set up a basic Nodejs Express API

0 votes

I am new to K8s and this is my first time trying to get to grips with it. I am trying to set up a basic Nodejs Express API using this deployment.yml:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: api
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: api
    spec:
      containers:
      - image: registry.gitlab.com/<project>/<app>:<TAG>
        imagePullPolicy: Always
        name: api
        env:
        - name: PORT
          value: "8080"
        ports:
          - containerPort: 8080
            hostPort: 80
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 30
          timeoutSeconds: 1
        readinessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 30
          timeoutSeconds: 1
      imagePullSecrets:
        - name: registry.gitlab.com

Which is being deployed via gitlab-ci. This is working and I have set up a service to expose it:

apiVersion: v1
kind: Service
metadata:
  name: api-svc
  labels:
    app: api-svc
spec:
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
    name: http
  selector:
    app: api
  type: LoadBalancer

I went through a lot of blogs and documnetations, it said i need to create an ingress.yaml file and i did create it 

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
spec:
  backend:
    serviceName: api-svc
    servicePort: 80

But when I visit the external IP address that was generated from the ingress and I just 502 error pages.

Sep 21, 2018 in Power BI by Hannah
• 18,410 points
99 views

1 answer to this question.

0 votes

In order for Ingress to work on GCE you need to define your backend service das a NodePort not as ClusterIP or LoadBalancer.

Change the port in your service.yaml file

apiVersion: v1
kind: Service
metadata:
  name: api-svc-v2
  labels:
    app: api-svc-v2
spec:
  type: NodePort
  ports:
  - port: 80
    targetPort: 8080
    nodePort: 31810
    protocol: TCP
    name: http
  selector:
    app: backend-api-v2

answered Sep 21, 2018 by Kalgi
• 51,970 points

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