Install Gitlab Community in CentOS 7 [24-09-2019]

Update your CentOS system-
==========================
  sudo yum install epel-release -y && sudo yum update kernel -y && sudo yum update -y && sudo yum upgrade -y && sudo yum install nano net-tools git wget -y && sudo reboot -h now

Ading a User with sudo access-
==============================
  adduser [username] && usermod -aG wheel [username] && passwd [username] && exit

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Details can be found in here- https://www.howtoforge.com/tutorial/how-to-install-and-configure-gitlab-ce-on-centos-7/
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Install-
========

Required Packages-
------------------

  sudo yum -y install curl policycoreutils openssh-server openssh-clients postfix && sudo systemctl start sshd && sudo systemctl start postfix && sudo systemctl enable sshd && sudo systemctl enable postfix

Install GitLab-
---------------

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

======= (Optional) =======
Install SSL-
------------
  sudo yum -y install letsencrypt && sudo letsencrypt certonly --standalone -d <your_website_like_doc.bcc.gov.bd> && sudo mkdir -p /etc/letsencrypt/live/<doc.bcc.gov.bd> && sudo mkdir -p /etc/gitlab/ssl/ && sudo openssl dhparam -out /etc/gitlab/ssl/dhparams.pem 2048 && sudo chmod 600 /etc/gitlab/ssl/* 
==========================

Configure GitLab URL-
---------------------

  sudo nano /etc/gitlab/gitlab.rb && sudo gitlab-ctl reconfigure

And update `external_url 'http://......'` with this-

===================================================================================
external_url 'https://doc.bcc.gov.bd'

nginx['redirect_http_to_https'] = true
nginx['ssl_certificate']     = "/etc/letsencrypt/live/doc.bcc.gov.bd/fullchain.pem"
nginx['ssl_certificate_key'] = "/etc/letsencrypt/live/doc.bcc.gov.bd/privkey.pem"
nginx['ssl_dhparam']         = "/etc/gitlab/ssl/dhparams.pem"
===================================================================================


##Configure Firewalld-
----------------------

  sudo yum -y install firewalld && sudo systemctl start firewalld && sudo systemctl enable firewalld && sudo firewall-cmd --permanent --add-service ssh && sudo firewall-cmd --permanent --add-service http && sudo firewall-cmd --permanent --add-service https && sudo firewall-cmd --reload && sudo firewall-cmd --list-all && curl localhost