Keep service backups under /etc/systemd/system (#324)

- name: Update node only if needed

  when: installed_k3s_version is version(k3s_version, '<')

  block:

    - name: Find K3s service files

      ansible.builtin.find:

        paths: "{{ systemd_dir }}"

        patterns: "k3s*.service"

      register: k3s_service_files

    - name: Save current K3s service

      ansible.builtin.shell:

        cmd: "cp {{ systemd_dir }}/k3s*.service /tmp/"

      changed_when: true

      ansible.builtin.copy:

        src: "{{ item.path }}"

        dest: "{{ item.path }}.bak"

        remote_src: true

        mode: preserve

        force: true

      loop: "{{ k3s_service_files.files }}"

    - name: Install new K3s Version

      ansible.builtin.command:

      changed_when: true

    - name: Restore K3s service

      ansible.builtin.shell:

        cmd: "mv /tmp/k3s*.service {{ systemd_dir }}/"

      changed_when: true

      ansible.builtin.copy:

        src: "{{ item.path }}.bak"

        dest: "{{ item.path }}"

        remote_src: true

        mode: preserve

        force: true

      loop: "{{ k3s_service_files.files }}"

    - name: Clean up temporary K3s service backups

      ansible.builtin.file:

        path: "{{ item.path }}.bak"

        state: absent

      loop: "{{ k3s_service_files.files }}"

    - name: Restart K3s service [server]

      when: "'server' in group_names"