systemd mount unit using sshfs not mounting on login

Ninguém · 07-03-2022, 05:26 AM

I am trying to mount dir projects using sshfs on login.
My key does use a passphrase that I cache using gnome-keyring.
Here is my mount unit (srv-projects.mount):

Code:

[Unit]
Description=projects
After=gnome-keyring-daemon.service

[Mount]
What=%u@host:/srv/projects
Where=/srv/projects
Type=fuse.sshfs
Options=ServerAliveInterval=45,ServerAliveCountMax=2,reconnect,noatime

[Install]
WantedBy=default.target

The unit fails on login whith the following error messages:

Code:

srv-projects.mount: Failed with result 'exit-code'.
Failed to mount projects.

But if i, then, try starting the unit, it does mount with no errors.
What am I doing wrong?

Distro: Debian

teckk · 07-03-2022, 09:34 AM

Basic info:
https://wiki.archlinux.org/title/SSHFS#On_boot

Ninguém · 07-03-2022, 09:46 AM

Thank you, but I don't want to mount at boot time. I want to mount it at login.
Besides I should not need to be root (the intended behavior is to have it run as a regular user with no right to mess around with fstab).
When I issue the command:

Code:

$ systemctl --user start srv-projects.mount

afterwords, it does work. I just didn't want to have to do that every time.

teckk · 07-03-2022, 10:20 AM

Write a script then. Either run that script or have that script run at user login.

What distribution are you using? Either look at your docs for help on systemd units, or
https://www.digitalocean.com/communi...and-unit-files
https://man.archlinux.org/man/systemd.unit.5
https://unix.stackexchange.com/quest...ipt-in-systemd
https://stackoverflow.com/questions/...-a-bash-script

Which is what you are attempting in post #1.

Ninguém · 07-03-2022, 01:54 PM

I have been running trough your links but I am not able to get any hints!
Edited the first post to mention the distro (Debian).

michaelk · 07-05-2022, 05:12 PM

Quote:

Besides I should not need to be root (the intended behavior is to have it run as a regular user with no right to mess around with fstab).

Yet you need to be root (or via sudo) to create the systemd mount service so that does not make much sense.

Depends on distribution and shell you are running but with bash you can add the sshfs command to mount in the ~/.bashrc for login and the unmount (fusermount) command to the users ~/.bash_logout file.

evo2 · 07-05-2022, 05:29 PM

Quote:

Originally Posted by michaelk

Yet you need to be root (or via sudo) to create the systemd mount service so that does not make much sense.

Really? OP already stated that if the unit is started manually it works.

evo2 · 07-05-2022, 05:40 PM

Quote:

Originally Posted by Ninguém

I am trying to mount dir projects using sshfs on login.
My key does use a passphrase that I cache using gnome-keyring.
Here is my mount unit (srv-projects.mount):

Code:

[Unit]
Description=projects
After=gnome-keyring-daemon.service

[Mount]
What=%u@host:/srv/projects
Where=/srv/projects
Type=fuse.sshfs
Options=ServerAliveInterval=45,ServerAliveCountMax=2,reconnect,noatime

[Install]
WantedBy=default.target

The unit fails on login whith the following error messages:

Code:

srv-projects.mount: Failed with result 'exit-code'.
Failed to mount projects.

But if i, then, try starting the unit, it does mount with no errors.
What am I doing wrong?

Distro: Debian

My guess is that "After=gnome-keyring-daemon.service" is not sufficient to ensure that the keyring has been unlocked. I would suggest looking into how to increase verbosity: eg add options

Code:

ssh_command=ssh\040-vv,sshfs_debug,debug

And then checking

Code:

journalctl -u srv-projects.mount

You could also try using a key that is not protected by a passphrase (just for testing).

HTH,

Evo2.

michaelk · 07-05-2022, 05:49 PM

The OP wants to mount a remote directory on login and unmount it on logout. You don't need to create a systemd mount or add an entry to the /etc/fstab file.

The OP created a duplicate thread which also includes additional requirements.

Quote:

Ended up creating a desktop file under ~/.config/autostart. but it's an ugly hack with undesirable consequences (doesn't unmount on logout, for example).
Can you help me get systemd to mount my sshfs mount?
- As a regular user (not root)
- No fstab manipulation

There is no need to use systemd or fstab. As already posted you only need to add the command to the login and logout scripts which are in the user's home directory.

I use /etc/fstab because I prefer to have the remote directory automatically mounted when accessed and automatically unmounted after an idle timeout.

evo2 · 07-05-2022, 06:06 PM

Quote:

Originally Posted by michaelk

There is no need to use systemd or fstab. As already posted you only need to add the command to the login and logout scripts which are in the user's home directory.

There are many things that can be done with systemd users units, that can also be done other ways. OP is specifically asking about using systemd for this.

While it is true that it can be done another way it doesn't actually answer the question.

I used to do bunch of stuff with login and logout scripts. I've found that systemd user units are a great replacement for most of them. As such I'm slowly migrating them over to systemd units, so I understand why OP wants to solve this.

Ninguém · 07-06-2022, 01:55 AM

Thank you both evo2 and michaelk. That's right - I do would like to use systemd for this. Systemd user units should do, but seemingly they don't.
I should have stated that I'm using gnome-shell, so .bashrc and .bash_logout wouldn't work. I'm having a similar war over setting up umask 0022 to the entire gnome-session!
Ideally it all should just work with a mount and an automount unit.
I'm gravitating more to the conclusion that the systemd instance instantiated by user login has additional restrictions regarding mount units that the system wide one doesn't (security reasons?).
I already tried setting up a passwordless key and it still didn't work. But then... why would it work afterwords?!...
Read today that Lennart Poettering is leaving redhat. I wonder what will happen to systemd, now.
I wish I understood more about dbus. It seems to me dbus is some kind of wizardry that can, maybe, "talk" to the system wide instance of systemd and ask it to mount? Could it set my umask as well?...
:-/

michaelk · 07-06-2022, 06:47 AM

In my particular case I do not have a passphrase so gnome-keyring is not a player. If I do not include the key as IdentityFile=... as an option in the unit file the remote directory will not mount upon login but does once logged in and run as posted.