I run some servers that use a ramdisk to increase performance for recording audio files. Since ramdisks evaporate on a reboot, and I have services that depend on the ramdisk to operate properly, I needed a way to:
- Automatically create the ramdisk on boot
- Ensure it’s set up prior to the services that depend on it
- Perform cleanup on the ramdisk when the server is shut down
The set of scripts below accomplish this nicely by leveraging systemd. Here’s a quick rundown of what each does:
- ramdisk: The script is written as a System V init script, and would be
placed at
/etc/init/ramdisk. Does the work of:- Creating the ramdisk
- Calling an optionally configured script to perform cleanup prior to tearing down the ramdisk
- customize: This is an optional file to override the default settings of
the first script. Place it at
/etc/default/ramdiskwith any customizations you like. - ramdisk.service: systemd service file that calls the start/stop
functions of
ramdisk. Place this anywhere systemd recognizes service scripts, and runsystemctl daemon-reload.
The nice thing about this setup through systemd is that any other systemd services that depend on the ramdisk being set up can simply include this in their service description:
Requires=ramdisk.service
After=ramdisk.service