40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
---
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title: "node_exporter"
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type: concept
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tags: [exporter, prometheus, monitoring, linux]
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sources: [家庭监控方案-prometheus-grafana-node-exporter-cadvisor-blackbox]
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last_updated: 2026-04-16
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---
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## Definition
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node_exporter 是 Prometheus 官方的主机指标采集器，采集 Linux/Unix 主机的 CPU、内存、磁盘、网络、文件系统等系统指标。
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## Key Metrics
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- **CPU**：使用率、上下文切换、软中断
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- **内存**：总量、可用、已用、缓存
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- **磁盘**：使用率、IO、inode
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- **网络**：流量、丢包、错误
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- **文件系统**：挂载点、容量、使用率
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## Docker 部署
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```yaml
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node_exporter:
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image: prom/node-exporter:latest
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network_mode: "host"
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volumes:
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- /proc:/host/proc:ro
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- /sys:/host/sys:ro
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- /:/rootfs:ro
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```
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## Common Alert Rules
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- CPU 使用率 > 85%
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- 磁盘空间 < 10%
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- 可用内存 < 15%
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## Default Port
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- 9100
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## Connections
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- [[node_exporter]] ← scrapes_by ← [[Prometheus]]
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- [[node_exporter]] ← core_exporter ← [[监控可观测性]] |