一、运行容器报错：Error response from daemon: Error running DeviceCreate (createSnapDevice) dm_task_run failed

metadata目录在 docker info查看

service docker stop

thin_check /var/lib/docker/devicemapper/devicemapper/metadata

thin_check --clear-needs-check-flag /var/lib/docker/devicemapper/devicemapper/metadata

service docker start

二、Error running DeviceCreate (ActivateDevice) dm_task_run failed

重启docker服务器后 遇到 ‘device or resource busy’错误
如果有container在运行的时候重启 docker 服务， 可能会导致 container无法启动， 错误信息类似于

Error response from daemon: Cannot start container zookeeper: Error getting container ddf1dd91bbf46dc648268327f8f7c6fffaf2f19cda5cf1d97fdc701016d4332c from driver devicemapper: Error mounting '/dev/mapper/docker-8:1-525372-ddf1dd91bbf46dc648268327f8f7c6fffaf2f19cda5cf1d97fdc701016d4332c' on '/var/lib/docker/devicemapper/mnt/ddf1dd91bbf46dc648268327f8f7c6fffaf2f19cda5cf1d97fdc701016d4332c': device or resource busy  
2015/01/26 04:42:07 Error: failed to start one or more containers

或者

d2859bd1f84b: Error pulling image (latest) from xxxxxx, Driver devicemapper failed to create image rootfs e6158e7962db43274de40fc3db65ad64811d43fe342dea633df20639f5a4e3cd: device e6158e7962db43274de40fc3db65ad64811d43fe342dea633df20639f5a4e3cd already exists 43fe342dea633df20639f5a4e3cd already exists c049b2b: Download complete  
e6158e7962db: Error downloading dependent layers

这是一个Docker的 bug ，解决方式是先找出没有umount的路径

cat /proc/mounts | grep "mapper/docker" | awk '{print $2}'

然后依次

umount

三、[8] System error: fork/exec /usr/bin/docker: cannot allocate memory问题

The fix for me was to add swapspace. By default my digitalocean droplet didn’t come with any swap!

dd if=/dev/zero of=/root/myswapfile bs=1M count=1024

chmod 600 /root/myswapfile

mkswap -f /root/myswapfile

swapon /root/myswapfile

四、 防火墙变动异常

一般异常为

Error response from daemon: Cannot start container web: iptables failed: iptables -t nat -A DOCKER -p tcp -d 0/0 --dport 32797 -j DNAT --to-destination 172.17.0.30:5000 ! -i docker0: iptables: No chain/target/match by that name.

五、解决办法：重建docker0网络恢复

关闭当前防火墙

service iptables stop

重启docker重新建立防火墙规则

service docker restart

根据需求启停容器

docker restart[stop] 容器号