GitLab Community Edition is an open source application that allows a team to develope and manage their projects, powerful, its robust, scalable, secure, and efficient software
GitLab also provides the teams a single destination of data store, In this article, we will show you How to Install GitLab on Centos7 . GitLab will use some ports on your server, its preferable to install this on a fresh server to avoid any conflicts.
Install and Configure Gitlab on Centos7
Step 1: Install and Configure Centos packages Dependencies.
1-1. Install dependencies
# yum install curl policycoreutils-python openssh-server
Dependencies Resolved
==================================================================================================== Package Arch Version Repository Size ==================================================================================================== Installing: policycoreutils-python x86_64 2.5-22.el7 base 454 k Installing for dependencies: audit-libs-python x86_64 2.8.1-3.el7_5.1 updates 75 k checkpolicy x86_64 2.5-6.el7 base 294 k libcgroup x86_64 0.41-15.el7 base 65 k libsemanage-python x86_64 2.5-11.el7 base 112 k python-IPy noarch 0.75-6.el7 base 32 k setools-libs x86_64 3.3.8-2.el7 base 619 k Transaction Summary ==================================================================================================== Install 1 Package (+6 Dependent packages)
1-2. Install Postfix
installing Postfix service to send notification emails is optional if you want to  activate it please follow the stpes bellow .
# yum install postfix # systemctl start postfix # systemctl enable postfix # systemctl status postfix
During this installation a configuration Select ‘Internet Site‘ and use your server’s external DNS for ‘mail name‘ and press enter.
Step 2: Add GitLab Repository to you Centos
Please add the bellow Rep to be able to fetch the Gitlab software
curl https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash
Check if the Repository has been added
[root@osradar ~]# yum repolist Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.nforce.com * elrepo: ftp.nluug.nl * extras: mirror.i3d.net * updates: centos.mirror.transip.nl repo id repo name status base/7/x86_64 CentOS-7 - Base 9,911 elrepo ELRepo.org Community Enterprise Linux Repository - el7 246 extras/7/x86_64 CentOS-7 - Extras 432 gitlab_gitlab-ce/x86_64 gitlab_gitlab-ce 401 gitlab_gitlab-ce-source gitlab_gitlab-ce-source 0 updates/7/x86_64 CentOS-7 - Updates 1,561 repolist: 12,551 [root@osradar ~]#
Step 3: Install GitLab
install GitLab CE Community Edition with theyum command.
# yum install gitlab-ce -y
Package Arch Version Repository Size ==================================================================================================== Installing: gitlab-ce x86_64 11.3.6-ce.0.el7 gitlab_gitlab-ce 416 M
To change the GitLab URL access, edit the ‘/etc/gitlab/gitlab.rb’ file.
sudo vi /etc/gitlab/gitlab.rb
Now change the ‘external_url’ value with your own domain name.
external_url 'http://git.osradar.lan'
Run this command to make this change Permanent and enabel any recent changes.
gitlab-ctl reconfigure
Please allow HTTP and HTTPSÂ ports on the firewall :
# firewall-cmd --permanent --add-service=80/tcp # firewall-cmd --permanent --add-service=443/tcp # systemctl reload firewalld
Step 4:GitLab Post-Installation
Now Lets try to Connect to http://git.osradar.lan and reset  password
You can create users/admins, Edits password , Create news projects, you have a full dashboard so that you can manage all your projects.
Step 5:How to Stop/Start  Gitlab
You can Stop Start Gitlab with the following commands
Start
gitlab-ctl start
Stop
gitlab-ctl stop
Status
gitlab-ctl status
Step 6:How to Backup GitLab on Centos7
The default data backup will be stored in /var/opt/gitlab/backups. You can modify this backup path in /etc/gitlab/gitlab.rb file. If you made changes to the backup configuration, do not forget to run the following command to create the backup.
#gitlab-rake gitlab:backup:create [root@osradar ~]# gitlab-rake gitlab:backup:create Dumping database ... Dumping PostgreSQL database gitlabhq_production ... [DONE] done Dumping repositories ... done Dumping uploads ... done Dumping builds ... done Dumping artifacts ... done Dumping pages ... done Dumping lfs objects ... done Dumping container registry images ... [DISABLED] Creating backup archive: 1539894146_2018_10_18_11.3.6_gitlab_backup.tar ... done Uploading backup archive to remote storage ... skipped Deleting tmp directories ... done done done done done done done done Deleting old backups ... skipping [root@osradar ~]#
Step 7:Using Postfix Configuration
Additional configuration for application email:
GitLab using sendmail to send emails from the application to the users. If you would rather send application email via an SMTP server instead of via Sendmail, then add the following configuration information to /etc/gitlab/gitlab.rb
gitlab_rails['smtp_enable'] = true gitlab_rails['smtp_address'] = "smtp.gmail.com" gitlab_rails['smtp_port'] = 587 gitlab_rails['smtp_user_name'] = "[email protected]" gitlab_rails['smtp_password'] = "my-gmail-password" gitlab_rails['smtp_domain'] = "smtp.gmail.com" gitlab_rails['smtp_authentication'] = "login" gitlab_rails['smtp_enable_starttls_auto'] = true gitlab_rails['smtp_tls'] = false gitlab_rails['smtp_openssl_verify_mode'] = 'peer' # Can be: 'none', 'peer', 'client_once', 'fail_if_no_peer_cert', see http://api.rubyonrails.org/classes/ActionMailer/Base.html
Once edited, dontforget ro re-run the reconfiguration, if you are using local or internal users then just SKIP this step.
$ sudo gitlab-ctl reconfigure
Step 8:Push your First File from Client to the Master
-Create user on GITlab Dashboard
-Create Linux user on The Client machine
-Generate ssh keys and copy the text on id_rsa.pub
-Please copy this text to ssh-key to SSH-key related to the user on the dashboard
-Now try to get your git clone of your created Empty project
-Create README file and push itto the masterÂ
[osradar@osradar ~]$ git clone [email protected]:root/osradarproject.git Cloning into 'osradarproject'... You are not Welcome here ; All you activities are traced warning: You appear to have cloned an empty repository. [osradar@osradar ~]$ ls osradarproject [osradar@osradar ~]$ cd osradarproject/ [osradar@osradar osradarproject]$ vi README.md [osradar@osradar osradarproject]$ git add README.md [osradar@osradar osradarproject]$ git commit -m "add README" [master (root-commit) 1ca4113] add README 1 file changed, 1 insertion(+) create mode 100644 README.md [osradar@osradar osradarproject]$ git push origin master You are not Welcome here ; All you activities are traced Counting objects: 3, done. Writing objects: 100% (3/3), 223 bytes | 0 bytes/s, done. Total 3 (delta 0), reused 0 (delta 0) To [email protected]:root/osradarproject.git * [new branch] master -> master
check on the dashboard
Please enjoy and let us know if we can help
