我还在学习k8s，但我有一个相当简单的设置，据我所知应该工作正常。
我打开了nginx-ingress：

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.0/deploy/static/provider/cloud/deploy.yaml

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应用了入口服务：

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-service
  annotations:
    nginx.ingress.kubernetes.io/use-regex: "true"
    nginx.ingress.kubernetes.io/rewrite-target: /$1
    nginx.ingress.kubernetes.io/enable-cors: "true"
    nginx.ingress.kubernetes.io/cors-allow-origin: "*"
    nginx.ingress.kubernetes.io/cors-allow-methods: "PUT, GET, POST, OPTIONS, DELETE"
    nginx.ingress.kubernetes.io/cors-allow-headers: "DNT,X-CustomHeader,X-LANG,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,X-Api-Key,X-Device-Id,Access-Control-Allow-Origin"
  
spec:
  rules:
  - http:
      paths:
      - path: /?(.*)
        pathType: Prefix
        backend:
          service:
            name: client-service
            port:
              number: 3000
      - path: /api/?(.*)
        pathType: Prefix
        backend:
          service:
            name: server-service
            port:
              number: 5000
  ingressClassName: nginx

型
并拥有前端服务和部署：

apiVersion: v1
kind: Service
metadata:
  name: client-service
spec:
  ports:
    - port: 3000
      protocol: TCP
      targetPort: http-port
  selector:
    app: client
  type: ClusterIP

apiVersion: apps/v1
kind: Deployment
metadata:
  name: client-deployment
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: client
    spec:
      containers:
        - name: client
          image: jowz/client:v4.2
          ports:
            - containerPort: 3000
              name: http-port
  selector:
    matchLabels:
      app: client

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后端服务和部署：

apiVersion: v1
kind: Service
metadata:
  name: server-service
spec:
  ports:
    - port: 5000
      protocol: TCP
  selector:
    app: server
  type: ClusterIP

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-deployment
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: server
    spec:
      containers:
        - name: server
          image: jowz/server:v1
          imagePullPolicy: Always
          ports:
            - containerPort: 5000
              name: nodejs-port
  selector:
    matchLabels:
      app: server

的字符串
但得到了503回应。就调试而言，我遇到的所有问题都是，通常会列出一个错别字或不正确的服务名称。我已经检查了所有这些，我已经查看了每个名称空间中每个服务的“describe”，查看了Selectors中列出的pod，所有都在运行，没有错误。为了更简单地读出数据，下面是kubectl get pods的输出--all-namespaces

NAMESPACE       NAME                                                 READY   STATUS      RESTARTS   AGE
ingress-nginx   client-deployment-9ccf8cf87-7g6qr                    1/1     Running     0          40h
ingress-nginx   ingress-nginx-admission-create-tsp4n                 0/1     Completed   0          44h
ingress-nginx   ingress-nginx-admission-patch-q7spm                  0/1     Completed   1          44h
ingress-nginx   ingress-nginx-controller-86b55bb769-2bqs5            1/1     Running     0          44h
ingress-nginx   mongodb                                              1/1     Running     0          41h
ingress-nginx   server-deployment-df679664f-99nrq                    1/1     Running     0          41h
kube-system     event-exporter-gke-d4b7ff94-4st8l                    2/2     Running     0          2d17h
kube-system     fluentbit-gke-xlv7v                                  2/2     Running     0          2d17h
kube-system     gke-metrics-agent-fhnmq                              2/2     Running     0          2d17h
kube-system     konnectivity-agent-697c66b96-bvfdw                   1/1     Running     0          2d17h
kube-system     konnectivity-agent-autoscaler-864fff96c4-n9tlp       1/1     Running     0          2d17h
kube-system     kube-dns-autoscaler-758c4689b9-7gzx8                 1/1     Running     0          2d17h
kube-system     kube-dns-fc686db9b-hjl4d                             4/4     Running     0          2d17h
kube-system     kube-proxy-gke-octodemo-default-pool-20afc590-94qj   1/1     Running     0          2d17h
kube-system     l7-default-backend-9db4bd868-zgx8s                   1/1     Running     0          2d17h
kube-system     metrics-server-6f6cdbf67d-m6hgv                      1/1     Running     0          40h
kube-system     metrics-server-v0.5.2-66bbcdbffc-bmzp6               2/2     Running     0          2d17h
kube-system     pdcsi-node-st68b                                     2/2     Running     0          40h

型
我在GKE上托管了这个集群，在控制台或日志中也没有列出错误。我不知道还能怎么调试这个。