I have a few servers which are running Debian 6 (Squeeze) which uses OpenVZ to run containers. The containers are some Debian 6 and some Debian 7.
Squeeze was the last version of Debian to support OpenVZ, for the next versions, users are recommended to run LXC containers.
I was holding off this, but Squeeze recently went EOL. And now I'm kinda cornered, because I don't know an easy path to upgrade.
I have no High-Availability, and machines are running on it 24/7, I can't expect too much downtime (such as setting up LXC on another machine and copying them over).
I was wondering if anyone have done this upgrade, I'm thinking of setting up LXC to work on Debian Squeeze together with OpenVZ, so I can start my containers on the same folder and machine as OpenVZ, but with LXC, so when all machines are running via LXC, I then proceed to upgrade the Debian version to 7 and 8 after.
Has anyone ever done this? Do you guys recommend what am I going to do?