Fixes #10: Set kubernetes_join_command more reliably.

tasks/main.yml

@@ -51,8 +51,15 @@
   shell: kubeadm token create --print-join-command
   changed_when: False
   when: kubernetes_role == 'master'
-  run_once: True
-  register: kubernetes_join_command
+  register: kubernetes_join_command_result
+
+- name: Set the kubeadm join command globally.
+  set_fact:
+    kubernetes_join_command: "{{ kubernetes_join_command_result.stdout }}"
+  when: kubernetes_join_command_result.stdout is defined
+  delegate_to: "{{ item }}"
+  delegate_facts: True
+  with_items: "{{ groups['all'] }}"
 
 - include_tasks: node-setup.yml
   when: kubernetes_role == 'node'

tasks/node-setup.yml

 ---
 - name: Join node to Kubernetes master
   shell: >
-    {{ kubernetes_join_command.stdout }}
+    {{ kubernetes_join_command }}
     creates=/etc/kubernetes/kubelet.conf