Found while looking into T170521: deployment-logstash2 out of disk space
$ ssh deployment-kafka01.eqiad.wmflabs df -h Filesystem Size Used Avail Use% Mounted on udev 10M 0 10M 0% /dev tmpfs 401M 41M 361M 11% /run /dev/vda3 19G 19G 0 100% / tmpfs 1003M 0 1003M 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 1003M 0 1003M 0% /sys/fs/cgroup