ansible-role-k3s/tasks/validate/check-master-count.yml

---

- name: Check the conditions when a single controller is defined
  assert:
    that:
      - (k3s_controller_count | length == 1)
        and (k3s_datastore_endpoint is not defined or not k3s_datastore_endpoint)
        and (k3s_dqlite_datastore is not defined or not k3s_dqlite_datastore)
        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_count | length == 1
        and not k3s_use_unsupported_config

- name: Check the conditions when multiple controllers are defined
  assert:
    that:
      - (k3s_controller_count | length >= 2)
        and ((k3s_datastore_endpoint is defined and k3s_datastore_endpoint)
              or (k3s_dqlite_datastore is defined and k3s_dqlite_datastore)
              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_count | length >= 2

- name: Check the conditions when embedded etcd is defined
  assert:
    that:
      - (k3s_controller_count | length >= 3)
        and (((k3s_controller_count | 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 and not k3s_use_unsupported_config