Same here :)
EDIT: Also, when you are using veeam, backup fails with general error
Failed to connect the NBD server to the hypervisor host
So let's it write here, so others can find it, since I did not google it anywhere, this can be root cause.
Authorized uses only. All activity may be monitored and reported.
channel 2: open failed: connect failed: open failed
your SSH config is likely not suitable for migrating using SSH.
That is due backups are "pushed" into PBS, not scheduled and managed by PBS. PBS works just like storage space, it does not know if job was run or not.
So, now I know why GFS2 is unsupported from proxmox side... It works and performance was also very good, but it breaks after some time (more than half a year). Then it is pain, when everything is stuck and all pve nodes need to be restarted and...