[CE-363] Generate kubeconfig locally for ansible agent

Generate kubeconfig locally to allow running kubectl from
local and copy kubeconfig to worker nodes in kubernetes
cluster. This patch set fixed an error in previous patch
which fails in certain conditions.

Change-Id: Ic1e9be4b87fd765329f4c5a1b3f343839d6ddf2b
Signed-off-by: Tong Li <litong01@us.ibm.com>

src/agent/ansible/roles/env_k8s/master/tasks/apply.yml

@@ -116,10 +116,23 @@
     - kube-controller-manager
     - kube-scheduler
 
+- set_fact:
+    k8stokens: "{{ k8stokens | default([]) + [{'token': item.split(',')[0], 'name': item.split(',')[1]}] }}"
+  with_lines: cat "{{ playbook_dir }}/../../secrets/users/token.csv"
+  tags: "kubeconfig"
+
 - name: Generate kubeconfig
   template:
     src: "{{ playbook_dir }}/../env_k8s/master/templates/kubeconfig.j2"
-    dest: "~/.kube/config"
+    dest: "/etc/kubernetes/kubeconfig"
     mode: 0600
   become: false
-  delegate_to: cloud
+  tags: "kubeconfig"
+
+- name: Get the kubeconfig to the ansible controller
+  fetch:
+    src: "/etc/kubernetes/kubeconfig"
+    dest: "{{ playbook_dir }}/../../vars/kubeconfig"
+    flat: yes
+  become: false
+  tags: "kubeconfig"

src/agent/ansible/roles/env_k8s/master/templates/kubeconfig.j2

@@ -2,14 +2,24 @@ apiVersion: v1
 clusters:
 - cluster:
     insecure-skip-tls-verify: true
+{% if cluster.node_ip | default('private_ip') == 'private_ip' %}
     server: http://{{ private_ip }}:8080
+{% else %}
+    server: https://{{ public_ip }}:6443
+{% endif %}
   name: k8sonos
 contexts:
 - context:
     cluster: k8sonos
-    user: ""
+    user: "admin"
   name: k8s
 current-context: k8s
 kind: Config
 preferences: {}
-users: []
+users:
+{% for token in k8stokens %}
+  - name: {{ token.name }}
+    user:
+      token: {{ token.token }}
+{% endfor %}
+

src/agent/ansible/roles/env_k8s/worker/tasks/apply.yml

@@ -45,7 +45,7 @@
 
 - name: Copy kubeconfig for each node
   copy:
-    src: "~/.kube/config"
+    src: "{{ playbook_dir }}/../../vars/kubeconfig"
     dest: "{{ item }}"
     mode: 0600
   with_items: