show kubectl container resources on node

#!/usr/bin/env bash

set -o errexit

#: ${1?"Usage: $0 <NODE>"}

[[ "$1" = "--help" ]] && echo "Usage: $0 <NODE>" && exit 0

NODE=$1

JQ_TEMPLATE="
  [
    .items[] as \$items
    | \$items.spec.containers[] as \$containers
    | \$items
"

[[ ! -z "$NODE" ]] && JQ_TEMPLATE+=" | select(.spec.nodeName==\"$NODE\")"

JQ_TEMPLATE+="
    | del(.spec.containers) as \$containers2
    | \$containers * \$containers2
    | {
      node: .spec.nodeName,
      ns: .metadata.namespace,
      name: .metadata.name,
      image: .image,
      cpu: ((.resources.requests.cpu // \"---\") + \"/\" + (.resources.limits.cpu // \"---\")),
      mem: ((.resources.requests.memory // \"---\") + \"/\" + (.resources.limits.memory // \"---\"))
    }
  ]
  |  [.[]| with_entries( .key |= ascii_upcase ) ]
  |    (.[0] |keys_unsorted | @tsv)               # print headers
     , (.[]|.|map(.) |@tsv)                       # print table
"

kubectl get po -A -o json | jq  -r "$JQ_TEMPLATE" | column -t | awk -v bld=$(tput bold) -v rst=$(tput sgr0) 'NR == 1{$0 = bld$0rst} 1'