Comment 3 for bug 1383741

Despite most frequent reason for filling /var is wrong logrotate config, that already have commited fixes https://bugs.launchpad.net/fuel/+bug/1378327 and https://bugs.launchpad.net/fuel/+bug/1382658
I think this should be escalated to "Critical", because there are very many other reasons why /var can be filled 100%,
e.g. executing these commands by user can fill partition quite quickly
dockerctl backup
fuel snaphost