[PVE-User] Problems with backup process and NFS

[Fabian Grünbichler]

On Fri, May 19, 2017 at 11:26:35AM +0200, Uwe Sauter wrote:
> Hi Fabian,
> 
> thanks for looking into this.
> 
> As I already mentioned yesterday my NFS setup tries to use TCP as much as possible so the only UDP port used / allowed in the NFS
> servers firewall is udp/111 for Portmapper (to allow showmount to work).
> 
> >> Issue 1:
> >> Backups failed tonight with "Error: mount error: mount.nfs: /mnt/pve/aurel is busy or already mounted".
> >>
> >> Question 1:
> >> Do NFS shares that should be used for backups need to be "disabled" so that the backup process just mount the share in preparation
> >> of the backup? If so, there is a problem with the WebUI as I cannot select a disabled storage location when defining or editing a
> >> backup job.
> >>
> > 
> > no. I think your NFS share is (wrongly) detected as unmounted, since
> > activate_storage in the NFS plugin will try to mount if nfs_is_mounted
> > returned undef. in general activate_storage is supposed to detect if the
> > storage is already activated and turn into a no-op if needed, and
> > calling storage can treat it as idempotent.
> > 
> > what does "grep aurel /proc/mounts" say on this machine?
> 
> # grep aurel /proc/mounts
> <ip of server>:/backup/proxmox-infra /mnt/pve/aurel nfs
> rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=<ip of
> server>,mountvers=3,mountport=892,mountproto=tcp,local_lock=none,addr=141.58.1.15 0 0

that looks okay..

> 
> > 
> >>
> >> Issue 2:
> >> When the backup process failed no email was sent to the specified address though email notification mode is set to "always".
> >> Emails in general do work, at least apticron sends update notifications and sending mails from CLI also works.
> >>
> >> Question 2a:
> >> Why was no email sent after the backup process failed?
> >>
> > 
> > can you post the complete log?
> 
> Where can I find that?

check the node's task history - should have an entry for the backup job
including log.

> 
> > 
> >> Question 2b:
> >> Does the WebUI use a different method for sending emails? If so where can this be configured?
> > 
> > different from what?
> > 
> 
> Different from what apticron and "echo test | mail -s test <recipient address>" use.
> 

there is /root/.forward which points to pvemailforward which uses
"sendmail -bm -N never -f <FROM> <TO>" (using 'root' or the value from
datacenter.cfg as sender, and the adress of 'root at pam' as recipient),
and PVE::Tools::sendmail() (which is used by vzdump) which uses
"sendmail -B 8BITMIME -f <FROM> <TO>" (with configurable sender and
recipient). vzdump sets the sender to the one from datacenter.cfg as
well, and the recipient to what is configured for the backup job.