[root@localhost ~]# gitlab-rake gitlab:backup:create
Dumping database ... 
Dumping PostgreSQL database gitlabhq_production ... [DONE]
done
Dumping repositories ...
 * newgroup/test ... [SKIPPED]
 * newgroup/test.wiki ...  [SKIPPED]
 * zhangsan/zsproject ... [SKIPPED]
 * zhangsan/zsproject.wiki ...  [SKIPPED]
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: 1521890768_2018_03_24_10.6.0_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@localhost ~]# ls /var/opt/gitlab/backups
1521890768_2018_03_24_10.6.0_gitlab_backup.tar

[root@localhost ~]# gitlab-ctl stop unicorn
ok: down: unicorn: 0s, normally up
[root@localhost ~]# gitlab-ctl stop sidekiq
ok: down: sidekiq: 0s, normally up

[root@localhost ~]# gitlab-rake backup:restore BACKUP=1521890768_2018_03_24_10.6.0
rake aborted!
Don't know how to build task 'backup:restore' (see --tasks)
/opt/gitlab/embedded/bin/bundle:23:in `load'
/opt/gitlab/embedded/bin/bundle:23:in `<main>'
(See full trace by running task with --trace)

mkdir /var/opt/gitlab/backups

chown git /var/opt/gitlab/backups

chmod 700 /var/opt/gitlab/backups