48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
---
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title: "Node Exporter"
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type: entity
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tags: [monitoring, exporter, prometheus, devops]
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last_updated: 2026-04-26
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---
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## Node Exporter — Prometheus 主机指标采集器
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**官方网址：** https://prometheus.io/docs/guides/node-exporter/
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**类型：** 开源项目 / Prometheus Exporter
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**别名：**
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- prometheus-node-exporter
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- node_exporter
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---
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## Overview
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Node Exporter 是 Prometheus 官方提供的 exporter，用于采集主机（服务器/NAS/树莓派等）的硬件和操作系统指标。以 DaemonSet 或独立进程方式运行，采集 CPU、内存、磁盘、网络、文件系统等数据。
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**采集指标示例：**
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- `node_cpu_seconds_total` — CPU 使用时间
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- `node_memory_MemAvailable_bytes` — 可用内存
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- `node_memory_MemTotal_bytes` — 总内存
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- `node_filesystem_avail_bytes` — 文件系统可用空间
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- `node_network_receive_bytes_total` — 网络接收字节
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- `node_load1` / `node_load5` / `node_load15` — 系统负载
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**典型部署：**
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- Docker: `prom/node-exporter:latest`，需 `network_mode: host` + volume 挂载 `/proc`、`/sys`、`/`
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- 端口：`9100`
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**关键告警规则示例：**
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- 磁盘剩余 < 10%: `node_filesystem_avail_bytes / node_filesystem_size_bytes < 0.10`
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- CPU 使用率 > 85%: `avg(rate(node_cpu_seconds_total{mode="user"}[2m])) * 100 > 85`
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- 内存可用 < 15%: `node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes < 0.15`
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---
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## Used By
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- [[家庭监控方案-prometheus-grafana-node-exporter-cadvisor-blackbox]]
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## Related Sources
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- [[家庭监控方案-prometheus-grafana-node-exporter-cadvisor-blackbox]]
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