ZFS Pool and LXC Root Disk

[perryflynn]

Hello there,

i try to create a LXC container into a ZFS Pool.

Output:

mounting container failed
TASK ERROR: cannot open directory //myraidz: No such file or directory

The name of the selected ZPool is myraidz/machines.
Same problem on restore a backup into the ZPool.

Any ideas?

Greetings
Christian

 

[dietmar]

Why isn't it mounted at /myraidz/machines? Proxmox VE expects the volumes to be mounted at the standard zfs mount points.

 

[perryflynn]

Ah okay, KVM Machines working without mounting the volume. I expected for LXC the same.

# zfs list
NAME                                         USED  AVAIL  REFER  MOUNTPOINT
myraidz                                     3.03T  12.3T   140K  none
myraidz/files                               2.19T  12.3T  2.19T  /media/files
myraidz/machines                             866G  12.3T   140K  none
myraidz/machines/vm-100-disk-1               516G  12.7T   114G  -
myraidz/machines/vm-101-disk-1              66.0G  12.3T  4.64G  -
myraidz/machines/vm-102-disk-1              66.0G  12.3T  33.5G  -
myraidz/machines/vm-103-disk-1              66.0G  12.3T  44.2G  -
myraidz/machines/vm-105-disk-1               143G  12.4T  11.4G  -
myraidz/machines/vm-105-state-AfterInstall  8.76G  12.3T  5.20G  -

I have created a test subvolume. Now its working as expected.
Thanks!

myraidz/lxcmachines                          633M  12.3T   140K  /myraidz/lxcmachines

 

[fabian]

ZFS has two fundamental types of datasets - zvols and filesystems. VMs use zvols (which do not contain a ZFS filesystem, but are passed as block devices to the VMs), containers use ZFS filesystem datasets directly. zvols don't get a mountpoint in ZFS (but can be formatted and mounted by the operating system just like any other block device).

 

[perryflynn]

Thanks for the explanation!