Mount/umount remote share before/after running a systemd service

orsomannaro

6/21/24, 3:57 PM

I'd like to use systemd to run a script that does a backup by saving the data to remote storage, so:

mount remote storage (e.g. NFS share)
run the script
umount remote storage

This is what I tried to do:

cat /etc/systemd/system/mnt-server-share.mount

[Unit]
Description=Remote storage test
After=network.target

[Mount]
What=server:/share
Where=/mnt/server/share
Type=nfs
Options=defaults,noauto
TimeoutSec=30

[Install]
WantedBy=multi-user.target

cat /etc/systemd/system/backuptest.service

[Unit]
Description=Remote backup test
RequiresMountsFor=/mnt/server/share

[Service]
Type=simple
ExecStart=/usr/local/bin/backup.sh
ExecStop= systemctl stop mnt-server-share.mount

[Install]
WantedBy=multi-user.target

But after script end/fail the remote stogare is not umount. I could put mount/umount in the script, but I wish I could do it with systemd ... Can anyone help me do this?

1 + 0

systemd

Score:0

Server

buchanan

6/21/24, 6:03 PM

In your automount file /etc/systemd/system/mnt-server-share.mount specify an idle timeout value.

TimeoutIdleSec=

      Configures an idle timeout. Once the mount has been idle for the specified time, systemd will attempt to unmount. Takes a unit-less value in seconds, or a time span value such as "5min 20s". Pass 0 to disable the timeout logic. The timeout is disabled by default.

From your example:

[Unit]
Description=Remote storage test
After=network.target

[Mount]
What=server:/share
Where=/mnt/server/share
Type=nfs
Options=defaults,noauto
TimeoutSec=30
TimeoutIdleSec=1m

[Install]
WantedBy=multi-user.target

+ 1

orsomannaro

6/23/24, 6:50 AM

Yes, it works, thanks! I thought I could eliminate `ExecStop` instead, doing some tests, it seems to be necessary: why?

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Mount/umount remote share before/after running a systemd service

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