groups:
  - name: cmpp-host-resources
    rules:
      - alert: NodeExporterDown
        expr: up{job="node"} == 0
        for: 2m
        labels:
          severity: critical
          service: node-exporter
        annotations:
          summary: 主机指标采集不可用
          description: Prometheus连续2分钟无法采集Node Exporter。
          currentValue: "{{ $value }}"
          threshold: "up = 1"

      - alert: HostCpuUsageWarning
        expr: (100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 85) and (100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) <= 95)
        for: 10m
        labels:
          severity: warning
          service: host
        annotations:
          summary: CPU使用率持续偏高
          description: 主机CPU使用率连续10分钟高于85%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "85%"

      - alert: HostCpuUsageCritical
        expr: 100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 95
        for: 5m
        labels:
          severity: critical
          service: host
        annotations:
          summary: CPU使用率严重超限
          description: 主机CPU使用率连续5分钟高于95%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "95%"

      - alert: HostMemoryUsageWarning
        expr: ((1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100 > 85) and ((1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100 <= 95)
        for: 10m
        labels:
          severity: warning
          service: host
        annotations:
          summary: 内存使用率持续偏高
          description: 主机可用内存连续10分钟低于15%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "85%"

      - alert: HostMemoryUsageCritical
        expr: (1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100 > 95
        for: 5m
        labels:
          severity: critical
          service: host
        annotations:
          summary: 内存使用率严重超限
          description: 主机可用内存连续5分钟低于5%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "95%"

      - alert: HostRootDiskUsageWarning
        expr: ((1 - node_filesystem_avail_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_size_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 > 80) and ((1 - node_filesystem_avail_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_size_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 <= 90)
        for: 15m
        labels:
          severity: warning
          service: host
        annotations:
          summary: 根文件系统空间不足
          description: 根文件系统使用率连续15分钟高于80%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "80%"

      - alert: HostRootDiskUsageCritical
        expr: (1 - node_filesystem_avail_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_size_bytes{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 > 90
        for: 5m
        labels:
          severity: critical
          service: host
        annotations:
          summary: 根文件系统空间严重不足
          description: 根文件系统使用率连续5分钟高于90%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "90%"

      - alert: HostRootInodeUsageWarning
        expr: ((1 - node_filesystem_files_free{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_files{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 > 80) and ((1 - node_filesystem_files_free{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_files{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 <= 90)
        for: 15m
        labels:
          severity: warning
          service: host
        annotations:
          summary: 根文件系统inode余量偏低
          description: 根文件系统inode使用率连续15分钟高于80%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "80%"

      - alert: HostRootInodeUsageCritical
        expr: (1 - node_filesystem_files_free{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"} / node_filesystem_files{mountpoint="/",fstype!~"tmpfs|overlay|squashfs"}) * 100 > 90
        for: 5m
        labels:
          severity: critical
          service: host
        annotations:
          summary: 根文件系统inode严重不足
          description: 根文件系统inode使用率连续5分钟高于90%。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "90%"

      - alert: HostCpuIowaitWarning
        expr: (avg by (instance) (rate(node_cpu_seconds_total{mode="iowait"}[5m])) * 100 > 20) and (avg by (instance) (rate(node_cpu_seconds_total{mode="iowait"}[5m])) * 100 <= 35)
        for: 10m
        labels:
          severity: warning
          service: host
        annotations:
          summary: CPU iowait持续偏高
          description: 主机CPU iowait连续10分钟高于20%，请检查磁盘I/O。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "20%"

      - alert: HostCpuIowaitCritical
        expr: avg by (instance) (rate(node_cpu_seconds_total{mode="iowait"}[5m])) * 100 > 35
        for: 10m
        labels:
          severity: critical
          service: host
        annotations:
          summary: CPU iowait严重超限
          description: 主机CPU iowait连续10分钟高于35%，磁盘I/O可能已成为瓶颈。
          currentValue: "{{ printf \"%.1f\" $value }}%"
          threshold: "35%"

  - name: cmpp-core-services
    rules:
      - alert: CmppCoreServiceInactive
        expr: node_systemd_unit_state{name=~"cmpp-api\\.service|cmpp-gateway\\.service|postgresql\\.service|redis(-server)?\\.service|cmpp-minio\\.service|nginx\\.service",state="active"} == 0
        for: 2m
        labels:
          severity: critical
          service: "{{ $labels.name }}"
        annotations:
          summary: CMPP核心服务未处于active状态
          description: "systemd服务 {{ $labels.name }} 连续2分钟未处于active状态。"
          currentValue: "{{ $value }}"
          threshold: "active = 1"