I’m facing an issue with Docker 1.9.1 under CentOS 7. I cannot start the docker daemon because it fails to set up the storage.
This server worked for more than a year using the devicemapper on the same disk as the system (this is a test server so I didn’t define any specific storage). But now, when it starts, docker-storage-setup want to create a logical volume on the same volume group as the system, and of course there no more space available. I don’t understand why it can no more use the same storage under /var/lib/docker as it did until now. In addition there’s still some disk space available in /var/lib/docker.
Here are some details:
# /usr/bin/docker-storage-setup Rounding up size to full physical extent 24.00 MiB Volume group "system" has insufficient free space (1 extents): 6 required.
(this is normal as the VG system is using the whole disk space)
# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/system-vg00 23049220 12779416 10269804 56% / devtmpfs 1930828 0 1930828 0% /dev tmpfs 1941412 0 1941412 0% /dev/shm tmpfs 1941412 8668 1932744 1% /run tmpfs 1941412 0 1941412 0% /sys/fs/cgroup /dev/sda1 1002316 267456 682280 29% /boot tmpfs 388284 0 388284 0% /run/user/1000
(as you see there still some disk space available for /var/lib/docker)
# cat /etc/sysconfig/docker-storage DOCKER_STORAGE_OPTIONS=
(and nothing tells docker to use a new logical volume)
Any idea why this appeared ?
Thanks for your attention,