LXC with fuse-overlayfs won't replicate or backup (hangs at freeze)

[bladux]

Hello,

I'm having an issue with my LXC guests using fuse-overlayfs (docker storage): they can't be either replicated (ZFS replication between nodes) nor backed up over my NAS (NFS share).
The container freezes and will never resume its frozen state.

I'm runing the latest 7.0 : pve-manager/7.0-11/63d82f4e (running kernel: 5.11.22-4-pve)

Anyone ever came into this ?

Best regards

 

[bladux]

Here are the logs of a backup:

INFO: Starting Backup of VM 1329 (lxc)
INFO: Backup started at 2021-09-29 00:22:32
INFO: status = running
INFO: CT Name: mycontainername
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
interrupted by signal
snapshot create failed: starting cleanup

I had to stop the task to unfreeze it

 

[fabian]

fuse file systems inside the container can interfere with the freezer functionality of the kernel that is used to ensure snapshot consistency. see https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pct_container_storage

 

[tuxillo]

Is there a solution for this?

If you're using ZFS and with aufs gone, your only choice seems to use fuse-overlayfs but then you can't backup the LXC or use ZFS replication, can you even migrate LXCs?

 

[tabnul]

Is there a solution for this?

If you're using ZFS and with aufs gone, your only choice seems to use fuse-overlayfs but then you can't backup the LXC or use ZFS replication, can you even migrate LXCs?

have you tried the ' native ' snapshotter? works here with k3s/containerd and i can replicate my zfs hosted lxc container.

by the way i can confirm your issue, container frozen after testing with fuse-overlayfs and setting up a replication...

 

[mac.linux.free]

have you tried the ' native ' snapshotter? works here with k3s/containerd and i can replicate my zfs hosted lxc container.

by the way i can confirm your issue, container frozen after testing with fuse-overlayfs and setting up a replication...

same issue here...but replication works, backup not.

 

[dlasher]

same issue. Can't snapshot LXC containers with FUSE enabled. -- there has to be a better way --