Delete certain Kubernetes objects across all namespaces with parallel

_Delete certain Kubernetes objects across all namespaces with parallel.md

Samples to cleanup multiple configs across multiple namespaces in Kubernetes using kubectl and GNU parallel

cleanup_empty_replicasets.sh

#/bin/bash
kubectl get replicaset -A | awk '$3==0 && $4==0 && $5==0 {print $1,$2}' | parallel --jobs 4 --colsep ' ' kubectl delete replicaset -n {1} {2}

cleanup_evicted_pods.sh

#!/bin/bash
kubectl get pods -A | grep 'Evicted' | awk '{print $1,$2}' | parallel --jobs 4 --colsep ' ' kubectl delete pod -n {1} {2}

cleanup_istio_keycert.sh

#/bin/bash
kubectl get secrets -A | grep 'istio.io/key-and-cert' | awk '{print $1,$2}' | parallel  --jobs 4 --colsep ' ' kubectl delete secret -n {1} {2}

getdeployresourcerequests.sh

#!/bin/bash
if [ $# -lt 1 ]; then
  echo "Usage: getdeployresourcerequests <namespace>"
  exit 1
fi
kubectl get deploy -n $1 -o custom-columns=NAME:.metadata.name,CPU_Requests:.spec.template.spec.containers[].resources.requests.cpu,MEM_Requests:.spec.template.spec.containers[].resources.requests.memory