【云原生 | Kubernetes 系列】---Prometheus Blackbox_exporter监控

Prometheus Blackbox_exporter监控

blackbox_exporter是Prometheus官方提供的一个exporter,可以通过Http,Https,Dns,Tcp和ICMP对被监控节点进行数据采集.

在Prometheus中配置监控项,将监控项指向blackbox.blackbox根据监控项再去监控目标

1. 安装blackbox_exporter

# mkdir /apps
# cd /apps
# wget https://github.com/prometheus/blackbox_exporter/releases/download/v0.22.0/blackbox_exporter-0.22.0.linux-amd64.tar.gz
# tar xf blackbox_exporter-0.22.0.linux-amd64.tar.gz
# ln -sf /apps/blackbox_exporter-0.22.0.linux-amd64/blackbox_exporter /usr/bin/
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2. 配置Service文件

/etc/systemd/system/blackbox_exporter.service

[Unit]
Description=Prometheus blackbox_exporter
After=network.target

[Service]
ExecStart=/usr/bin/blackbox_exporter --config.file=/apps/blackbox_exporter-0.22.0.linux-amd64/blackbox.yml --web.listen-address=:9115

[Install]
WantedBy=multi-user.target
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启动服务后在9115启动监听

# systemctl enable --now blackbox_exporter
Created symlink /etc/systemd/system/multi-user.target.wants/blackbox_exporter.service → /etc/systemd/system/blackbox_exporter.service.
# ss -ntl|grep 9115
LISTEN  0       4096                    *:9115                 *:* 
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此时prometheus还没有配置,所以target里是空的

3. 配置Prometheus

3.1 监控url

主要用来监控一些页面状态和SSL证书有效期.

  - job_name: 'http_status'
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['https://www.baidu.com', 'http://192.168.31.201:9090']
        labels:
          instance: http_status
          group: web
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: url
      - target_label: __address__
        replacement: 192.168.31.122:9115
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重启Prometheus服务后,访问blackbox:9115

同时在prometheus里也看到了相关的监控项数据

3.2 监控ICMP

主要用来监控一些网关,vip等ip地址

  - job_name: 'ping_status'
    metrics_path: /probe
    params:
      module: [icmp]
    static_configs:
      - targets: ['192.168.31.101',"192.168.31.114"]
        labels:
          instance: 'ping_status'
          group: 'icmp'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: ip
      - target_label: __address__
        replacement: 192.168.31.122:9115
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重启prometheus,获得了ping_status的监控项

3.3 监控端口

主要用来监视无法直接通过http返回2xx监控的那些服务端口

  - job_name: 'port_status'
    metrics_path: /probe
    params:
      module: [tcp_connect]
    static_configs:
      - targets: ['192.168.31.101:6443', '192.168.31.201:3000','192.168.31.121:22','192.168.31.126:3306']
        labels:
          instance: 'port_status'
          group: 'port'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: ip
      - target_label: __address__
        replacement: 192.168.31.122:9115
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重启prometheus后

4. Grafana 导入

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