proxy - 如何通过kubectl代理访问该Kubernetes服务？

Question

我想通过kubectl proxy server访问我的Grafana Kubernetes服务，但是由于某种原因，即使我可以将其用于其他服务，该服务也无法使用。给定以下服务定义，为什么在http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana上不可用？

grafana-service.yaml

apiVersion: v1
kind: Service
metadata:
  namespace: monitoring
  name: grafana
  labels:
    app: grafana
spec:
  type: NodePort
  ports:
  - name: web
    port: 3000
    protocol: TCP
    nodePort: 30902
  selector:
    app: grafana

grafana-deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  namespace: monitoring
  name: grafana
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: grafana
    spec:
      containers:
      - name: grafana
        image: grafana/grafana:4.1.1
        env:
        - name: GF_AUTH_BASIC_ENABLED
          value: "true"
        - name: GF_AUTH_ANONYMOUS_ENABLED
          value: "true"
        - name: GF_SECURITY_ADMIN_USER
          valueFrom:
            secretKeyRef:
              name: grafana-credentials
              key: user
        - name: GF_SECURITY_ADMIN_PASSWORD
          valueFrom:
            secretKeyRef:
              name: grafana-credentials
              key: password
        volumeMounts:
        - name: grafana-storage
          mountPath: /var/grafana-storage
        ports:
        - name: web
          containerPort: 3000
        resources:
          requests:
            memory: 100Mi
            cpu: 100m
          limits:
            memory: 200Mi
            cpu: 200m
      - name: grafana-watcher
        image: quay.io/coreos/grafana-watcher:v0.0.5
        args:
          - '--watch-dir=/var/grafana-dashboards'
          - '--grafana-url=http://localhost:3000'
        env:
        - name: GRAFANA_USER
          valueFrom:
            secretKeyRef:
              name: grafana-credentials
              key: user
        - name: GRAFANA_PASSWORD
          valueFrom:
            secretKeyRef:
              name: grafana-credentials
              key: password
        resources:
          requests:
            memory: "16Mi"
            cpu: "50m"
          limits:
            memory: "32Mi"
            cpu: "100m"
        volumeMounts:
        - name: grafana-dashboards
          mountPath: /var/grafana-dashboards
      volumes:
      - name: grafana-storage
        emptyDir: {}
      - name: grafana-dashboards
        configMap:
          name: grafana-dashboards

访问上述URL时出现的错误是“服务无可用端点” grafana”，错误代码503。

Answer 1

正如Michael所说，您的标签或 namespace 很可能不匹配。但是，除此之外，请记住，即使在修复端点时，后面的网址(http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana)也可能无法正常工作。

取决于您的root_url和/或static_root_path grafana配置设置，尝试登录时，您可能会得到grafana尝试POST到http://localhost:8001/login并获得404。

尝试改用kubectl port-forward:
kubectl -n monitoring port-forward [grafana-pod-name] 3000
然后通过http://localhost:3000/访问grafana

https://kubernetes.io/docs/tasks/access-application-cluster/port-forward-access-application-cluster/