---
- name: Install k3s on master node
  hosts: master
  become: yes
  vars:
    k3s_version: "v1.35.0+k3s1"
    k3s_download_url: "http://download.9981.tech/k3s-v1.35.0%2Bk3s1"
    master_ip: "47.113.186.215"
    k3s_token: "my-secret-token"

  tasks:
    - name: Check if k3s service exists
      stat:
        path: /etc/systemd/system/k3s.service
      register: k3s_service_exists

    - name: Stop k3s service if it exists
      systemd:
        name: k3s
        state: stopped
      when: k3s_service_exists.stat.exists
      ignore_errors: yes

    - name: Check for running k3s processes
      shell: pgrep -f k3s
      register: k3s_processes
      failed_when: false
      changed_when: false

    - name: Kill running k3s processes if any exist
      shell: pkill -f k3s
      when: k3s_processes.rc == 0  # Only run if processes were found

    - name: Remove k3s service file
      file:
        path: /etc/systemd/system/k3s.service
        state: absent

    - name: Remove k3s data directories
      file:
        path: "{{ item }}"
        state: absent
      loop:
        - /var/lib/rancher/k3s
        - /etc/rancher/k3s
        - /root/.kube

    - name: Print cleanup status
      debug:
        msg: "Cleanup completed on master node"

    - name: Check if k3s binary exists
      stat:
        path: /usr/local/bin/k3s
      register: k3s_binary

    - name: Download k3s binary
      get_url:
        url: "{{ k3s_download_url }}"
        dest: /usr/local/bin/k3s
        mode: '0755'
      when: not k3s_binary.stat.exists

    - name: Print k3s binary status
      debug:
        msg: "k3s binary already exists, skipping download"
      when: k3s_binary.stat.exists

    - name: Create k3s systemd service file
      template:
        src: k3s.service.j2
        dest: /etc/systemd/system/k3s.service
        mode: '0644'

    - name: Reload systemd daemon
      systemd:
        daemon_reload: yes

    - name: Enable and start k3s service
      systemd:
        name: k3s
        enabled: yes
        state: started

    - name: Wait for node-token file to be created
      wait_for:
        path: /var/lib/rancher/k3s/server/node-token
        timeout: 120
      register: token_wait

    - name: Check k3s service status
      shell: systemctl is-active k3s
      register: service_status
      ignore_errors: yes

    - name: Display k3s service status
      debug:
        msg: "k3s service status on master: {{ service_status.stdout }}"
      
    - name: Get k3s logs if service is not active
      shell: journalctl -u k3s --no-pager -n 20
      when: service_status.stdout != 'active'
      register: service_logs
      ignore_errors: yes

    - name: Display k3s logs if needed
      debug:
        msg: "{{ service_logs.stdout_lines }}"
      when: service_status.stdout != 'active'

    - name: Display success message
      debug:
        msg: "k3s master node installed and running successfully"