runbooks-ansible/ansible/k3s.yaml

- name: Validate cluster selection and derive group names
  hosts: localhost
  gather_facts: false
  vars:
    cluster: "{{ cluster | default('') }}"
    cluster_prefix: "{{ cluster | regex_replace('-cluster$', '') }}"
    master_group: "{{ cluster_prefix }}-master"
    node_group: "{{ cluster_prefix }}-node"
  tasks:
    - name: cluster must be provided
      ansible.builtin.assert:
        that:
          - cluster | length > 0
        fail_msg: "Missing required var 'cluster'. Example: -e cluster=dev-cluster"

    - name: cluster must be a *-cluster group
      ansible.builtin.assert:
        that:
          - cluster is match('.*-cluster$')
        fail_msg: "cluster must end with '-cluster' (ex: dev-cluster). Got: {{ cluster }}"

    - name: cluster group must exist in inventory
      ansible.builtin.assert:
        that:
          - cluster in groups
        fail_msg: "Cluster group '{{ cluster }}' not found in inventory."

    - name: derived master/node groups must exist in inventory
      ansible.builtin.assert:
        that:
          - master_group in groups
          - node_group in groups
        fail_msg: >-
          Expected derived groups '{{ master_group }}' and '{{ node_group }}' to exist in inventory
          for cluster '{{ cluster }}'.

- name: Install prerequisites on all nodes
  hosts: "{{ cluster }}"
  gather_facts: yes
  become: yes
  vars_files:
    - "roles/k3s/vars/main.yaml"
  roles:
    - base
    - k3s/prereq
    - k3s/download

- name: Install k3s on master nodes
  hosts: "{{ (cluster | regex_replace('-cluster$', '')) ~ '-master' }}"
  gather_facts: yes
  become: yes
  vars_files:
    - "roles/k3s/vars/main.yaml"
  roles:
    - k3s/master

- name: Install k3s on worker nodes
  hosts: "{{ (cluster | regex_replace('-cluster$', '')) ~ '-node' }}"
  gather_facts: yes
  become: yes
  vars_files:
    - "roles/k3s/vars/main.yaml"
  roles:
    - k3s/node

- name: Post Install for k3s
  hosts: "{{ (cluster | regex_replace('-cluster$', '')) ~ '-master' }}"
  gather_facts: yes
  become: yes
  vars_files:
    - "roles/k3s/vars/main.yaml"
  roles:
    - k3s/post