Mount path /tmp is not canonical (contains a symlink).

qnap2omv · 5. November 2022

Code

Nov 05 12:30:57 omv systemd[1]: tmp.mount: Failed to run 'mount' task: Too many levels of symbolic links
Nov 05 12:30:57 omv systemd[1]: tmp.mount: Failed with result 'resources'.

and

The unit tmp.mount has entered the 'failed' state with result 'resources'.
Nov 05 12:39:02 omv systemd[1]: Failed to mount Mount /tmp as tmpfs to reduce write access to the root device.

Yeah - I know.

/tmp -> /var/tmp

and /var is mounted on its own device

Code

/dev/sda         122548168     6651820   115879964   6% /var

So I believe I know better than OMV and would like it to accept/swallow my design choice without constantly falling on its face when applying configuration.

HowTo?

ryecoaaron · 5. November 2022

Zitat von qnap2omv

So I believe I know better than OMV and would like it to accept/swallow my design choice without constantly falling on its face when applying configuration.

OMV makes sure to use tmpfs for /tmp. I don't see any way to disable that. You could delete /srv/salt/omv/deploy/systemd/20tmp.sls but it would come back with every omv update. /tmp isn't a symlink on my systems. Both /tmp and /var/tmp are using tmpfs though. How did you install OMV? Why do you do want /tmp on a regular device?

$ grep /tmp /proc/mounts

tmpfs /tmp tmpfs rw,relatime,inode64 0 0

folder2ram /var/tmp tmpfs rw,relatime,inode64 0 0

qnap2omv · 5. November 2022

Zitat von ryecoaaron

OMV makes sure to use tmpfs for /tmp. I don't see any way to disable that. You could delete /srv/salt/omv/deploy/systemd/20tmp.sls but it would come back with every omv update. /tmp isn't a symlink on my systems. Both /tmp and /var/tmp are using tmpfs though. How did you install OMV? Why do you do want /tmp on a regular device?

I installed OMV around version 3 or so and updated incrementally.
Usually I use tmpfs too if the machine has enough memory.

As for the why:

1) the machine has only 8GB and I didn't want to cut off any more of that than necessary
2) I have a separate 128GB SSD for /var so why not use that?

I'll try to hack /srv/salt/omv/deploy/systemd/20tmp.sls in a way it doesn't keep coming back.

ryecoaaron · 5. November 2022

Zitat von qnap2omv

the machine has only 8GB and I didn't want to cut off any more of that than necessary

The only machine I have ever worried about too much tmpfs on had 512mb of ram.

Zitat von qnap2omv

I have a separate 128GB SSD for /var so why not use that?

Hope it is decent quality with wear leveling. Otherwise it won't last long replacing tmpfs.

Zitat von qnap2omv

I'll try to hack /srv/salt/omv/deploy/systemd/20tmp.sls in a way it doesn't keep coming back

You might have to clear the salt cache the first time you remove it and possibly every time it somehow comes back.

qnap2omv · 5. November 2022

Zitat von ryecoaaron

The only machine I have ever worried about too much tmpfs on had 512mb of ram.
Hope it is decent quality with wear leveling. Otherwise it won't last long replacing tmpfs.

Maybe you use /tmp differently than I do.

The SSD has worked for over 4 years - I'll stick with the turkey fallacy for now.

By the way: Do you know why I started using OMV (see nickname)? Because I hoped for a NAS that didn't try to outsmart its users.

It has worked very well so far. Would be a pity if that changed.

ryecoaaron · 5. November 2022

Zitat von qnap2omv

Maybe you use /tmp differently than I do.

Obviously. I use it for ephemeral files. What do you use it for?

Zitat von qnap2omv

Do you know why I started using OMV (see nickname)? Because I hoped for a NAS that didn't try to outsmart its users.
It has worked very well so far. Would be a pity if that changed.

OMV has been setting up /tmp as tmpfs since the very beginning (0.2). So, definitely not doing something new. I honestly don't know how this is outsmarting its users. If you are using /tmp for something that can't be used in tmpfs, it seems like a something that is not a typical NAS workload.

Mount path /tmp is not canonical (contains a symlink).

Jetzt mitmachen!

Tags