Prometheus使用blackbox_exporter監控端口及網站狀態（七）

一、blackbox_exporter應用場景

HTTP 測試： 定義 Request Header 信息、判斷 Http status / Http Respones Header / Http Body 內容
TCP 測試：   業務組件端口狀態監聽、應用層協議定義與監聽
ICMP 測試： 主機探活機制
POST 測試： 接口聯通性
SSL證書過期時間

二、blackbox_exporter安裝

# wget https://github.com/prometheus/blackbox_exporter/releases/download/v0.16.0/blackbox_exporter-0.16.0.linux-amd64.tar.gz

# tar xf blackbox_exporter-0.16.0.linux-amd64.tar.gz -C /usr/local/
# ln -s /usr/local/blackbox_exporter-0.16.0.linux-amd64/ /usr/local/blackbox_exporter

# 使用systemd進行管理blackbox_exporter服務
# vim /usr/lib/systemd/system/blackbox_exporter.service
[Unit]
Description=blackbox_exporter
After=network.target

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

[Install]
WantedBy=multi-user.target

# systemctl daemon-reload
# systemctl start blackbox_exporter.service 
# systemctl enable blackbox_exporter.service 

三、配置prometheus采集數據

# cd /usr/local/prometheus
# vim prometheus.yml
# my global config
global:
  scrape_interval:     15s
  evaluation_interval: 15s
alerting:
  alertmanagers:
  - static_configs:
    - targets:
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"
scrape_configs:
  - job_name: 'prometheus'

    static_configs:
    - targets: ['192.168.5.237:9090']

  - job_name: 'node'
    file_sd_configs:
    - refresh_interval: 30s
      files: 
      - "/usr/local/prometheus/sd_config/node*.yml"

  - job_name: 'docker'
    static_configs:
    - targets: ['192.168.5.85:8080']

  - job_name: 'mysql'
    static_configs:
    - targets: ['192.168.5.237:9104']
      labels:
        app: zabbix-server-mysql

# 網站監控
  - job_name: 'http_status'
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['http://www.lzfn.com', 'wiki.lzfn.com']
        labels:
          instance: http_status
          group: web
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 192.168.5.85:9115

# ping 檢測
  - job_name: 'ping_status'
    metrics_path: /probe
    params:
      module: [icmp]
    static_configs:
      - targets: ['192.168.5.85']
        labels:
          instance: 'ping_status'
          group: 'icmp'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 192.168.5.85:9115

# 端口監控
  - job_name: 'port_status'
    metrics_path: /probe
    params:
      module: [tcp_connect]
    static_configs:
      - targets: ['192.168.5.85:80', '192.168.5.85:9000', '192.168.5.85:8080']
        labels:
          instance: 'port_status'
          group: 'port'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - target_label: __address__
        replacement: 192.168.5.85:9115

# 檢查配置文件並重啟服務
# ./promtool check config prometheus.yml 
Checking prometheus.yml
  SUCCESS: 0 rule files found

# systemctl restart prometheus.service

四、配置Grafana展示數據

使用9965模板，需要安裝餅狀態圖插件，安裝后重啟grafana

grafana-cli plugins install grafana-piechart-panel
systemctl restart grafana-server.service