---
# Fail fast on known-bad flags that prevent k3s from starting.

- name: Validate kube-apiserver args (known unsupported flags)
  ansible.builtin.assert:
    that:
      - _bad_kube_apiserver_args | length == 0
    fail_msg: >-
      k3s_kube_apiserver_args contains unsupported flag(s): {{ _bad_kube_apiserver_args | join(', ') }}.
      This can prevent k3s from starting (e.g. kube-apiserver exits with "unknown flag").
  vars:
    _bad_kube_apiserver_args: >-
      {{
        (k3s_kube_apiserver_args | default([]))
        | select('search', '^etcd-timeout=')
        | list
      }}

- name: Validate datastore configuration (embedded etcd vs external datastore)
  ansible.builtin.assert:
    that:
      - not ((k3s_cluster_init | default(false) | bool) and ((k3s_datastore_endpoint | default('')) | length > 0))
    fail_msg: >-
      Invalid k3s datastore config: k3s_cluster_init=true cannot be used with an external datastore.
      Set k3s_cluster_init: false (or unset k3s_datastore_endpoint).
  when: k3s_role == 'server'