如何通过kubectl代理访问该Kubernetes服务?

问题描述

我想通过 kubectl代理服务器访问我的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 ?

I want to access my Grafana Kubernetes service via the kubectl proxy server, but for some reason it won't work even though I can make it work for other services. Given the below service definition, why is it not available on http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana?

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.

The error I'm seeing when accessing the above URL is "no endpoints available for service "grafana"", error code 503.

推荐答案

问题是Grafana的端口名为 web ，因此需要将:web附加到kubectl代理URL : http://localhost:8001/api/v1/proxy/名称空间/监控/服务/grafana:web .

The issue is that Grafana's port is named web, and as a result one needs to append :web to the kubectl proxy URL: http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana:web.

另一种选择是不命名Grafana端口，因为这样您就不必在服务的kubectl代理URL上附加:web: http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana:web .最终，我选择了此选项，因为它更容易.

An alternative, is to instead not name the Grafana port, because then you don't have to append :web to the kubectl proxy URL for the service: http://localhost:8001/api/v1/proxy/namespaces/monitoring/services/grafana:web. I went with this option in the end since it's easier.

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