shippable-builder-node-cleanup.sh

#!/bin/bash

set -e

if [ -f "/usr/bin/docker" ]; then
  exited=$(docker ps -a -q -f status=exited | wc -l)
  if [ $exited == "0" ]; then
    echo "No exited container to Remove"
  else
    echo "Removing exited docker containers..."
    docker rm -v $(docker ps -a -q -f status=exited)
  fi

  dangl=$(docker images --no-trunc -q -f "dangling=true" | wc -l)
  if [ $dangl == "0" ]; then
    echo "No orphan image to Remove"
  else
    echo "Removing dangling images..."
    docker rmi $(docker images --no-trunc -q -f "dangling=true")
  fi

  echo "Removing unused Volumes..."
  docker run -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker:/var/lib/docker --rm martin/docker-cleanup-volumes

  echo "Removing unused docker images"
  images=($(docker images --digests | egrep -v 'martin/docker-cleanup-volumes' | tail -n +2 | awk '{ img_id=$1; if($2!="<none>")img_id=img_id":"$2; if($3!="<none>") img_id=img_id"@"$3; print img_id}'))
  containers=($(docker ps -a | tail -n +2 | awk '{print $2}'))

  containers_reg=" ${containers[*]} "
  remove=()

  for item in ${images[@]}; do
    if [[ ! $containers_reg =~ " $item " ]]; then
      remove+=($item)
    fi
  done

  remove_images=" ${remove[*]} "

  running=$(docker ps | egrep -v 'shipimg/runsh|shipimg/mexec|CONTAINER ID'| wc -l)

  if [ $running == "0" ]; then
    if [ -z $remove_images ]; then
      echo "No Ununsed Image to Remove"
    else
      echo "Running idle, Removing Unused Images..."
      echo ${remove_images} | xargs -r docker rmi
    fi
  else
    echo "Currently running $running non-base containers"
  fi
else
  echo Not a Docker.
fi