[CentOS] NFS Share fails to mount at boot time

Tue Aug 17 15:29:28 UTC 2021
Simon Matter <simon.matter at invoca.ch>

> My suggestion - Add "_netdev" to the parameters list:
>
> 	NAS2HOST:/volume1/export/      /mnt/NAS2 nfs
> _netdev,rw,vers=3,soft,bg,intr        0 0

And, if it doesn't work, try this instead and please let us know which one
worked best:

NAS2HOST:/volume1/export/      /mnt/NAS2 nfs
rw,vers=3,soft,bg,intr,x-systemd.requires=network-online.target 0 0

The 'x-systemd.requires=network-online.target' makes sure that this NFS
mount is _only_ mounted fter a network interface is really online.

And I'm wondering why systemd doesn't do this by default because NFS
mounts are always _only_ possible with an online network.

Can someone explain to me the logic of what systemd does here?

Regards,
Simon

>
> ========
> Bill Gee
>
>
> On Tuesday, August 17, 2021 9:18:53 AM CDT Felix Natter wrote:
>> hello fellow CentOS Users,
>>
>> on Scientific Linux 7 (_very_ similar to CentOS7), I get this when
>> trying to mount NFS Shares (exported from Synology NAS) automatically at
>> boot time:
>>
>> [root at HOST ~]# journalctl -b 0 | grep NAS[20]
>> Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS0...
>> Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS2...
>> Jul 01 13:32:09 HOST systemd[1]: mnt-NAS0.mount mount process exited,
>> code=exited status=32
>> Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS0.
>> Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS0.mount entered failed
>> state.
>> Jul 01 13:32:09 HOST systemd[1]: mnt-NAS2.mount mount process exited,
>> code=exited status=32
>> Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS2.
>> Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS2.mount entered failed
>> state.
>>
>> I read that enabling NetworkManager-wait-online.service can mitigate
>> that, but it's already enabled:
>>
>> [root at HOST ~]# systemctl list-unit-files|grep wait
>> chrony-wait.service                           disabled
>> NetworkManager-wait-online.service            enabled
>> plymouth-quit-wait.service                    disabled
>>
>> /mnt/NAS2 is defined in /etc/fstab (/mnt/NAS0 is mounted analogously):
>>
>> NAS2HOST:/volume1/export/      /mnt/NAS2 nfs     rw,vers=3,soft,bg,intr
>>       0 0
>>
>> This does not always occur, and it seems to be a race condition, because
>> it did not occur a few months ago, before we moved offices (when only
>> the networking changed slightly).
>>
>> Of course, once the computer is booted, I can always mount the shares
>> without problems.
>>
>> Does someone have an idea?
>>
>> Many Thanks and Best Regards,
>>
>
>
>
>
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