check docker containers

gistfile1.txt

#!/bin/bash

# Nagios Usage: check_nrpe!check_docker_container!_container_id_
# Usage: ./check_docker_container.sh _container_id_
#
# The script checks if a docker host if all container are running.
#   OK - running
#   UNKNOWN - Container has non-zero exit code

CONTAINERS=`docker ps | awk '{if (NR!=1) {print}}' | perl -ne '@cols = split /\s{2,}/, $_; printf "%30s %20s %20s\n", $cols[5]'`

for CONTAINER in `echo ${CONTAINERS}`
do
        RUNNING=$(docker inspect --format="{{ .State.ExitCode }}" $CONTAINER 2> /dev/null)

        if [ $RUNNING -eq 1 ]; then
          echo "UNKNOWN - Check $CONTAINER state, non-zero Exit Code"
          exit 3
        fi

        STARTED=$(docker inspect --format="{{ .State.StartedAt }}" $CONTAINER)

        echo "OK - $CONTAINER is running. StartedAt: $STARTED"
done