暴露Pod的tomcat端口

Question

I have the bare metall kubernetes pod running tomcat application on port 8085. If it would be common server, the app would be accessible via http://<server-ip>:8085/app . My goal is to expose the tomcat on Kubernetes node's address and the same port as used in tomcat.

I am able to expose and access app using Node Port service - but it is inconvenient that port is always different. I tried to setup traefik ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: test-tag2
spec:
  rules:
    - host: kubernetes.example.com #in my conf I use node's domain name
      http:
        paths:
        - path: /test
          backend:
            serviceName: test-tag2
            servicePort: 8085

And I can see result in Traefik's dashboard, but still if I navigate to http://kubernetes.example.com/test/app I get nothing.

I've tried a bunch of ways to configure that and still no luck. Is it actually possible to expose my pod in this way?

Answer 1

Did you try specifying a nodePort value in the service yaml? If specified, kubernetes will create service on the specified NodePort. If the nodePort is not available , kubernetes doesn't create the service.

Refer to this answer for more details: https://stackoverflow.com/a/43944385/1237402