groups:
  - name: homelab_alerts
    interval: 30s
    rules:
      # CPU Usage Alert
      - alert: HighCPUUsage
        expr: 100 - (avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 80
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "High CPU usage detected on {{ $labels.instance }}"
          description: "CPU usage is above 80% (current value: {{ $value }}%)"

      # Memory Usage Alert
      - alert: HighMemoryUsage
        expr: (1 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes)) * 100 > 85
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "High memory usage detected on {{ $labels.instance }}"
          description: "Memory usage is above 85% (current value: {{ $value }}%)"

      # Disk Usage Alert
      - alert: HighDiskUsage
        expr: (1 - (node_filesystem_avail_bytes{fstype!~"tmpfs|fuse.lxcfs"} / node_filesystem_size_bytes{fstype!~"tmpfs|fuse.lxcfs"})) * 100 > 80
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: "High disk usage detected on {{ $labels.instance }}"
          description: "Disk usage on {{ $labels.mountpoint }} is above 80% (current value: {{ $value }}%)"

      # Node Down Alert
      - alert: NodeDown
        expr: up{job="node-exporter"} == 0
        for: 2m
        labels:
          severity: critical
        annotations:
          summary: "Node {{ $labels.instance }} is down"
          description: "Node exporter on {{ $labels.instance }} has been down for more than 2 minutes"

      # Container Down Alert
      - alert: ContainerDown
        expr: up{job="docker"} == 0
        for: 2m
        labels:
          severity: critical
        annotations:
          summary: "Container {{ $labels.instance }} is down"
          description: "Docker container on {{ $labels.instance }} has been down for more than 2 minutes"

      # Disk I/O Alert (high wait time)
      - alert: HighDiskIOWait
        expr: rate(node_cpu_seconds_total{mode="iowait"}[5m]) * 100 > 20
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: "High disk I/O wait on {{ $labels.instance }}"
          description: "Disk I/O wait time is above 20% (current value: {{ $value }}%)"