How to install GitLab in RedHat environment

In recent years, GitLab, as an open source Git library management tool, has received more and more attention and use. Compared to GitHub, GitLab offers more freedom to meet the needs of professional developers. As a Linux operating system, RedHat also has an irreplaceable position in the minds of many developers. Today we will introduce how to install GitLab in a RedHat environment.

1. Installation dependencies

First you need to install some necessary tools and libraries, such as curl, policycoreutils-python, etc.:

sudo yum install curl policycoreutils-python openssh-server
sudo systemctl enable sshd
sudo systemctl start sshd
sudo firewall-cmd --permanent --add-service=http
sudo systemctl restart firewalld

2. Install email Server

In order to send emails to users, you need to install a mail server:

sudo yum install postfix
sudo systemctl enable postfix
sudo systemctl start postfix

3. Install GitLab

Add the GitLab repository through the following commands and Update:

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

4. Configuring GitLab

After the installation is complete, some basic configuration is required. First you need to modify /etc/gitlab/gitlab.rb. You can modify it through the editor or command line, and choose the appropriate method according to the environment:

sudo nano /etc/gitlab/gitlab.rb
或者
sudo sed -i 's/external_url 'http:\/\/gitlab.example.com'/external_url 'http:\/\/yourdomain.com'/g' /etc/gitlab/gitlab.rb

Change external_url to your own GitLab address.

Next, you need to reconfigure and start GitLab:

sudo gitlab-ctl reconfigure
sudo gitlab-ctl start

It may take some time during the reconfiguration, please be patient.

5. Log in to GitLab

After installing and starting GitLab, you need to log in on the browser. Enter the external address you configured http://yourdomain.com in the browser, and you will see the GitLab login interface. When entering for the first time, you need to set up an administrator account and password. After setting up, you can log in and start using GitLab.

6. Problems encountered

There are some common problems to pay attention to during the installation process:

Q1: Stuck at 'Running handlers' during the installation process

This is caused by the server space being too small and can be optimized before installation.

Q2: Unable to access the GitLab server

You can use the curl command to check whether the GitLab service is running, or you can check whether the Linux firewall blocks access to the GitLab service. You can use the following command to solve the problem:

sudo firewall-cmd --zone=public --permanent --add-port=80/tcp
sudo firewall-cmd --zone=public --permanent --add-port=22/tcp
sudo firewall-cmd --reload

Q3: GitLab process crashes

Because the GitLab process runs for too long, it may crash due to too many processes. You can use the following command to restart GitLab:

sudo gitlab-ctl restart

In this article, we introduce the process of installing GitLab in a Red Hat environment and list solutions to common problems. Using GitLab can effectively manage code, team members can collaborate better, and improve software development efficiency. Through the introduction of this article, I hope that everyone can better use GitLab to carry out work.

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