clean-up-part-1.sh

for c in $(kubectx | grep -v gov | grep -v dev); do
    echo $c;
    kubectx $c
    
    kubectl -n istio-system patch iop istio-control-plane --type=json --patch='[ { "op": "remove", "path": "/metadata/finalizers" } ]'

    istioctl tag set default --revision 1-20-5 --overwrite

    kubectl -n flux-system --wait=false delete kustomization/istio-operator-bootstrap

    kubectl -n istio-system --wait=false delete hr istio-operator

    kubectl annotate MutatingWebhookConfiguration istio-revision-tag-default --overwrite meta.helm.sh/release-name=istiod-blue meta.helm.sh/release-namespace=istio-system
    kubectl label MutatingWebhookConfiguration istio-revision-tag-default --overwrite app.kubernetes.io/managed-by=Helm

    kubectl -n istio-system annotate --overwrite serviceaccount/istio-reader-service-account meta.helm.sh/release-name=istio-base meta.helm.sh/release-namespace=istio-system

    kubectl -n istio-system label --overwrite serviceaccount/istio-reader-service-account app.kubernetes.io/managed-by=Helm

    kubectl annotate --overwrite ValidatingWebhookConfiguration/istiod-default-validator meta.helm.sh/release-name=istio-base meta.helm.sh/release-namespace=istio-system

    kubectl label --overwrite ValidatingWebhookConfiguration/istiod-default-validator app.kubernetes.io/managed-by=Helm

    kubectl delete deployments istio-ingressgateway -n istio-system
    kubectl delete hpa istio-ingressgateway -n istio-system
    kubectl delete pdb istio-ingressgateway -n istio-system
    kubectl delete svc istio-ingressgateway -n istio-system --wait=false

    kubectl -n istio-system patch iop istio-control-plane --type=json --patch='[ { "op": "remove", "path": "/metadata/finalizers" } ]'
    kubectl delete iop istio-control-plane -n istio-system --wait=false

    istioctl tag set default --revision 1-20-5 --overwrite
done

# https://gist.github.com/qudongfang/caf14a5fddef540edc33b79fbc8db40b