SSHFS + systemd fails: Invalid argument

electricOzone · September 3, 2019 at 10:55 PM

After installing the LibreELEC network-tools addon, I am able to successfully use the sshfs command in the CLI to mount a remote media directory. However, when attempting to use a systemd unit file to automatically mount the remote folder at boot, I receive an error. I am currently using the same options in unit files on several of my other machines, although they are using slightly newer versions of systemd.

/storage/.config/system.d/storage-videos-Movies.mount

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[Unit]
Description=Mount remote fs with sshfs
Requires=network-online.service
After=network-online.service
Before=kodi.service

[Install]
WantedBy=multi-user.target

[Mount]
What=sshfs_user@server.domain.com:/files/Videos/Movies
Where=/storage/videos/Movies
Type=fuse.sshfs
Options=defaults,x-systemd.automount,_netdev,uid=1000,gid=1000,allow_other,default_permissions,reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user

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systemctl start storage-videos-Movies.mount

systemctl status storage-videos-Movies.mount

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● storage-videos-Movies.mount - Mount remote fs with sshfs
   Loaded: loaded (/storage/.config/system.d/storage-videos-Movies.mount; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2019-09-03 16:43:33 CDT; 4min 51s ago
    Where: /storage/videos/Movies
     What: sshfs_user@server.domain.com:/files/Videos/Movies

Sep 03 16:43:33 LibreELEC systemd[1]: Mounting Mount remote fs with sshfs...
Sep 03 16:43:33 LibreELEC mount[803]: mount: mounting sshfs_user@server.domain.com:/files/Videos/Movies on /storage/videos/Movies failed: Invalid argument
Sep 03 16:43:33 LibreELEC systemd[1]: storage-videos-Movies.mount: Mount process exited, code=exited status=255
Sep 03 16:43:33 LibreELEC systemd[1]: storage-videos-Movies.mount: Failed with result 'exit-code'.
Sep 03 16:43:33 LibreELEC systemd[1]: Failed to mount Mount remote fs with sshfs.

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Running the following command is successful:

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sshfs -o reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user sshfs_user@server.domain.com:/files/Videos/Movies /storage/videos/Movies

**CvH** · September 4, 2019 at 10:57 AM Official Post

Quote from electricOzone

uid=1000,gid=1000

pure guess ?

try to remove as much as possible from "Options" and add one after each other and try to mount it

**vpeter** · September 4, 2019 at 11:00 AM

No, the problem is with Type=fuse.sshfs.

Seems sysetmd doesn't find sshfs correctly. I read somewhere that PATH is not transferred correctly and maybe systemd doesn't find sshfs.

electricOzone · September 4, 2019 at 8:02 PM

Thanks CvH, I meant to remove uid & gid from this config since everything is root on LibreELEC. I also had tried before to remove all extraneous options from the config, but always received the same error.

vpeter, I tried setting Type=auto and removing Type= entirely, but I'm getting the same systemctl status output as before.

Incidentally, if I remove Type= and try the deprecated method of

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What=sshfs#sshfs_user@server.domain.com:/files/Videos/Movies

the output of systemctl status is somewhat different:

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● storage-videos-Movies.mount - Mount remote fs with sshfs
   Loaded: loaded (/storage/.config/system.d/storage-videos-Movies.mount; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2019-09-04 13:57:41 CDT; 2s ago
    Where: /storage/videos/Movies
     What: sshfs#sshfs_user@server.domain.com:/files/Videos/Movies

Sep 04 13:57:41 LibreELEC systemd[1]: Mounting Mount remote fs with sshfs...
Sep 04 13:57:41 LibreELEC mount[561]: mount: mounting sshfs on /storage/videos/Movies failed: No such file or directory
Sep 04 13:57:41 LibreELEC systemd[1]: storage-videos-Movies.mount: Mount process exited, code=exited status=255
Sep 04 13:57:41 LibreELEC systemd[1]: storage-videos-Movies.mount: Failed with result 'exit-code'.
Sep 04 13:57:41 LibreELEC systemd[1]: Failed to mount Mount remote fs with sshfs.

