Add kubectl bash completion

roles/kubernetes/master/tasks/config.yml

@@ -45,6 +45,9 @@
 - name: write the kubecfg (auth) file for kubectl
   template: src=kubectl.kubeconfig.j2 dest={{ kube_config_dir }}/kubectl.kubeconfig backup=yes
 
+- name: Copy kubectl bash completion
+  copy: src=kubectl_bash_completion.sh dest=/etc/bash_completion.d/kubectl.sh
+
 - name: Create proxy environment vars dir
   file: path=/etc/systemd/system/kube-proxy.service.d state=directory