blackbox_exporter

[TOC]

原文连接：https://blog.51cto.com/yuyiff/4138105

一 简介

官网下载地址：https://github.com/prometheus/blackbox_exporter/releases/tag/v0.23.0
blackbox_exporter是Prometheus 官方提供的 exporter 之一，可以提供 http、dns、tcp、icmp 的监控数据采集。
Blackbox_exporter 应用场景

支持类型 解释
HTTP 定义 Request Header 信息，判断 Http status / Http Respones Header / Http Body 内容
TCP 业务组件端口状态监听 应用层协议定义与监听
ICMP 主机探活机制
POST 接口联通性
SSL SSL 证书过期时间-

二 部署

cd /data
wget https://github.com/prometheus/blackbox_exporter/releases/download/v0.23.0/blackbox_exporter-0.23.0.linux-amd64.tar.gz
tar xf blackbox_exporter-0.23.0.linux-amd64.tar.gz 
mv blackbox_exporter-0.23.0.linux-amd64 blackbox_exporter
cd blackbox_exporter

2.1 主配置文件

2.2 开机启动

cat > /etc/systemd/system/blackbox_exporter.service <<'EOF'
[Unit]
Description=blackbox_exporter
After=network.target

[Service]
User=root
Type=simple
ExecStart=/data/blackbox_exporter/blackbox_exporter --config.file=/data/blackbox_exporter/blackbox.yml
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable blackbox_exporter.service
systemctl restart blackbox_exporter.service
systemctl status blackbox_exporter.service

三 prometheus.yml中加入blackbox_exporter

vim prometheus.yml
- job_name: crawler_status
    metrics_path: /probe
    params:
      module: [icmp]
    static_configs:
      - targets: ['10.45.3.8','10.45.3.9','10.45.3.10','10.45.3.11']
        labels:
          instance: node_status
          group: 'node'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:9115 #Blackbox_exporter

注意：10.45.3.8是被监控端ip，127.0.0.1是Blackbox_exporter

四 监控主机端口存活状态

- job_name: 'crawler_port_status'
    metrics_path: /probe
    params:
      module: [tcp_connect]
    static_configs:
      - targets: ['10.45.3.8:3128']
        labels:
          instance: 'port_status'
          group: 'tcp'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:9115

五 监控网站状态



- job_name: qianxin_web_status
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['https://www.qianxin.com']
        labels:
          instance: qianxin_web_status
          group: 'web'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 127.0.0.1:9115

- job_name: baidu_web_status
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['https://www.baidu.com']
        labels:
          instance: baidu_web_status
          group: 'web'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 127.0.0.1:9115

- job_name: jd_web_status
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['https://www.jd.com']
        labels:
          instance: jd_web_status
          group: 'web'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 127.0.0.1:9115

六 检查配置文件是否书写正确

./promtool check config prometheus.yml

七 查看targets界面

访问  http://127.0.0.1:9090/targets ,确保状态为 UP