added change namespace and rolling restart functions for kubectl

plugins/kubectl/kubectl.plugin.zsh

@@ -59,6 +59,7 @@ alias kgns='kubectl get namespaces'
 alias kens='kubectl edit namespace'
 alias kdns='kubectl describe namespace'
 alias kdelns='kubectl delete namespace'
+alias kcn='kubectl config set-context $(kubectl config current-context) --namespace' #change namespace
 
 # ConfigMap management
 alias kgcm='kubectl get configmaps'
@@ -80,6 +81,10 @@ alias kdd='kubectl describe deployment'
 alias kdeld='kubectl delete deployment'
 alias ksd='kubectl scale deployment'
 alias krsd='kubectl rollout status deployment'
+# Recreate all pods in deployment with zero-downtime
+kres(){
+    kubectl set env $@ REFRESHED_AT=$(date +%Y%m%d%H%M%S)
+}
 
 # Rollout management.
 alias kgrs='kubectl get rs'