Delete Docker Images that are older than N days

remove_old_images.sh

# Example: `remove_old_images 30` // Deletes all Docker Images 30 days or older

function remove_old_images() {
  if [ $# -eq 0 ]
    then
      echo "Pass in the number of days"
      exit 0
  fi
  docker images --format '{{.ID}} {{.CreatedAt}}' | \
  awk '{print $1 " " $2 }'  | \
  python -c  "import fileinput,datetime; print('\n'.join([i.rstrip().split(' ')[0] for i in fileinput.input() if (datetime.datetime.strptime(i.rstrip().split(' ')[1], '%Y-%M-%d') - datetime.datetime.now()).seconds/3600 > int($1)]))" \
  xargs docker rmi
}

⚠️ DO NOT RUN THIS UNLESS YOU KNOW WHAT YOU ARE DOING ⚠️

Use docker image prune instead:

https://docs.docker.com/engine/reference/commandline/image_prune/#description