I am new to Kubernetes so I am a little lost.

I can't for the life of me get this to connect.

It is a golang application using Kubernetes. The docker file runs just fine, the pod launches but the connection times out.

apiVersion: v1
kind: Service
metadata:
  name:  ark-service
  namespace: ark
spec:
  type: NodePort
  ports:
    - port: 80
      targetPort: 8080
      nodePort: 30008
  selector:
    app: ark-api
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: ark-backend
  namespace: ark
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ark-api
  template:
    metadata:
      labels:
        app: ark-api
    spec:
      imagePullSecrets:
        - name: regcred
      containers:
        - name: ark-api-container
          image: xxx
          imagePullPolicy: Always
          resources:
            limits:
              memory: "128Mi"
              cpu: "500m"
          ports:
            - name: web
              containerPort: 8080

CodePudding user response：

1. You could check wheather the port 8080 is listening inside the container
   kubectl exec -it <pod_namen> -n <namespace> -- netstat -ntpl
   if there is no netstat command in the container, you could try to build a base image with it.
2. Check whether the port 30080 is listening on the node. Run the following command on the node
   netstat -ntpl | grep 30080
   Also you could try not to specify the node port in the service yaml, let the kubernetes to choose the nodeport for you. That could avoid to specify the port which is already using in your node.

CodePudding user response：

apiVersion: v1
kind: Service
metadata:
  name: ark-service
  namespace: ark
spec:
  type: ClusterIP
  selector:
    component: ark-api
  ports:
    - port: 80
      targetPort: 8080

Try using clusterIP instead of nodeport, if you are using any kind of Ingress then you have to create rules in your ingress config so It can expose your service to the outside web via your load balancer.