一、安装与启动

# 二进制安装
wget https://github.com/prometheus/prometheus/releases/download/v2.45.0/prometheus-2.45.0.linux-amd64.tar.gz
tar xzf prometheus-2.45.0.linux-amd64.tar.gz
./prometheus --config.file=prometheus.yml

二、配置文件 (prometheus.yml)

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']

  - job_name: 'node_exporter'
    static_configs:
      - targets: ['10.0.0.91:9100', '10.0.0.92:9100']

三、告警规则

groups:
  - name: node_rules
    rules:
      - alert: NodeDown
        expr: up{job="node_exporter"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "Node {{ $labels.instance }} is down"

四、常用命令

# 查看Targets
curl https://localhost:9090/api/v1/targets

# 查询指标
curl https://localhost:9090/api/v1/query?query=up

# 验证规则
promtool check rules /opt/prometheus/rules/*.yml

# 热加载
curl -X POST https://localhost:9090/-/reload

五、Node Exporter

# 启动
./node_exporter --web.listen-address=:9100

# 常用指标
node_cpu_seconds_total
node_memory_MemAvailable_bytes
node_memory_MemTotal_bytes
node_filesystem_size_bytes

六、快捷命令速查