I have openshift namespace (SomeNamespace), in that namespace I have several pods.

I have route associated to that namespace (SomeRoute).

In one of pods I have my spring application. It has REST controllers.

I want to send message to that REST controller, how can I do it?

I have route URL https://some.namespace.company.name, what should I find next?

I tried to send requests to https://some.namespace.company.name/rest/api/route , but it didnt work. I guess, I must somehow specify pod in my URL, so route will redirect requests to concrete pod but I dont know how I can do it

CodePudding user response：

You don't need to specify the pod in the route.

The chain goes like this:

• Route exposes a given port of a Service
• Service selects some pod to route the traffic to by its .spec.selector field

You need to check your Service and Route definitions.

Example service and route (including only the related parts of the resources):

Service

spec:
  ports:
  - name: 8080-tcp
    port: 8080
    protocol: TCP
    targetPort: 8080
  selector:
    <label-key>: <label-value>

Where label-key and label-value is any label key-value combination that selects your pod with the http application.

Route

spec:
  port:
    targetPort: 8080-tcp <port name of the service>
  to:
    kind: Service
    name: <service name>

When your app exposes some endpoint on :8080/rest/api, you can invoke it with <route-url>/rest/api

You can try it out with some example application (some I found randomly on github, to verify everything works correctly on your cluster):

• create a new app using s2i build from github repository: oc new-app registry.redhat.io/openjdk/openjdk-11-rhel7~https://github.com/redhat-cop/spring-rest

• wait until the s2i build is done and the pod is started

• expose the service via route: oc expose svc/spring-rest

• grab the route url: oc get route spring-rest -o jsonpath='{.spec.host}'

• invoke the api: curl -k <route-url>/v1/greeting

• response should be something like: {"id":3,"content":"Hello, World!"}