Cannot destroy container 6fa48f713bc5: Device is Busy

[root@iZbp13ks1ssevb4354g66kZ ~]# docker rm 6fa48f713bc5
Error response from daemon: Cannot destroy container 6fa48f713bc5: Driver devicemapper failed to remove root filesystem 6fa48f713bc54dc3feaa78f01902066a6c0fc77e56772f7fb51a2ffce4f7291e: Device is Busy
Error: failed to remove containers: [6fa48f713bc5]

  docker 容器在非正常情況下關閉，容易引起異常，導致重啓、刪除容器都會拋出異常 “Device is Busy”

  查詢docker掛載目錄

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

[root@iZbp13ks1ssevb4354g66kZ ~]# cat /proc/mounts | grep "mapper/docker" | awk '{print $2}'
/var/lib/docker/devicemapper/mnt/6fa48f713bc54dc3feaa78f01902066a6c0fc77e56772f7fb51a2ffce4f7
/var/lib/docker/devicemapper/mnt/e45626153600171af0117d9f2e0a9d8dbebfc5564d78a3186f64144d8a87

  卸載 6fa48f713bc5 容器掛載目錄

[root@iZbp13ks1ssevb4354g66kZ ~]# umount /var/lib/docker/devicemapper/mnt/6fa48f713bc54dc3feaa78f01902066a6c0fc77e56772f7fb51a2ffce4f7291e

刪除容器

[root@iZbp13ks1ssevb4354g66kZ ~]# docker rm 6fa48f713bc5
6fa48f713bc5