一、Blackbox Exporter 部署

Exporter Configmap 定义，可以参考下面两个链接

https://github.com/prometheus/blackbox_exporter/blob/master/CONFIGURATION.md

https://github.com/prometheus/blackbox_exporter/blob/master/example.yml

首先得声明一个 Blackbox 的 Deployment，并利用 Configmap 来为 Blackbox 提供配置文件。

Configmap：

参考 BlackBox Exporter 的 Github 提供的示例配置文件

[root@master01 7]# vim blackbox-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: blackbox-exporter
  namespace: monitor
  labels:
    app: blackbox-exporter
data:
  blackbox.yml: |-
    modules:
      ## ----------- DNS 检测配置 -----------
      dns_tcp:
        prober: dns
        dns:
          transport_protocol: "tcp"
          preferred_ip_protocol: "ip4"
          query_name: "kubernetes.default.svc.cluster.local" # 用于检测域名可用的网址
          query_type: "A"
      ## ----------- TCP 检测模块配置 -----------
      tcp_connect:
        prober: tcp
        timeout: 5s
      ## ----------- ICMP 检测配置 -----------
      icmp:
        prober: icmp
        timeout: 5s
        icmp:
          preferred_ip_protocol: "ip4"
      ## ----------- HTTP GET 2xx 检测模块配置 -----------
      http_get_2xx:
        prober: http
        timeout: 10s
        http:
          method: GET
          preferred_ip_protocol: "ip4"
          valid_http_versions: ["HTTP/1.1","HTTP/2"]
          valid_status_codes: [200]           # 验证的HTTP状态码,默认为2xx
          no_follow_redirects: false          # 是否不跟随重定向
      ## ----------- HTTP GET 3xx 检测模块配置 -----------
      http_get_3xx:
        prober: http
        timeout: 10s
        http:
          method: GET
          preferred_ip_protocol: "ip4"
          valid_http_versions: ["HTTP/1.1","HTTP/2"]
          valid_status_codes: [301,302,304,305,306,307]  # 验证的HTTP状态码,默认为2xx
          no_follow_redirects: false                     # 是否不跟随重定向
      ## ----------- HTTP POST 监测模块 -----------
      http_post_2xx:
        prober: http
        timeout: 10s
        http:
          method: POST
          preferred_ip_protocol: "ip4"
          valid_http_versions: ["HTTP/1.1", "HTTP/2"]
          #headers:                             # HTTP头设置
          #  Content-Type: application/json
          #body: '{}'                           # 请求体设置

Deployment：

[root@master01 7]# vim blackbox-exporter.yaml
apiVersion: v1
kind: Service
metadata:
  name: blackbox-exporter
  namespace: monitor
  labels:
    k8s-app: blackbox-exporter
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 9115
    targetPort: 9115
  selector:
    k8s-app: blackbox-exporter
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: blackbox-exporter
  namespace: monitor
  labels:
    k8s-app: blackbox-exporter
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: blackbox-exporter
  template:
    metadata:
      labels:
        k8s-app: blackbox-exporter
    spec:
      containers:
      - name: blackbox-exporter
        image: registry.cn-hangzhou.aliyuncs.com/abroad_images/blackbox-exporter:v0.21.0
        imagePullPolicy: IfNotPresent
        args:
        - --config.file=/etc/blackbox_exporter/blackbox.yml
        - --web.listen-address=:9115
        - --log.level=info
        ports:
        - name: http
          containerPort: 9115
        resources:
          limits:
            cpu: 200m
            memory: 256Mi
          requests:
            cpu: 100m
            memory: 50Mi
        livenessProbe:
          tcpSocket:
            port: 9115
          initialDelaySeconds: 5
          timeoutSeconds: 5
          periodSeconds: 10
          successThreshold: 1
          failureThreshold: 3
        readinessProbe:
          tcpSocket:
            port: 9115
          initialDelaySeconds: 5
          timeoutSeconds: 5
          periodSeconds: 10
          successThreshold: 1
          failureThreshold: 3
        volumeMounts:
        - name: config
          mountPath: /etc/blackbox_exporter
      volumes:
      - name: config
        configMap:
          name: blackbox-exporter
          defaultMode: 420


# 部署

[root@master01 7]# kubectl apply -f blackbox-configmap.yaml

[root@master01 7]# kubectl apply -f blackbox-exporter.yaml

# 查看部署后的资源

[root@master01 7]# kg all -nmonitor |grep blackbox

pod/blackbox-exporter-8765d9478-8tl4z    1/1     Running   0             37s

service/blackbox-exporter    ClusterIP   192.168.208.118   <none>        9115/TCP            37s

deployment.apps/blackbox-exporter    1/1     1            1           37s

replicaset.apps/blackbox-exporter-8765d9478     1         1         1       37s

定义 BlackBox 在 Prometheus 抓取设置