configure GitLab in CentOS 7 environment, whether it is an intranet or an extranet environment, the following is a simple tutorial:

1. Install and configure dependencies:

   • Open a terminal and log in to CentOS 7 with root privileges.

   • Install the necessary dependencies, including curl, openssh-server, postfix, etc.

     yum install -y curl openssh-server postfix
     systemctl enable sshd postfix
     systemctl start sshd postfix

2. Add the GitLab repository:

   • Run the following commands to add the GitLab repository and install GitLab:

     curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash
     yum install -y gitlab-ce

3. Configure GitLab:

   • Open the GitLab configuration file  /etc/gitlab/gitlab.rbfor configuration.

   • Configure the external URL, which is the access address of GitLab.

     external_url 'http://your_domain_or_IP'

   • Optional: Depending on your needs, you can also configure other options such as SMTP mail server, backup settings, etc.
   • Save and close the configuration file.

4. Install and configure GitLab:

   • Run the following commands to install and configure GitLab:

     gitlab-ctl reconfigure

5. To access and use GitLab:

   • Visit the configured external URL ( http://your_domain_or_IP ) in a web browser .
   • Follow the instructions of the wizard to create an administrator account and password.
   • Once logged in, you can create projects, invite members, manage repositories, and more.

6. Configure the firewall:

   • If a firewall is enabled on your server, you will need to configure the firewall to allow access to GitLab.

   • Run the following commands to open HTTP and SSH ports (as needed):

     firewall-cmd --permanent --zone=public --add-service=http
     firewall-cmd --permanent --zone=public --add-service=https
     firewall-cmd --permanent --zone=public --add-service=ssh
     firewall-cmd --reload

These are the basic steps to install and configure GitLab on CentOS 7 environment. Depending on your needs and specific environment, additional configuration and tuning may be required. Please ensure that you have a detailed understanding of your network environment and security requirements and take appropriate security measures before performing any operations related to network connection and security.