Grafana + Prometheus + Node Exporter 实现对机器指标监控

一.背景

        最近在工作中需要改造现有的系统监控指标，为了更进进一步深入了解Grafana ，所以自己打算利用 Grafana （数据分析平台），Prometheus（数据源头），Node Exporter（采集机器指标）来完成对本机 内存，cup，网络的监控。

二.下载安装

  1.下载安装grafana

1.下载grafana
https://grafana.com/grafana/download/8.2.6?edition=oss&platform=linux

2.解压
tar -zxvf grafana-8.2.6.linux-amd64.tar.gz 

3.启动 grafana
 ./bin/grafana-server web

4.页面访问    默认（用户名:admin      密码:grafana）
http://localhost:3002

 2.下载安装Node Exporter

1.下载地址
https://prometheus.io/download/#node_exporter

2.解压
tar -zxvf node_exporter-1.4.0-rc.0.linux-amd64.tar.gz

3.启动
./node_exporter

4.验证启动成功（是否存在指标数据）
http://localhost:9100/metrics

 3.下载安装Prometheus

1.下载
https://prometheus.io/download/

2.解压
tar -zxvf prometheus-2.37.1.linux-amd64.tar.gz

3.修改配置 
prometheus.yml


# my global config
global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).
  external_labels:
    monitor: 'codelab-monitor'
# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          # - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=` to any timeseries scraped from this config.
  - job_name: "node"

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    # static_configs targets 修改为 localhost:9100 代表监控的是 node_exporter
    scrape_interval: 5s
    static_configs:
      - targets: ["localhost:9100"]


4.启动
./prometheus --config.file=prometheus.yml


5.验证（看是否有数据）
http://localhost:9090/graph?

三.配置

1.创建数据源头 

2.配置自己的dashboard 

参考：

Getting started | Prometheus 
Monitoring Linux host metrics with the Node Exporter | Prometheus