Moving Gitlab and Gitolite server to another machine

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http://serverfault.com – Now, I have gitlab and gitolite running on my ubuntu server. However, this server is too slow and my company wish to move the server to another machine. Are there any way to move gitlab and gitolite server( the whole files, users and setting) to another machine? Installing and creating all users and repositories again would be my last choice. Thank you in advance. (HowTos)