Migrate from 6.0.1 source install to new server omnibus 8 latest

Hello
We have a source compiled postgresql backend gitlab with version 6 and a lot of projects .
We dont want to upgrade the dirty install and try to migrate all data to new server
A: We transfer all repositories and do a rake import repos import db manually adding ldap authentication again but users and group we dont know what do to with them so we go to plan B
B: We create a backup using bundle in old server transfer it to new one and rake backup:restore give us
DEBUG – : ** [Raven] Event not sent due to excluded environment: production
rake aborted!
Don’t know how to build task ‘backup:restore’

I searched before so many times in stackoverflow here and see others instructions but we dont want to take the risk and upgrade the old one .

any solutions ?

thank you

@Ara4Sh The task is called gitlab:backup:restore rather than backup:restore so if the new setup uses omnibus it is supposed to be sudo gitlab-rake gitlab:backup:restore

To view all available rake tasks on omnibus, just use the following command:

• sudo gitlab-rake -T

Additional points:

• Always ensure that you restore to a similar version that you used to create the dump with i.e. If there is a GitLab version mismatch between your backup tar file and the installed version of GitLab, the restore command will abort with an error. Install a package for the required version and try again.

• The simplest way would be to install an exact version of your live server on your test server i.e. 6.0.1, follow the following guide to update to 7.14: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/update/6.x-or-7.x-to-7.14.md

• Then from there change to omnibus using the steps outlines here: http://doc.gitlab.com/omnibus/update/README.html#upgrading-from-a-non-omnibus-installation-to-an-omnibus-installation and then do sudo apt-get update && sudo apt-get upgrade gitlab-ce then you are on the latest stable version

Thank you

Im thinking about another way to upgrade :
Creating a new machine install omnibus 6.0.1 - restore source installation backup and then upgrade through deb .

but how can i find omnibus 6.0.1 is package exist ?

GitLab was first shipped using OmniBus on 6.6, see https://about.gitlab.com/2014/02/14/gitlab-is-now-simple-to-install/

So you have to install 6.0.1 from source, then follow this guide: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/update/6.x-or-7.x-to-7.14.md that allows you to quickly update from 6.^ to 7.14.

From 7.14, shift to omnibus and then use the package manager to update && upgrade GitLab