Error response from daemon: Error running DeviceCreate (createSnapDevice) dm_task_run failed

解决办法：

# systemctl stop docker.service
# thin_check /var/lib/docker/devicemapper/devicemapper/metadata
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如果还有问题，则：

# thin_check --clear-needs-check-flag /var/lib/docker/devicemapper/devicemapper/metadata
# systemctl start docker.service
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