Create snapshot of production

Where is WebGUI ?

root@mjesec:~# vzlist 212005
      CTID      NPROC STATUS  IP_ADDR         HOSTNAME                        
    212005         43 running 193.198.212.5   webgui.rot13.org                

root@mjesec:~# vzquota stat 212005 
   resource          usage       softlimit      hardlimit    grace
  1k-blocks       11474572        20971520       22020096         
     inodes         140595          286527         315180

Create LVM snapshot

root@mjesec:~# lvcreate -s -n vz-snap -L 30g /dev/vg/vz
  Logical volume "vz-snap" created

root@mjesec:~# mkdir /mnt/vz-snap

root@mjesec:~# mount /dev/vg/vz-snap /mnt/vz-snap -o ro

rsync config

[vz-snap]
        comment = /vz read-only snapshot for backup
        path = /mnt/vz-snap
        use chroot = yes
        lock file = /var/lock/rsyncd
        read only = yes
        list = yes
        uid = root
        gid = root
        strict modes = yes
        hosts allow = 10.60.0.201
        ignore errors = no
        ignore nonreadable = no
        transfer logging = no
        timeout = 600
        refuse options = checksum dry-run
        dont compress = *.gz *.tgz *.zip *.z *.rpm *.deb *.iso *.bz2 *.tbz

On development machine

Create webgui-upgrade filesystem for upgrade

root@stage:~# mkdir /mnt/webgui-upgrade

root@stage:~# lvcreate -n webgui-upgrade -L 50G /dev/stage
  Logical volume "webgui-upgrade" created

root@stage:~# mkfs.btrfs /dev/stage/webgui-upgrade 

WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using

fs created label (null) on /dev/stage/webgui-upgrade
        nodesize 4096 leafsize 4096 sectorsize 4096 size 50.00GB

root@stage:~# mount /dev/stage/webgui-upgrade /mnt/webgui-upgrade/

root@stage:~# time rsync -ravH --numeric-ids --sparse 10.60.0.9::vz-snap/private/212005 /mnt/webgui-upgrade/

This takes some time...

sent 1931305 bytes  received 11245927032 bytes  11413351.94 bytes/sec
total size is 11238867558  speedup is 1.00

real    16m25.334s
user    0m48.835s
sys     2m11.820s

root@stage:~# mkdir /mnt/webgui-upgrade/.snap

root@stage:~# btrfsctl -s /mnt/webgui-upgrade/2010-08-05-from-mjesec /mnt/webgui-upgrade/
operation complete
Btrfs Btrfs v0.19

Create LXC configuration

On machine used for testing

dpavlin@t61p:~$ cat /etc/hosts

# webgui-upgrade
10.60.0.246 psihologija.ffzg.hr