docker_outdated.sh

docker_outdated.sh

#!/usr/bin/env bash

# Display which currently running docker images are outdated

set -eu -o pipefail

docker ps --format '{{ .Image }}' |
  while read -r image; do
    cur_digest=$(docker image inspect --format '{{ index .RepoDigests 0 }}' "$image" |
      cut -d'@' -f2-)
    latest_digest=$(regctl image digest "$image")
    if [[ $cur_digest != $latest_digest ]]; then
      printf '%s: current=%s; latest=%s\n' "$image" "$cur_digest" "$latest_digest"
    else
      printf '%s: ok\n' "$image"
    fi
  done