报错信息：failed to register layer: devmapper: Thin Pool has 105881 free data blocks which is less than minimum required 163840 free data blocks. Create more free space in thin pool or use dm.min_free_space option to change behavior
Original http://stackoverflow.com/questions/36918387/space-issue-on-docker-devmapper-and-centos7
solution:
The first step Cleanup exited processes:
docker rm $(docker ps -q -f status=exited)
Step 2: Cleanup dangling volumes:
docker volume rm $(docker volume ls -qf dangling=true)
The third step Cleanup dangling images:
docker rmi $(docker images --filter "dangling=true" -q --no-trunc)
If it still doesn't work :
delete the working directory (may cause data loss, the pro-test is effective) rm -rf /var/lib/docker/*
// reload configuration file
systemctl daemon-reload
// restart docker
systemctl restart docker.service