lxc containers on zfs storage wont start.

[kroem]

This is not a default configuration. First thing which caught my eye is the fact that you're using a case insensitive subvolume there. This has shown to be problematic in the past (in particular in combination with AppArmor[1]). So maybe try:

# zfs set casesensitivity=sensitive vol1/VM/subvol-200-disk-1

Then try to start the container.

Now, there are a couple of other options which seem weird, particularly for a container rootfs: sharesmb, normalization, sharenfs, nbmand.
Ideally you'd disable all of those on `vol1/VM` and only enable them on specific subvolumes where you need them.

[1] https://github.com/zfsonlinux/zfs/issues/4763

Hi! Yes, that worked - I created a new zpool with casesensitivity=sensitive and it's working. Thank you mucg for your help.

However, I am unable to set the parameter on the existing zpool, which is a little "sad":

root@cat:~# zfs set casesensitivity=sensitive vol1/VM/subvol-200-disk-1
cannot set property for 'vol1/VM/subvol-200-disk-1': 'casesensitivity' is readonly