Filesystem Size Used Avail Use% Mounted on
udev 5.9G 0 5.9G 0% /dev
tmpfs 1.2G 9.2M 1.2G 1% /run
/dev/sda1 76G 71G 1.2G 99% /
tmpfs 5.9G 0 5.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 5.9G 0 5.9G 0% /sys/fs/cgroup
RAID-Z1_SkyPool1 15T 1.5T 13T 11% /SkyPool1
tmpfs 5.9G 0 5.9G 0% /tmp
overlay 76G 71G 1.2G 99% /var/lib/docker/overlay2/e718b1b50396ec605db739db336454a2c22c329dd8d9986b2cdc0012d1ceb209/merged
shm 64M 0 64M 0% /var/lib/docker/containers/a68aa45cc45f1a5578caeb9e83f0e2d43d5d6b018d3f1de90d49bfd7f0971e44/shm
df shows overlayfs is using a ridiculously huge amount of space (71 GB). The only containers active are plex, sonarr, radarr, and transmission. Interestingly, vmware shows the vmdk is only 21 GB so I don't understand what is going on. Any ideas on what might be causing this behavior?
I can go back to a snapshot or mount a backup of my vmdk but I don't want to configure docker containers again only to have the same situation occur.