Simple cron script to check to see if a docker container is runnign or not and restarts it if not.

docker-monitor.sh

#!/bin/bash
# Docker Monitor v1.3
# Simple cron script to check to see if a docker container is runnign or not and restarts it if not.
# Ron Egli <[email protected]>

# Grab the container name from cli argument
CONTAINER_NAME=$1

if [ -z "$CONTAINER_NAME" ]
then
        echo $(date -u) "No container specified"
        exit
fi

# Check to see if the service is running
servicerunning=$(/usr/bin/docker ps | grep "$CONTAINER_NAME")

if [ -z "$servicerunning" ]
then
        # Service is not running. Check to see if Exists
        serviceexist=$(/usr/bin/docker ps -a | grep "$CONTAINER_NAME")
        if [ -z "$serviceexist" ]
        then
                # Container in question doesn't exist
                echo $(date -u) "Container (" $CONTAINER_NAME ") does not exist"
        else
                # Container exists, lets start it
                echo $(date -u) "Container (" $CONTAINER_NAME ") not running"
                /usr/bin/docker start "$CONTAINER_NAME"
        fi
else
        # Container is already running, nothing to do here
        echo $(date -u) "Container (" $CONTAINER_NAME ") is running"
fi