Why can’t I access my nginx pod on localhost:8080 in Kubernetes?

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I deployed an nginx container in Kubernetes but when I access http://localhost:8080 in Chrome, I get an ERR_EMPTY_RESPONSE error.

I used the following deployment file:

YAML
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-deploy
spec:
  replicas: 10
  selector:
    matchLabels:
      app: hello-world
  revisionHistoryLimit: 5
  progressDeadlineSeconds: 300
  minReadySeconds: 10
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
      maxSurge: 1
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-pod
        image: nginx
        ports:
        - containerPort: 8080
        resources:
          limits:
            memory: 128Mi
            cpu: 0.1

All pods are running as confirmed by:

BASH
$ kubectl get pods
NAME                           READY   STATUS    RESTARTS   AGE
hello-deploy-7c547fdb4-2tpnc   1/1     Running   0          18m
hello-deploy-7c547fdb4-4kjtt   1/1     Running   0          18m
hello-deploy-7c547fdb4-6cvmt   1/1     Running   0          18m
hello-deploy-7c547fdb4-9gvj6   1/1     Running   0          18m
hello-deploy-7c547fdb4-ctjxx   1/1     Running   0          18m
hello-deploy-7c547fdb4-ggl6n   1/1     Running   0          18m
hello-deploy-7c547fdb4-m528n   1/1     Running   0          18m
hello-deploy-7c547fdb4-mg9gf   1/1     Running   0          18m
hello-deploy-7c547fdb4-t9srq   1/1     Running   0          18m
hello-deploy-7c547fdb4-zcjkt   1/1     Running   0          18m

I also defined a service:

YAML
apiVersion: v1
kind: Service
metadata:
  name: lb-svc
  labels:
    app: hello-world
spec:
  type: LoadBalancer
  ports:
  - port: 8080
    protocol: TCP
  selector:
    app: hello-world

The service is running as shown by:

BASH
$ kubectl get svc lb-svc
NAME     TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
lb-svc   LoadBalancer   10.100.237.251   localhost     8080:31527/TCP   10m

However, when I browse to http://localhost:8080, nothing loads. I suspect the issue is related to the port configuration—possibly the nginx image is not listening on port 8080. What am I doing wrong and how can I fix it?

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Answers 1

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1 Answer

Answer by StackOverflow TychoAI Agent • 1 month ago

The issue is that the nginx container is not configured to listen on port 8080. By default, the official nginx image listens on port 80. Your deployment file declares a containerPort of 8080 and your Service is exposing port 8080 (using it as the targetPort since none is specified), but since the container isn’t actually serving on port 8080, the Service isn’t receiving any traffic from the pods.

To fix this, you can either:

Update the container’s command or configuration in your deployment so that nginx listens on port 8080, or
Change the containerPort (and Service targetPort if needed) to 80 so that the Service routes traffic to the actual port on which nginx is listening.

For example, to change the Service to route to the default nginx port, modify your Service as follows:

YAML
apiVersion: v1
kind: Service
metadata:
  name: lb-svc
  labels:
    app: hello-world
spec:
  type: LoadBalancer
  ports:
  - port: 8080
    targetPort: 80
    protocol: TCP
  selector:
    app: hello-world

This way, external traffic hitting port 8080 on the Service will be forwarded to port 80 on the pods running nginx.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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Why can’t I access my nginx pod on localhost:8080 in Kubernetes?

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