integration-puppetmaster has a /var of only 1.9GB and most of it is filled up with:
Looking at the disk usage graphs, one can see it has close to 0 free space and is constantly going up and down every few hours.
It going up is puppet runs writing yaml files to /var/lib/puppet/reports. It going down is the the cleanup cronjob running.
I ran it manually once to delete beyond past 2 hours instead of past 36 hours and it shrank from 1.2G to 115M for /var/lib/puppet.