ansible-role-k3s/tasks/validate/configuration/control-node-count.yml

---

- name: Check the conditions when a single controller is defined
  ansible.builtin.assert:
    that:
      - (k3s_controller_list | length == 1)
        and ("datastore-endpoint" not in k3s_runtime_config or not k3s_runtime_config['datastore-endpoint'])
        and (k3s_etcd_datastore is not defined or not k3s_etcd_datastore)
    success_msg: "Control plane configuration is valid."
    fail_msg: "Control plane configuration is invalid. Please see notes about k3s_control_node and HA in README.md."
  when: k3s_controller_list | length == 1
        and not k3s_use_unsupported_config
        and k3s_control_node

- name: Check the conditions when multiple controllers are defined
  ansible.builtin.assert:
    that:
      - (k3s_controller_list | length >= 2)
        and (("datastore-endpoint" in k3s_runtime_config and k3s_runtime_config['datastore-endpoint'])
            or (k3s_etcd_datastore is defined and k3s_etcd_datastore))
    success_msg: "Control plane configuration is valid."
    fail_msg: "Control plane configuration is invalid. Please see notes about k3s_control_node and HA in README.md."
  when: k3s_controller_list | length >= 2
        and k3s_control_node

- name: Check the conditions when embedded etcd is defined
  ansible.builtin.assert:
    that:
      - (k3s_controller_list | length >= 3)
        and (((k3s_controller_list | length) % 2) == 1)
    success_msg: "Control plane configuration is valid."
    fail_msg: "Etcd should have a minimum of 3 defined members and the number of members should be odd. Please see notes about HA in README.md"
  when: k3s_etcd_datastore is defined
        and k3s_etcd_datastore
        and not k3s_use_unsupported_config
        and k3s_control_node