Update nexus: fix conflicts and sync local changes
This commit is contained in:
Shen Wei
@@ -1,70 +1,70 @@
|
||||
---
|
||||
title: "node_exporter"
|
||||
type: entity
|
||||
aliases: [Node Exporter, Prometheus node_exporter]
|
||||
tags: [monitoring, exporter, host-metrics, prometheus, linux]
|
||||
date: 2025-11-11
|
||||
---
|
||||
|
||||
# node_exporter
|
||||
|
||||
## Overview
|
||||
node_exporter 是 Prometheus 官方的主机指标采集器，专门采集 Linux/Unix 系统的硬件和操作系统指标。它以守护进程形式运行，暴露一个 `/metrics` HTTP 端点供 Prometheus 抓取。默认端口 9100。设计上遵循无代理（agentless）原则：不需要在被监控主机安装任何特殊软件，只需运行一个独立的进程即可。
|
||||
|
||||
## Key Metrics Collected
|
||||
| 分类 | 指标前缀 | 说明 |
|
||||
|------|----------|------|
|
||||
| CPU | `node_cpu_seconds_total` | 各模式（user/system/idle/iowait）CPU 时间 |
|
||||
| 内存 | `node_memory_MemAvailable_bytes` | 可用内存 |
|
||||
| 磁盘 | `node_filesystem_avail_bytes` | 文件系统可用空间 |
|
||||
| 网络 | `node_network_receive_bytes_total` | 网络接口接收字节 |
|
||||
| 磁盘 I/O | `node_disk_io_time_seconds_total` | 磁盘 I/O 时间 |
|
||||
| 负载 | `node_load1` / `node_load5` / `node_load15` | 系统负载均值 |
|
||||
| inode | `node_filesystem_files_free` | inode 可用数量 |
|
||||
| 时间 | `node_time_seconds` | 系统时间（用于漂移检测） |
|
||||
|
||||
## Home Server Deployment（Host Network 模式）
|
||||
```yaml
|
||||
# docker-compose.yml 片段
|
||||
node_exporter:
|
||||
image: prom/node-exporter:latest
|
||||
container_name: node_exporter
|
||||
restart: always
|
||||
network_mode: "host" # 关键：使用宿主机网络
|
||||
pid: "host" # 关键：共享宿主机 PID 命名空间
|
||||
volumes:
|
||||
- /proc:/host/proc:ro # 只读挂载
|
||||
- /sys:/host/sys:ro
|
||||
- /:/rootfs:ro
|
||||
```
|
||||
|
||||
> ⚠️ **安全注意**：host network + pid mode 授予容器较高的系统可见性。仅在内网可信环境中使用。
|
||||
|
||||
## Prometheus scrape_config
|
||||
```yaml
|
||||
- job_name: 'node_exporter'
|
||||
file_sd_configs:
|
||||
- files:
|
||||
- /etc/prometheus/targets/node.yml
|
||||
```
|
||||
|
||||
## targets/node.yml 示例
|
||||
```yaml
|
||||
- targets:
|
||||
- "192.168.3.47:9100"
|
||||
labels:
|
||||
env: home
|
||||
role: server
|
||||
```
|
||||
|
||||
## Related Sources
|
||||
- [[家庭监控方案-prometheus-grafana-node-exporter-cadvisor-blackbox]]
|
||||
|
||||
## Related Entities
|
||||
- [[Prometheus]] — 数据消费者（抓取 node_exporter 的指标）
|
||||
- [[Docker]] — 部署平台
|
||||
|
||||
## Related Concepts
|
||||
- [[Exporter]] — Prometheus 生态中的通用指标暴露组件
|
||||
- [[Prometheus]] — 上游采集目标
|
||||
- [[System Monitoring]] — 核心应用领域
|
||||
---
|
||||
title: "node_exporter"
|
||||
type: entity
|
||||
aliases: [Node Exporter, Prometheus node_exporter]
|
||||
tags: [monitoring, exporter, host-metrics, prometheus, linux]
|
||||
date: 2025-11-11
|
||||
---
|
||||
|
||||
# node_exporter
|
||||
|
||||
## Overview
|
||||
node_exporter 是 Prometheus 官方的主机指标采集器，专门采集 Linux/Unix 系统的硬件和操作系统指标。它以守护进程形式运行，暴露一个 `/metrics` HTTP 端点供 Prometheus 抓取。默认端口 9100。设计上遵循无代理（agentless）原则：不需要在被监控主机安装任何特殊软件，只需运行一个独立的进程即可。
|
||||
|
||||
## Key Metrics Collected
|
||||
| 分类 | 指标前缀 | 说明 |
|
||||
|------|----------|------|
|
||||
| CPU | `node_cpu_seconds_total` | 各模式（user/system/idle/iowait）CPU 时间 |
|
||||
| 内存 | `node_memory_MemAvailable_bytes` | 可用内存 |
|
||||
| 磁盘 | `node_filesystem_avail_bytes` | 文件系统可用空间 |
|
||||
| 网络 | `node_network_receive_bytes_total` | 网络接口接收字节 |
|
||||
| 磁盘 I/O | `node_disk_io_time_seconds_total` | 磁盘 I/O 时间 |
|
||||
| 负载 | `node_load1` / `node_load5` / `node_load15` | 系统负载均值 |
|
||||
| inode | `node_filesystem_files_free` | inode 可用数量 |
|
||||
| 时间 | `node_time_seconds` | 系统时间（用于漂移检测） |
|
||||
|
||||
## Home Server Deployment（Host Network 模式）
|
||||
```yaml
|
||||
# docker-compose.yml 片段
|
||||
node_exporter:
|
||||
image: prom/node-exporter:latest
|
||||
container_name: node_exporter
|
||||
restart: always
|
||||
network_mode: "host" # 关键：使用宿主机网络
|
||||
pid: "host" # 关键：共享宿主机 PID 命名空间
|
||||
volumes:
|
||||
- /proc:/host/proc:ro # 只读挂载
|
||||
- /sys:/host/sys:ro
|
||||
- /:/rootfs:ro
|
||||
```
|
||||
|
||||
> ⚠️ **安全注意**：host network + pid mode 授予容器较高的系统可见性。仅在内网可信环境中使用。
|
||||
|
||||
## Prometheus scrape_config
|
||||
```yaml
|
||||
- job_name: 'node_exporter'
|
||||
file_sd_configs:
|
||||
- files:
|
||||
- /etc/prometheus/targets/node.yml
|
||||
```
|
||||
|
||||
## targets/node.yml 示例
|
||||
```yaml
|
||||
- targets:
|
||||
- "192.168.3.47:9100"
|
||||
labels:
|
||||
env: home
|
||||
role: server
|
||||
```
|
||||
|
||||
## Related Sources
|
||||
- [[家庭监控方案-prometheus-grafana-node-exporter-cadvisor-blackbox]]
|
||||
|
||||
## Related Entities
|
||||
- [[Prometheus]] — 数据消费者（抓取 node_exporter 的指标）
|
||||
- [[Docker]] — 部署平台
|
||||
|
||||
## Related Concepts
|
||||
- [[Exporter]] — Prometheus 生态中的通用指标暴露组件
|
||||
- [[Prometheus]] — 上游采集目标
|
||||
- [[System Monitoring]] — 核心应用领域
|
||||
|
||||
Reference in New Issue
Block a user