Re: [owl-users] VZ container migration

On Sat, Dec 18, 2010 at 10:21:26AM +0300, gremlin_at_private wrote:
> Backup your containers in Proxmox:
> 0. vzctl stop 1234
> 1. tar -C /path/to/ve/roots/1234 -czf ve-1234-`date +%Y%m%d`-backup.tgz .
> 2. cp /etc/vz/conf/1234.conf .
> 
> Then transfer these two files to Owl server and restore them:
> 4. mkdir -p /new/path/to/ve/roots/1234
> 5. tar -C /new/path/to/ve/roots/1234 -xzf ve-1234-*-backup.tgz
> 6. cp 1234.conf /etc/vz/conf/
> 7. Edit /etc/vz/conf/1234.conf if necessary
> 8. vzctl start 1234
> 
> (Of course, you have to edit commands as necessary)

A minor correction: the options to tar when creating the archive should
preferably include "S" ("handle sparse files efficiently"), and when
extracting the archive they should include "p" ("extract all protection
information") and "--numeric-owner" (don't try to resolve user and group
names stored in the tarball using the new host system's /etc/passwd
entries, which are not valid for the container's system being restored).
So the commands may be like:

tar -C /vz/private -cSf 1234.tar 1234

and:

tar -C /vz/private --numeric-owner -xpf 1234.tar

It is also possible to avoid creating this temporary tarball, such as by
running tar-over-ssh.

Alexander