A simple watchdog to monitor and keep alive a process. Your process should update a watch file such as /var/tmp/myprocess.watchdog at regular intervals. The watchdog checks this is being updated and if not assumes it is hung. The watchdog then attempts to kill any matching prcoesses and restart a new one.
Install the latest version with
composer require blacknell/watchdog
Run from within crontab at an interval less frequent than the watchdog file update rate.
*/5 * * * * sudo /usr/bin/php /home/pi/heating/watchdog.php > /dev/null 2>&1
PSR-3 logging is supported via monolog/monolog by passing
an optional Logger object to the API constructor.