Check status of Docker and attempt to restart the service it's stopped. If something goes wrong it will notify Telegram.

check_docker_status.sh

#!/bin/bash
# A simple bash script to check the current status of my Docker service
# If the 'rc.docker status' command returns anything other than "running" a message is sent to my Telegram bot
# The script will attempt to restart Docker and send the result to Telegram

TOKEN=""
CHAT_ID=""
URL="https://api.telegram.org/bot$TOKEN/sendMessage"

DOCKER_STATUS_FULL="$(/etc/rc.d/rc.docker status)"
DOCKER_STATUS=$(echo "$DOCKER_STATUS_FULL" | head -n1)
if [ "$DOCKER_STATUS" !=  "status of dockerd: running" ]
then
   MESSAGE="Looks like we might have a problem with Docker!

$DOCKER_STATUS_FULL

Attempting to restart Docker..."
   curl -s -X POST $URL -d chat_id=$CHAT_ID -d text="$MESSAGE"
   START_DOCKER="$(/etc/rc.d/rc.docker start)"
   curl -s -X POST $URL -d chat_id=$CHAT_ID -d text="$START_DOCKER"
   DOCKER_STATUS_FULL_RESTARTED="$(/etc/rc.d/rc.docker status)"
   curl -s -X POST $URL -d chat_id=$CHAT_ID -d text="$DOCKER_STATUS_FULL_RESTARTED"
fi