手动备份：
gitlab-rake gitlab:backups:create
定时备份：
sudo vim /etc/crontab
重启crond服务
sudo systemctl restart crond
当前停止gitlab服务，然后重启
sudo gitlab-ctl stop
shutdown -r now
设置定时清理即可
sudo vim /etc/gitlab/gitlab.rb
gitlab_rails['manage_backup_path'] = true #管理备份路径
gitlab_rails['backup_path'] = "/var/opt/gitlab/backups" #路径地址
gitlab_rails['backup_archive_permissions'] = 0644 #权限存档
gitlab_rails['backup_keep_time'] = 7776000 #备份保留时间：3个月