ansible-role-k3s/tasks/configure-k3s-cluster.yml

---

- name: Ensure ansible_host is mapped to inventory_hostname
  lineinfile:
    path: /tmp/inventory.txt
    line: >-
      {{ item }}
      @@@
      {{ hostvars[item].ansible_host | default(hostvars[item].ansible_fqdn) }}
      @@@
      {{ hostvars[item].k3s_control_node }}
    create: true
  loop: "{{ play_hosts }}"

- name: Lookup control node from file
  command: "grep 'True' /tmp/inventory.txt"
  changed_when: false
  register: k3s_control_delegate_raw

- name: Ensure control node is delegated to for obtaining a token
  set_fact:
    k3s_control_delegate: "{{ k3s_control_delegate_raw.stdout.split(' @@@ ')[0] }}"

- name: Ensure the control node address is registered in Ansible
  set_fact:
    k3s_control_node_address: "{{ hostvars[k3s_control_delegate].ansible_host | default(hostvars[k3s_control_delegate].ansible_fqdn) }}"
  when: k3s_control_node_address is not defined

- name: Ensure NODE_TOKEN is captured from control node
  slurp:
    path: "/var/lib/rancher/k3s/server/node-token"
  register: k3s_slurped_control_token
  delegate_to: "{{ k3s_control_delegate }}"
  when: k3s_control_token is not defined

- name: Ensure NODE_TOKEN is formatted correctly for use in templates
  set_fact:
    k3s_control_token: "{{ k3s_slurped_control_token.content | b64decode }}"
  when: k3s_control_token is not defined

- name: Ensure k3s service unit file is present
  template:
    src: k3s.service.j2
    dest: /etc/systemd/system/k3s.service
  notify:
    - reload systemd
    - restart k3s

- meta: flush_handlers

- name: Wait for control plane to be ready to accept connections
  wait_for:
    port: "{{ k3s_https_port }}"
    delay: 5
    sleep: 5
    timeout: 300
  when: k3s_control_node

- name: Wait for all nodes to be ready
  command: "{{ k3s_install_dir }}/kubectl get nodes"
  changed_when: false
  failed_when: false
  register: kubectl_get_nodes_result
  until: kubectl_get_nodes_result.rc == 0
         and kubectl_get_nodes_result.stdout.find("NotReady") == -1
  retries: 30
  delay: 20
  when: k3s_control_node