Compare Kubernetes Objects versions from two clusters

compare-k8s-objects-kind.sh

#!/usr/bin/env bash

set -e

declare -r  Cluster001="mlozano-eks-1-14"
declare -r  Cluster002="mlozano-eks-1-17"

declare -rl K8s_Kind_list="$(<K8s_Kind_list.txt)"

kubectx "${Cluster001}" > /dev/null
for i in ${K8s_Kind_list}; do
  declare -l Cluster001_Kind_${i}="$(kubectl explain "${i}" 2> /dev/null | awk '/VERSION/{ rc = 1; print $2 }; END { exit !rc }' || echo "unknown-kind")"
done

kubectx "${Cluster002}" > /dev/null
for i in ${K8s_Kind_list}; do
  declare -l Cluster002_Kind_${i}="$(kubectl explain "${i}" 2> /dev/null | awk '/VERSION/{ rc = 1; print $2 }; END { exit !rc }' || echo "unknown-kind")"
done

for kind in ${!Cluster001_Kind_*} ${!Cluster002_Kind_*}; do
  declare server="${kind//"_Kind_"*}"
  All_Kinds+="${!server} ${kind//*"_Kind_"/} ${!kind}\n"
done

echo -e "${All_Kinds}" | sed '/^$/d' | pr -2 -t -s | column -t

K8s_Kind_list.txt

Deployment
Ingress
CronJob
Service
ServiceMonitor
ConfigMap
Secret

Output example

mlozano-eks-1-17  configmap       v1                  mlozano-eks-1-14  configmap       v1
mlozano-eks-1-17  cronjob         batch/v1beta1       mlozano-eks-1-14  cronjob         batch/v1beta1
mlozano-eks-1-17  deployment      apps/v1             mlozano-eks-1-14  deployment      extensions/v1beta1
mlozano-eks-1-17  ingress         extensions/v1beta1  mlozano-eks-1-14  ingress         extensions/v1beta1
mlozano-eks-1-17  secret          v1                  mlozano-eks-1-14  secret          v1
mlozano-eks-1-17  service         v1                  mlozano-eks-1-14  service         v1
mlozano-eks-1-17  test-kind       unknown-kind        mlozano-eks-1-14  test-kind       unknown-kind