Unraid - 6.12 ZFS, Stopping array did not properly unmount docker

[XtremeOwnage]

May 15 12:21:21 Tower emhttpd: Unmounting disks...
May 15 12:21:21 Tower emhttpd: shcmd (1996844): /usr/sbin/zpool export cache
May 15 12:21:21 Tower root: cannot unmount '/mnt/cache': pool or dataset is busy
May 15 12:21:21 Tower emhttpd: shcmd (1996844): exit status: 1
May 15 12:21:21 Tower emhttpd: Retry unmounting disk share(s)...
May 15 12:21:26 Tower emhttpd: Unmounting disks...
May 15 12:21:26 Tower emhttpd: shcmd (1996846): /usr/sbin/zpool export cache
May 15 12:21:26 Tower root: cannot unmount '/mnt/cache': pool or dataset is busy
May 15 12:21:26 Tower emhttpd: shcmd (1996846): exit status: 1
May 15 12:21:26 Tower emhttpd: Retry unmounting disk share(s)...
May 15 12:21:31 Tower emhttpd: Unmounting disks...
 

 

root@Tower:/mnt# mount | grep cache
/mnt/cache on /mnt/cache type zfs (rw,noatime,xattr,posixacl)
/mnt/cache/system/docker/docker.img on /var/lib/docker type btrfs (rw,noatime,ssd,space_cache=v2,subvolid=5,subvol=/)
/mnt/cache/system/docker/docker.img on /var/lib/docker/btrfs type btrfs (rw,noatime,ssd,space_cache=v2,subvolid=5,subvol=/)
root@Tower:/mnt# umount /var/lib/docker/btrfs/
root@Tower:/mnt# umount /var/lib/docker


Just- a heads up. Was wondering why the array wouldn't stop, after some researching, appears the docker images were still mounted. 

cache = zfs mirrored pool.

[scot]

Same issue here.  If all of the dockers are stopped, it works properly.

 

 

[JorgeB]

Cannot reproduce, post diags in case there's something visible there.

[sasbro97]

Same issue here in 6.12.0-rc6.

 

May 20 00:50:48 Server emhttpd: shcmd (14375): exit status: 1
May 20 00:50:48 Server emhttpd: Retry unmounting disk share(s)...
May 20 00:50:49 Server flash_backup: adding task: /usr/local/emhttp/plugins/dynamix.my.servers/scripts/UpdateFlashBackup update
May 20 00:50:53 Server emhttpd: Unmounting disks...
May 20 00:50:53 Server emhttpd: shcmd (14376): /usr/sbin/zpool export cache
May 20 00:50:53 Server root: cannot unmount '/var/lib/docker/zfs/graph/fbdd434d278a6b358e9f110837ca89f2bba5eff09a3b4cb74f2ed64d8de68e7a-init': unmount failed

[limetech]

17 hours ago, sasbro97 said:

Same issue here in 6.12.0-rc6.

 

May 20 00:50:48 Server emhttpd: shcmd (14375): exit status: 1
May 20 00:50:48 Server emhttpd: Retry unmounting disk share(s)...
May 20 00:50:49 Server flash_backup: adding task: /usr/local/emhttp/plugins/dynamix.my.servers/scripts/UpdateFlashBackup update
May 20 00:50:53 Server emhttpd: Unmounting disks...
May 20 00:50:53 Server emhttpd: shcmd (14376): /usr/sbin/zpool export cache
May 20 00:50:53 Server root: cannot unmount '/var/lib/docker/zfs/graph/fbdd434d278a6b358e9f110837ca89f2bba5eff09a3b4cb74f2ed64d8de68e7a-init': unmount failed

 

Really need to see full diagnostics.  Also please post issues for -rc releases here.

[XtremeOwnage]

On 5/20/2023 at 10:58 AM, limetech said:

 

Really need to see full diagnostics.  Also please post issues for -rc releases here.

The next time this issue reproduces, I'll grab diagnostics for ya. It seems to be a non-consistent issue.

[bubbadrk]

I had the same issue. Stopped all containers and turned off Docker to edit network settings and when I attempted to start docker again it could not because the image was already mounted. I could not find support online so I rebooted, it could not unmount the share with my docker image and eventually had an unclean shutdown and reboot. Not very useful without my diagnostics but figured I would also chime in. I am on the latest release 6.12.2.

[david279]

try the 6.12.3rc3 it has fixes for docker not stopping....

[bubbadrk]

Just saw .3 released tonight. Will update tomorrow.