System low on space (docker): test-ibmcloud-rhel7-x64-1

[sxa]

• Please put the system name in the title of this issue test-ibmcloud-rhel7-x64-1

• Link to any log file showing the problem: Flagged by Nagios as having <10GB of space, although I've cleaned up a 4GB

• Please describe the issue:

/var/lib/docker is consuming 52GB of space. Docker system df does not show a significant amount in use:

TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          4         0         2.264GB   2.264GB (100%)
Containers      0         0         0B        0B
Local Volumes   1         0         6.508MB   6.508MB (100%)
Build Cache     15        0         0B        0B

There are lots of directories under /var/lib/docker/overlay2 which areup to 1GB in size so it's not one individual container or image that is causing a problem here.

[sxa]

Issued the following to recover it:

systemctl stop docker
rm -rf /var/lib/docker
systemctl start docker