refactor to use roles

roles/master/tasks/main.yml

@@ -0,0 +1,33 @@
+- name: Initialize the Kubernetes cluster using kubeadm
+  command: kubeadm init --apiserver-advertise-address="{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
+
+- name: Creates .kube directory
+  file:
+    path: /home/{{ ansible_user_id }}/.kube
+    state: directory
+
+- name: Copy files needed for kubectl
+  copy:
+    remote_src: yes
+    src: /etc/kubernetes/admin.conf
+    dest: /home/{{ ansible_user_id }}/.kube/config
+    owner: "{{ ansible_user_id }}"
+    group: users
+
+- name: Set up weave network
+  shell: export KUBECONFIG=/etc/kubernetes/admin.conf && export kubever=$(kubectl version | base64 | tr -d '\n') && kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever"
+  register: weavenet_out
+
+- name: Generate join command
+  command: kubeadm token create --print-join-command
+  register: kubernetes_join_command_result
+  
+- name: Set the kubeadm join command globally.
+  set_fact:
+    kubernetes_join_command: >
+      {{ kubernetes_join_command_result.stdout }}
+      {{ kubernetes_join_command_extra_opts }}
+  when: kubernetes_join_command_result.stdout is defined
+  delegate_to: "{{ item }}"
+  delegate_facts: true
+  with_items: "{{ groups['all'] }}"