Copy secret between k8s namespaces

k8s_copy_secret.sh

#!/bin/bash
kubectl get <resource-type> <resource-name> -n <source-namespace-name> -o yaml |\
   sed 's/namespace: <source-namespace-name>/namespace: <target-namespace-name>/' |\
   kubectl create -f -

> Example:

kubectl get secret auth-token -n web-dev -o yaml |\
   sed 's/namespace: web-dev/namespace: web-qa/' |\
   kubectl create -f -

=== DEPRECATED ===

since `--export` flag has been deprecated, we will be using `sed` to achieve our goal

ref:
- https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.14.md#deprecations
- https://medium.com/@jonathan.johnson/export-has-been-deprecated-in-1-14-51cfef5a0cb7

kubectl get secret gitlab-registry --namespace=revsys-com --export -o yaml |\
   kubectl apply --namespace=devspectrum-dev -f -
   
# thanks to
# https://www.revsys.com/tidbits/copying-kubernetes-secrets-between-namespaces/