HetznerTerra/ansible/roles/k3s-agent/tasks/main.yml

---
- name: Check if k3s agent is already installed
  stat:
    path: /usr/local/bin/k3s-agent
  register: k3s_agent_binary

- name: Download k3s install script
  get_url:
    url: https://get.k3s.io
    dest: /tmp/install-k3s.sh
    mode: "0755"
  when: not k3s_agent_binary.stat.exists

- name: Install k3s agent
  when: not k3s_agent_binary.stat.exists
  block:
    - name: Run k3s agent install
      environment:
        INSTALL_K3S_VERSION: "{{ k3s_version if k3s_version != 'latest' else '' }}"
        K3S_URL: "{{ k3s_server_url }}"
        K3S_TOKEN: "{{ k3s_token }}"
      command: >-
        /tmp/install-k3s.sh agent
        --node-ip {{ k3s_node_ip }}
        {% if k3s_kubelet_cloud_provider_external | bool %}--kubelet-arg=cloud-provider=external{% endif %}
      args:
        creates: /usr/local/bin/k3s-agent
  rescue:
    - name: Show k3s-agent service status after failed install
      command: systemctl status k3s-agent --no-pager
      register: k3s_agent_status_after_install
      changed_when: false
      failed_when: false

    - name: Show recent k3s-agent logs after failed install
      command: journalctl -u k3s-agent -n 120 --no-pager
      register: k3s_agent_journal_after_install
      changed_when: false
      failed_when: false

    - name: Fail with k3s-agent diagnostics
      fail:
        msg: |
          k3s agent install failed on {{ inventory_hostname }}.
          Service status:
          {{ k3s_agent_status_after_install.stdout | default('n/a') }}

          Recent logs:
          {{ k3s_agent_journal_after_install.stdout | default('n/a') }}

- name: Wait for k3s agent to be ready
  command: systemctl is-active k3s-agent
  register: agent_status
  until: agent_status.stdout == "active"
  retries: 30
  delay: 10
  changed_when: false