Watchdog | Pimatic

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Hello,
because i crashed my Pimatic the last days a little bit more often.
i wrote me a little watchdog script wich looks if pimatic is running and if not restarts it.

Maybe someone needs this too…

#!/bin/bash

PROZ="pimatic.js"

PID=$(pgrep -x $PROZ)
if [[ ! -z $PID ]] ; then
    echo "[$(date +"%Y-%m-%d %H:%M")]    $PROZ laeuft"
else
    echo "[$(date +"%Y-%m-%d %H:%M")]    $PROZ wurde neu gestartet" >> /var/log/$PROZ-watchdog.log
    sudo /home/pi/pimatic-app/node_modules/pimatic/$PROZ start
fi

exit 0

save as watchdog.sh
make executable

new crontab

sudo crontab -e

insert

* * * * *    bash /path/to/watchdog.sh >/dev/null 2>&1

(looks every minute)

thats it

Mit freundlichen Grüßen
Chris

@chris and what should people add to their crontab as well?

Sorry, some remarks

You name it name.sh and in your crontab you use watchdog.sh

And does this really work??

You use crontab -e suggesting that you are root or user pi?
And at the same time you use sudo /home/pi/pimatic-app/node_modules/pimatic/$PROZ start. . This is not necessary as root and correct implementations of sudo will even refuse to work mentioning that you are root and do not need sudo.
However, when you mean that you do the crontab -e as the normal user pi (or another normal user) this script will not work as the sudo requires a password.

I never log on as root so for me that would be sudo crontab -e to create the crontab job under root.
And then I would use /home/pi/pimatic-app/node_modules/pimatic/$PROZ start

There are more topics about watchdog scripts for both pimatic and a complete restart of the RPi.

Thanks for the comment.

edited the name of the file.

and hmm… sometimes a plugin wan’t start/load when i start pimatic without sudo… so i’ve choiced to start with sudo…

Danke

Funktioniert Klasse, bis ich mal zeit habe zum forschen warum mein pimatic immer unregelmäßig abstürzt .

I created a plugin which does something similar and also monitors the webserver if it still responds. I had some ocassions where pimatic process was still running but the webserver was not reachable anymore nor did pimatic react on any triggers.

https://forum.pimatic.org/topic/2286/new-plugin-pimatic-watchdog-unix/

It doesn’t use crontab as I wanted to have it deployable via plugin so it uses an shellscript which is started as a detached process as soon as pimatic is started up