Docker was Hungry!
Two days ago Docker just decided it was really hungry and began to eat up a lot of disk space. Finally I noticed because some container complained about having no disk space left to run a shell command. 0 bytes to be specific.
Shortly after other programs complained about disk space and some of them stopped working. together with Sheogorath we investigated the problem and he found out that the storage driver
aufs I was using could cause problems - as mentioned on stackoverflow.
I’m running arch-based Manjaro linux so I looked up the arch wiki pages on the topic and configured my docker installation to use
overlay2 instead. Was it really that easy? Of course not.
Actually I first issued the command
$ df -h to get something like this:
Filesystem Size Used Avail Use% Mounted on dev 5,9G 0 5,9G 0% /dev run 5,9G 1,7M 5,9G 1% /run /dev/sda2 221G 221G 0,0G 100% / tmpfs 5,9G 153M 5,7G 3% /dev/shm tmpfs 5,9G 0 5,9G 0% /sys/fs/cgroup tmpfs 5,9G 44M 5,8G 1% /tmp /dev/sda1 300M 256K 300M 1% /boot/efi tmpfs 1,2G 60K 1,2G 1% /run/user/1000
Then I typed
$ du -sbh /var/lib/docker/aufs which gave me
114 GB /var/lib/docker/aufs/ as a result and there it was - the hungry space eater!
I removed docker and remaining files, installed it again and configured it to use