Backups. Everyone's favorite topic.
You've heard it before. You should back your shit up. I'm sure there are a number of reasons why you aren't backing things up.
I've recently been managing a box with a bunch of virtual machines on it. The virtual machines are of the KVM/libvirt kind so you manage them with the command line tool virsh.
The question is how in the hell do you get a "good" backup solution. I came up with this solution but am welcome to hear how you others do it as well.
I signed up for CrashPlan. Mostly because they support Linux and they are relatively cheap. BackBlaze is good but does not support Linux so they are out.
The general strategy is to "snapshot" the partition where you store all your KVM images and then backup that snapshot.
You must be using LVM. Most Ubuntu installs are using it by default. Doing a df -h you should look for stuff like /dev/mapper which is a tell tale sign you are using it:
root@example:/var/kvm# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/example--vg-root 832G 48G 742G 7% /
What I do is snapshot the partition with all the images on it. I then point CrashPlan to it and then run this script every so often:
This script recreates the partition so you get a fresh snapshot. Probably not the best situation but it works for me.