Prometheus - SSL 证书过期监控

一、环境

1. 数据采集：

   Exporter：blackbox_exporter

   Version：0.22.0

   Exporter 下载：https://prometheus.io/download/#blackbox_exporter

2. 数据存储：

   Aplica：Prometheus

   Version：2.37.0

3. 数据展示：

   Aplica：Grafana

   Version：9.0.3

   Dashboards：https://grafana.com/grafana/dashboards/

   Dashboard ID（SSL 证书监控）：13230

   Dashboard ID（HTTP 状态监控）：13659

   Dashboard ID（SSL TCP HTTP 监控）：9965

二、部署 Exporter

2.1 配置 blackbox_exporter

1、下载 blackbox_exporter 并上传至服务器

2、解压 blackbox_exporter

tar xzf blackbox_exporter-0.22.0.linux-amd64.tar.gz -C /home/data/prometheus/exporters/
cd /home/data/prometheus/exporters/
mv blackbox_exporter-0.22.0.linux-amd64 blackbox_exporter

3、修改配置文件

blackbox_exporter 以模块的方式工作，如果你仅仅是获取 SSL 证书过期时间，那部署在任意节点即可。

cd /home/data/prometheus/exporters/blackbox_exporter
vim blackbox.yml  # 启用http_2xx模块

modules:
  http_2xx:
    prober: http
    timeout: 30s
    http:
      valid_http_versions: ["HTTP/1.1", "HTTP/2"]
      valid_status_codes: [200]
      method: GET
      preferred_ip_protocol: "ip4"

4、配置 systemd 管理

vim /usr/lib/systemd/system/blackbox_exporter.service

[Unit]
Description=blackbox_exporter
After=network.target

[Service]
User=prometheus
Group=prometheus
WorkingDirectory=/home/data/prometheus/exporters/blackbox_exporter
ExecStart=/home/data/prometheus/exporters/blackbox_exporter/blackbox_exporter

[Install]
WantedBy=multi-user.target

5、启动 blackbox_exporter

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

2.2 配置 Prometheus

1、修改配置文件

vim /home/data/prometheus/etc/prometheus.yml

# 添加JOB

...
...
  - job_name: 'blackbox_http_2xx'
    metrics_path: /probe
    params:
      module: [http_2xx]
    static_configs:
      - targets:
        - https://blog.rabcnops.cn
        - https://www.baidu.com
        ...
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 192.168.56.141:9115
...
...

2、重启（或热加载）Prometheus

docker restart prometheus

2.3 Grafana 监控面板

1、导入模板（在文章开头已经给出模板 ID）

2、查看最终效果