Kubernetes 之 Prometheus 监控 blackbox_exporter

下载地址：https://prometheus.io/download/#blackbox_exporter

#blackbox_exporter 是 Prometheus 官方提供的一个exporter,可以监控 HTTP、HTTPS,、DNS、 TCP 、ICMP 等目标实例，
#从而实现对被监控节点进行监控和数据采集。

#HTTP/HTPPS: URL/API可用性检测
#TCP: 端口监听检测
#ICMP: 主机存活检测
#DNS: 域名解析

#1、下载blackbox_exporter、部署
wget https://github.com/prometheus/blackbox_exporter/releases/download/v0.23.0/blackbox_exporter-0.23.0.linux-amd64.tar.gz
[root@xksnode2 prometheus]# tar zxvf blackbox_exporter-0.23.0.linux-amd64.tar.gz
[root@xksnode2 blackbox_exporter-0.23.0.linux-amd64]# cp blackbox_exporter /usr/local/bin/
[root@xksnode2 blackbox_exporter-0.23.0.linux-amd64]# vim /etc/systemd/system/blackbox-exporter.service
[Unit]
Description=Prometheus Blackbox Exporter
After=network.target

[Service]
Type=simple
User=root
Group=root
ExecStart=/usr/local/bin/blackbox_exporter \
                --config.file=/root/prometheus/blackbox_exporter/blackbox.yml \
                --web.listen-address=:9115
Restart=on-failure

[Install]
WantedBy=multi-user.target

[root@xksnode2 blackbox_exporter]# systemctl restart blackbox-exporter.service
[root@xksnode2 blackbox_exporter]# systemctl status blackbox-exporter.service
[root@xksnode2 blackbox_exporter]# systemctl enalbe blackbox-exporter.service


[root@xksnode2 blackbox_exporter]# netstat -nltp | grep 9115
tcp6       0      0 :::9115                 :::*                    LISTEN      29722/blackbox_expoerter

#2、测试访问
http://192.168.19.182:9115/

#3、实现URL监控
#prometheus 调用 blackbox exporter 实现对 URL/ICMP 的监控

 - job_name: 'http_status'
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets: ['http://www.xiaomi.com', 'http://www.magedu.com']
        labels:
          instance: http_status
          group: web
    relabel_configs:
      - source_labels: [__address__] #将__address__(当前监控目标URL地址的标签)修改为__param_target,用于传递给blackbox_exporter
        target_label: __param_target #标签key为__param_target、value为www.xiaomi.com。key为__param_target、value为www.magedu.com
      - source_labels: [__param_target] #基于__param_target获取监控目标
        target_label: url #将监控目标的值与url创建一个label
      - target_label: __address__  #新添加一个目标__address__，指向blackbox_exporter服务器地址，用于将监控请求发送给指定的blackbox_exporter服务器
        replacement: 192.168.19.182:9115 #指定blackbox_exporter服务器地址
 
#4、实现ICMP监控
[root@xksmaster1 yaml]# cat /apps/prometheus/prometheus.yml
# icmp 检测
  - job_name: 'ping_status'
    metrics_path: /probe
    params:
      module: [icmp]
    static_configs:
      - targets: ['172.31.0.2',"223.6.6.6","192.168.19.2"]
        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: 192.168.19.182:9115

[root@xksmaster1 yaml]# systemctl restart prometheus

 
#5、实现端口监控
[root@xksmaster1 yaml]# cat /apps/prometheus/prometheus.yml
# 端口监控
  - job_name: 'port_status'
    metrics_path: /probe
    params:
      module: [tcp_connect]
    static_configs:
      - targets: ['192.168.19.180:9090', '192.168.19.181:3000','192.168.19.182:80']
        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: 192.168.19.182:9115

[root@xksmaster1 yaml]# systemctl restart prometheus

#6、Grafana导入模板-13587、9965