I'm trying to deploy a Flask python API to Kubernetes (EKS). I've got the Dockerfile setup, but with some weird things going on.

Dockerfile:

FROM python:3.8
 
WORKDIR /app
COPY . /app
 
RUN pip3 install -r requirements.txt
 
EXPOSE 43594

ENTRYPOINT ["python3"]
CMD ["app.py"]

I build the image running docker build -t store-api ..

When I try running the container and hitting an endpoint, I get socker hung up. However, if I run the image doing

docker run -d -p 43594:43594 store-api

I can successfully hit the endpoint with a response.

My hunch is the port mapping.

Now having said all that, running the image in a Kubernetes pod, I cannot get anything back from the endpoint and get socket hung up.

My question is, how do I explicitly add port mapping to my Kubernetes deployment/service?

Part of the Deployment.yaml:

    spec:
      containers:
        - image: store-api
          name: store-api
          ports:
            - containerPort: 43594
          resources: {}
          volumeMounts:
            - mountPath: /usr/local/bin/wait-for-it.sh
              name: store-api-claim0
          imagePullPolicy: Always

Service.yaml:

spec:
  type: LoadBalancer
  ports:
    - port: 43594
      protocol: TCP
      targetPort: 43594
  selector:
    app: store-api
status:
  loadBalancer: {}

If I port forward using kubectl port-forward deployment/store-api 43594:43594 and post the request to localhost:43594/ it works fine.