---
- name: 检测主机 CPU、内存、磁盘占用
  hosts: all
  gather_facts: yes
  vars:
    warn_threshold: 80
    crit_threshold: 90

  tasks:
    - name: 获取 CPU 使用率
      shell: |
        top -bn1 | grep "Cpu(s)" | awk '{print "cpu_usage:" $2}' | cut -d'%' -f1
      register: cpu_result

    - name: 获取内存使用率
      shell: |
        free | grep Mem | awk '{printf "memory_used:%.0f\nmemory_total:%.0f\n", $3, $2}'
      register: mem_result

    - name: 获取磁盘使用率
      shell: |
        df -h | grep -E '/$|/data' | awk '{print $1 ":" $5}'
      register: disk_result

    - name: 格式化输出
      set_fact:
        cpu_usage: "{{ cpu_result.stdout_lines[0].split(':')[1] | trim }}"
        memory_used_mb: "{{ (mem_result.stdout_lines[0].split(':')[1] | trim | float / 1024) | round | int }}"
        memory_total_mb: "{{ (mem_result.stdout_lines[1].split(':')[1] | trim | float / 1024) | round | int }}"
        disk_usage: "{{ disk_result.stdout_lines }}"

    - name: 显示检测结果
      debug:
        msg: |
          ================== 主机检测报告 ==================
          主机名: {{ inventory_hostname }}
          CPU 使用率: {{ cpu_usage }}%
          内存使用: {{ memory_used_mb }} MB / {{ memory_total_mb }} MB
          磁盘使用:
          {% for disk in disk_usage %}
            - {{ disk }}
          {% endfor %}
          =================================================

    - name: 告警判断
      fail:
        msg: "{{ inventory_hostname }} CPU 使用率超过 {{ crit_threshold }}%: {{ cpu_usage }}%"
      when: cpu_usage | int >= crit_threshold

    - name: 警告判断
      debug:
        msg: "⚠️ WARNING: {{ inventory_hostname }} CPU 使用率超过 {{ warn_threshold }}%: {{ cpu_usage }}%"
      when: cpu_usage | int >= warn_threshold and cpu_usage | int < crit_threshold