Commands
In this article, we will review the top 10 most commonly used Git commands. You can’t call yourself a competent DevOps Engineer or IT professional
Learn how to effortlessly install GitLab CE on your RHEL 9 or CentOS 9 system with our comprehensive guide. Follow our step-by-step instructions for a smooth setup and unlock the full potential of GitLab’s powerful features for your development projects.
Are you eager to set up GitLab CE on your RHEL 9 or CentOS 9 system? Great choice! GitLab is a robust platform for managing your Git repositories, CI/CD pipelines, and much more—all in one place. In this guide, we’ll walk you through the installation process step by step, ensuring a smooth setup on your Red Hat Enterprise Linux or CentOS environment.
Before diving into the installation, let’s ensure we have all the necessary prerequisites:
We’ve configured our RHEL 9 instance with the following settings:
| Hostname | gitlab.naijalabs.net |
| IP address | 192.168.1.24 |
| RAM | 8 GB |
| Cores | 2 |
First things first, let’s ensure our system packages are up to date. Open your terminal and execute the following command:
sudo dnf update
This command will update all the packages to their latest versions, ensuring compatibility and security patches are in place.
GitLab has a few dependencies that need to be installed. Use the following command to install them:
sudo dnf install -y curl policycoreutils openssh-server openssh-clients
Now it’s time to install the GitLab CE repositories on your system. Run the following command:
curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash
Once the repository is added, install GitLab CE using DNF:
sudo dnf install -y gitlab-ce
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After installation, we need to configure GitLab. Open the GitLab configuration file using your preferred text editor. Here, we’ll use Vim:
sudo vim /etc/gitlab/gitlab.rb
Within this file, you can configure various settings according to your preferences, such as external URL, SMTP settings, and more. Make necessary changes, then save and close the file.
## GitLab URL
##! URL on which GitLab will be reachable.
##! For more details on configuring external_url see:
##! https://docs.gitlab.com/omnibus/settings/configuration.html#configuring-the-external-url-for-gitlab
##!
##! Note: During installation/upgrades, the value of the environment variable
##! EXTERNAL_URL will be used to populate/replace this value.
##! On AWS EC2 instances, we also attempt to fetch the public hostname/IP
##! address from AWS. For more details, see:
##! https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html
external_url 'http://localhost:7000'
After modifying the configuration, reconfigure GitLab to apply the changes:
sudo gitlab-ctl reconfigure
Execute the following command(s) to confirm that ports 80, 443, and 7000 are accessible for inbound and outbound traffic:
sudo firewall-cmd --add-port=80/tcp --add-port=443/tcp --add-port=7000/tcp --permanent; sudo firewall-cmd --reload
Once the reconfiguration is complete, you can access GitLab via your web browser. Simply navigate to the URL you specified in the configuration file (e.g., http://localhost:7000 or server-IP-address:7000).
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Install Nginx with the following command:
sudo dnf -y install nginx
Create a gitlab.conf file to setup nginx as proxy:
sudo vim /etc/nginx/conf.d/gitlab.conf
Copy and paste the following content into the file. Then, save and exit the file.
server {
listen 80;
listen [::]:80;
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name gitlab.naijalabs.net;
ssl_certificate "/etc/letsencrypt/live/naijalabs.net/fullchain.pem";
ssl_certificate_key "/etc/letsencrypt/live/naijalabs.net/privkey.pem";
ssl_session_cache shared:SSL:1m;
ssl_session_timeout 10m;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
location / {
proxy_pass http://localhost:7000;
}
}
NOTE: Ensure the paths to
ssl_certificateandssl_certificate_keypoint to where your SSL certificate and key files reside on your machine.
Run the following commands to start Nginx and enable it to autostart on boot:
sudo systemctl daemon-reload; sudo systemctl enable --now nginx
To enable network communications between Nginx and GitLab, execute the following commands to adjust the SELinux Boolean accordingly.
sudo setsebool -P httpd_can_network_connect 1; sudo setsebool -P nis_enabled 1
Well done! Your GitLab CE instance is now secure and accessible over HTTPS!
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Your initial login credentials are located in the /etc/gitlab/initial_root_password file for the root user. You can also reset the root password with the following command:
sudo gitlab-rake "gitlab:password:reset[root]"
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