get_containers.sh

#!/bin/bash
set -u
​
while getopts n: opt; do
  optarg="${OPTARG}"
  if [[ "${opt}" = - ]]; then
    opt="-${OPTARG%%=*}"
    optarg="${OPTARG/${OPTARG%%=*}/}"
    optarg="${optarg#=}"
    set +u
    if [[ -z "${optarg}" ]] && [[ ! "${!OPTIND}" = "-*" ]]; then
        optarg="${!OPTIND}"
        shift
    fi
    set -u
  fi
  case "-${opt}" in
    -n|--namespace)
      namespace="${optarg}"
      ;;
    --*)
      echo "${0}: illegal option -- ${opt##-}" >&2
      exit 1
      ;;
  esac
done
shift $((OPTIND - 1))
​
​
pods=`kubectl get pods -n ${namespace:-default} | awk '{print $1}' | grep -v 'NAME'`
for pod in ${pods}; do
  echo '---'
  echo ${pod}
  kubectl describe pods ${pod} -n ${namespace:-default} | sed -n '/^Containers:/,$p' | grep -B 1 'Container ID:' | grep -v 'Container ID:' | grep -v "\-\-" | sed -e 's/://'
done
​
exit 0