Recover GitLab from filesystem backup

Install new instance/node before proceeding 

Install gitlab on server and move postgres DB as backup (Steps bellow for ubuntu)

curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash
apt-get install gitlab-ce
gitlab-ctl reconfigure
gitlab-ctl stop
mv /var/opt/gitlab/postgresql/data /root/

Transfer backup

rsync -vaopHDS --stats -P /backup/old-git.server.com/etc/gitlab/gitlab.rb root@new-git.server.com:/etc/gitlab/gitlab.rb
rsync -vaopHDS --stats -P /backup/old-git.server.com/etc/gitlab/gitlab-secrets.json root@new-git.server.com:/etc/gitlab/gitlab-secrets.json
rsync -vaopHDS --stats --ignore-existing -P /backup/old-git.server.com/var/opt/gitlab/postgresql/* root@new-git.server.com:/var/opt/gitlab/postgresql
rsync -vaopHDS --stats --ignore-existing -P /backup/old-git.server.com/var/opt/gitlab/git-data/repositories/* root@new-git.server.com:/var/opt/gitlab/git-data/repositories

Restart/reconfigure gitlab services

gitlab-ctl upgrade
gitlab-ctl reconfigure
gitlab-ctl restart

Reinstall gitlab runner (OPTIONAL)

curl -L --output /usr/local/bin/gitlab-runner https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64
useradd --comment 'GitLab Runner' --create-home gitlab-runner --shell /bin/bash
gitlab-runner install --user=gitlab-runner --working-directory=/home/gitlab-runner

apt install docker.io
systemctl start docker
systemctl enable docker
usermod -aG docker gitlab-runner

gitlab-runner register