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I can confirm this directory definitely does exist:

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LibreELEC:~ # ls -la /storage/videos/
total 4
drwxr-xr-x    4 root     root          1024 Aug 24 10:51 .
drwxr-xr-x   15 root     root          1024 Sep  3 16:59 ..
drwxr-xr-x    2 root     root          1024 Aug 24 09:26 Movies

electricOzone · September 4, 2019 at 9:07 PM

Furthermore, changing the What= section to

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What=/storage/.kodi/addons/virtual.network-tools/bin/sshfs#[email='sshfs_user@server.domain.com'][/email]:/files/Videos/Movies

gets me one step further as I can actually see LibreELEC enter preauth with the remote server, but it still fails with systemctl status output of read: Connection reset by peer. So I do believe there is some truth to what you're saying about the PATH issues vpeter. However, it appears that something about the unit file is still not being interpreted correctly, as we're seeing the Connection reset by peer message.

electricOzone · September 6, 2019 at 3:37 PM

For the time being, I'm able to get things running by using autostart.sh. I would still prefer to use systemd, but if anyone else is in the same boat as me you should be able to use this method as well.

/storage/.config/autostart.sh

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#!/bin/sh
(sleep 5; \
  sshfs -o allow_other,default_permissions,reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user sshfs_user@server.domain.com:/files/Music /storage/music; \
  sshfs -o allow_other,default_permissions,reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user sshfs_user@server.domain.com:/files/Pictures /storage/pictures; \
  sshfs -o allow_other,default_permissions,reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user sshfs_user@server.domain.com:/files/Videos /storage/videos; \
  sshfs -o allow_other,default_permissions,reconnect,ServerAliveInterval=5,ServerAliveCountMax=3,IdentityFile=/storage/.ssh/id_ed25519_sshfs_user sshfs_user@server.domain.com:/files/zMultimedia /storage/zMultimedia; \  
)&

Should I post about this issue over in bug reports? Should this post be moved there? I'd like to avoid breaking any duplicate post rules

**vpeter** · September 6, 2019 at 4:03 PM

You could still call sshfs directly from systemd script.

**mglae** · September 6, 2019 at 9:51 PM

It is most likely this never will be fixed.

The installed busybox mount does not support mount helper. Therefore the needed mount.fuse is not called for for the fuse.sshfs file system and the mount fails.

Installing mount/unmount from util-linux should solve this. But sshfs will still not work because the binary is part of the addon and not in a standard path.

**vpeter** · September 7, 2019 at 7:33 AM

Some helpers it does have? LibreELEC.tv/busybox-target.conf at master · LibreELEC/LibreELEC.tv · GitHub

**mglae** · September 7, 2019 at 12:42 PM

Yes, but fuse.sshfs has to be split at the dot and

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mount.fuse ... -t sshfs

be called.

There is no code for this.

capntrips · September 10, 2019 at 8:48 AM

As per this, I was able to get the following to work:

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[Unit]
Description=remote external drive share
Requires=multi-user.target network-online.service
After=multi-user.target network-online.service
Before=kodi.service

[Mount]
What=/storage/.kodi/addons/virtual.network-tools/bin/sshfs#le-pi3:/var/media/external
Where=/var/media/test

[Install]
WantedBy=multi-user.target

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Though mount -t /storage/.kodi/addons/virtual.network-tools/bin/sshfs le-pi3:/var/media/external /var/media/test from the CLI after boot and:

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[Mount]
What=le-pi3:/var/media/external
Where=/var/media/test
Type=/storage/.kodi/addons/virtual.network-tools/bin/sshfs

both give me the "No such device" error.

I'm using an ssh config file and haven't done any testing with Options.

This is on a Raspberry Pi 4 (1gb) running 9.1.002.

After typing this, I see you already tried What=/storage/.kodi/addons/virtual.network-tools/bin/sshfs#[host]:[path] in #5, so maybe it has something to do with the fact I'm using an ssh config file and/or not using any Options. I'll run a few tests on my end to see if I can replicate the "read: Connection reset by peer" error.

Edit: As soon as I commented out my ssh config file and added the Options, I started getting the "read: Connection reset by peer" error. I was able to fix it by adding IdentifyFile back to my ssh config file. I should also note that the system doesn't recognize the hostname from the other Pi, so I also had to either use its IP directly or add Hostname back to my ssh config file, or I got the exact same error.

SSHFS + systemd fails: Invalid argument

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