apiVersion: operator.victoriametrics.com/v1beta1
kind: VMRule
metadata:
  name: host-health
  namespace: monitoring
  labels:
    app.kubernetes.io/part-of: victoria-metrics
spec:
  groups:
  - name: host-health
    interval: 30s
    rules:
    - alert: HostMemoryLow
      expr: (node_memory_MemAvailable_bytes{job="node-exporter"} / node_memory_MemTotal_bytes{job="node-exporter"})
        < 0.10
      for: 10m
      labels:
        severity: warning
      annotations:
        summary: 主机 {{ $labels.instance }} 可用内存不足 10%
        description: 检查主机内存、Swap、进程 PSS；仅使用 node-exporter job，避免重复采集统计。
        runbook_url: https://git.ddupan.top/panxiao81/homelab-wiki/src/branch/main/guides/monitoring-foundation.md
    - alert: HostFilesystemSpaceLow
      expr: (node_filesystem_avail_bytes{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        / node_filesystem_size_bytes{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        < 0.10) and on(instance,device,mountpoint) (node_filesystem_readonly{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        == 0)
      for: 15m
      labels:
        severity: warning
      annotations:
        summary: 主机 {{ $labels.instance }} {{ $labels.mountpoint }} 可用空间不足 10%
        description: 检查文件系统和 ZFS dataset 容量，清理前确认数据归属。
        runbook_url: https://git.ddupan.top/panxiao81/homelab-wiki/src/branch/main/guides/monitoring-foundation.md
    - alert: HostFilesystemInodesLow
      expr: (node_filesystem_files_free{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        / node_filesystem_files{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        < 0.10) and on(instance,device,mountpoint) (node_filesystem_files{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        > 0) and on(instance,device,mountpoint) (node_filesystem_readonly{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        == 0)
      for: 15m
      labels:
        severity: warning
      annotations:
        summary: 主机 {{ $labels.instance }} {{ $labels.mountpoint }} inode 不足 10%
        description: 检查小文件数量，确认 filesystem 是否耗尽 inode。
        runbook_url: https://git.ddupan.top/panxiao81/homelab-wiki/src/branch/main/guides/monitoring-foundation.md
    - alert: HostFilesystemReadOnly
      expr: node_filesystem_readonly{job="node-exporter",fstype!~"tmpfs|devtmpfs|overlay|squashfs|nsfs|fuse.*",mountpoint!~"/run(/.*)?|/var/lib/kubelet/.*|/var/lib/docker/.*"}
        == 1
      for: 5m
      labels:
        severity: critical
      annotations:
        summary: 主机 {{ $labels.instance }} {{ $labels.mountpoint }} 变为只读
        description: 排查磁盘和文件系统错误；不要直接强制重新挂载。
        runbook_url: https://git.ddupan.top/panxiao81/homelab-wiki/src/branch/main/guides/monitoring-foundation.md
    - alert: HostZpoolUnhealthy
      expr: node_zfs_zpool_state{job="node-exporter",state!="online"} == 1
      for: 5m
      labels:
        severity: critical
      annotations:
        summary: 主机 {{ $labels.instance }} ZFS 池 {{ $labels.zpool }} 状态 {{ $labels.state }}
        description: 检查 zpool status、磁盘和冗余；零值状态不触发。
        runbook_url: https://git.ddupan.top/panxiao81/homelab-wiki/src/branch/main/guides/monitoring-foundation.md