Check if service is running with CRON job

watch-service

#!/bin/bash
# Usage: sudo watch-service apcupsd
# Ensure service are running every minute
# * * * * * /root/bin/watch-service apcupsd > /dev/null

service=$@
/bin/systemctl -q is-active "$service.service"
status=$?
if [ "$status" == 0 ]; then
    echo "$service - OK"
else
    echo "$service - Starting..."
    /bin/systemctl start "$service.service"
fi

# Ref: https://maslosoft.com/kb/watching-for-service-with-cron/