Docker overlay2文件busy，容器不能删除问题解决

在删除docker容器的时候报错,说设备正忙

Error response from daemon: Driver overlay2 failed to remove root filesystem 21852249cce97a1ad5b631ca9f52c81b862d741591e0d337011a28d31992b64f: remove /var/lib/docker/overlay2/1a2b773cc1c55a606b23952dfd2695e49c5924061cb0744fee3e56694bad211e/merged: device or resource busy

通过 docker ps -a 查看有两个状态的dead的容器

解决方法：

1.查看所有挂载的设备

grep docker /proc/*/mountinfo 

2.截取设备的进程id

grep docker /proc/*/mountinfo | grep 1a2b773cc1c55a606b23952dfd2695e49c5924061cb0744fee3e56694bad211e | awk -F':' '{print $1}' | awk -F'/' '{print $3}'

3.清理进程(kill掉即可)

kill -9 $(grep docker /proc/*/mountinfo | grep 1a2b773cc1c55a606b23952dfd2695e49c5924061cb0744fee3e56694bad211e | awk -F':' '{print $1}' | awk -F'/' '{print $3}')