geerlingguy.ansible-role-kubernetes/tasks/main.yml

---
- name: Include OS-specific variables.
  include_vars: "{{ ansible_os_family }}.yml"

- include_tasks: setup-RedHat.yml
  when: ansible_os_family == 'RedHat'

- include_tasks: setup-Debian.yml
  when: ansible_os_family == 'Debian'

- name: Ensure dependencies are installed.
  package: name=curl state=present

- name: Install Kubernetes packages.
  package:
    name: "{{ item.name | default(item) }}"
    state: "{{ item.state | default('present') }}"
  notify: restart kubelet
  with_items: "{{ kubernetes_packages }}"

# per the install doc, 
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
- name: Set sysctl for IPv4 bridges
  sysctl:
    name: net.bridge.bridge-nf-call-iptables
    value: '1'
    state: present

- name: Set sysctl for IPv6 bridges
  sysctl:
    name: net.bridge.bridge-nf-call-ip6tables
    value: '1'
    state: present

- include_tasks: kubelet-setup.yml

- name: Ensure kubelet is started and enabled at boot.
  service:
    name: kubelet
    state: started
    enabled: true

- name: Check if Kubernetes has already been initialized.
  stat:
    path: /etc/kubernetes/admin.conf
  register: kubernetes_init_stat

# Set up master.
- include_tasks: master-setup.yml
  when: kubernetes_role == 'master'

# Set up nodes.
- name: Get the kubeadm join command from the Kubernetes master.
  command: kubeadm token create --print-join-command
  changed_when: false
  when: kubernetes_role == 'master'
  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'] }}"

- include_tasks: node-setup.yml
  when: kubernetes_role == 'node'