Getting started with Kubernetes - deploy docker compose - kubernetes

Question

I am trying to follow the instructions in this tutorial: https://docs.docker.com/docker-for-windows/kubernetes/#use-docker-commands. I have followed these steps:
1) Enable Kubernetes in Docker Desktop.
2) Create a simple asp.net core 3.1 app in Visual Studio 2019 and add container orchestration support (Docker Compose).
3) Run the app in Visual Studio 2019 to confirm it runs successfully in Docker.
4) Run the following command in DOS: docker-compose build kubernetesexample
5) Run the following command in DOS: docker stack deploy --compose-file docker-compose.yml mystack
6) Run the following command in DOS: kubectl get services. Here is the result:
How do I browse to my app? I have tried to browse to: http://localhost:5100 and http://localhost:32442.
Here is my docker-compose.yml:
services:
kubernetesexample:
environment:
- ASPNETCORE_ENVIRONMENT=Development
ports:
- "45678:80"
[1]: https://i.stack.imgur.com/FAkAZ.png
Here is the result of running: kubectl get svc kubernetesexample-published -o yaml:
apiVersion: v1
kind: Service
metadata:
creationTimestamp: "2020-03-14T17:51:41Z"
labels:
com.docker.service.id: mystack-kubernetesexample
com.docker.service.name: kubernetesexample
com.docker.stack.namespace: mystack
name: kubernetesexample-published
namespace: default
ownerReferences:
- apiVersion: compose.docker.com/v1alpha3
blockOwnerDeletion: true
controller: true
kind: Stack
name: mystack
uid: 75f037b1-661c-11ea-8b7c-025000000001
resourceVersion: "1234"
selfLink: /api/v1/namespaces/default/services/kubernetesexample-published
uid: a8e6b35a-35d1-4432-82f7-108f30d068ca
spec:
clusterIP: 10.108.180.197
externalTrafficPolicy: Cluster
ports:
- name: 5100-tcp
nodePort: 30484
port: 5100
protocol: TCP
targetPort: 5100
selector:
com.docker.service.id: mystack-kubernetesexample
com.docker.service.name: kubernetesexample
com.docker.stack.namespace: mystack
sessionAffinity: None
type: LoadBalancer
status:
loadBalancer:
ingress:
- hostname: localhost
Please note the port has now changed:
Update

Answer 1

Service - An abstract way to expose an application running on a set of Pods as a network service.
Rather use Kubernetes documentation. They've interactive, in browser, examples. I see you tried to use LoadBalancer, this must be supported on cloud provider or properly set up environments. All publishing services are summered here. Try using NodePort, simple configuration 'd be eg.:
apiVersion: v1
kind: Service
metadata:
name: np-kubernetesexample
labels:
app: kubernetesexample
spec:
type: NodePort
ports:
port: 5100
protocol: TCP
targetPort: 5100
selector:
app: kubernetesexample
... from what I get gather from provided SCs and description, please check port and labels. If successful, application should be available on localhost:3xxxx, 2nd port described under PORTS when you type kubectl get services, xxxx:3xxxx/TCP.

Answer 2

It seems to work if I change my docker-compose to this:
version: '3.4'
services:
kubernetesexample:
image: kubernetesexample
ports:
- "80:80"
build:
context: .
dockerfile: Dockerfile
Then browse on port 80 i.e. http://localhost.
It does not seem to work on any other port. The video here helped me: https://www.docker.com/blog/docker-windows-desktop-now-kubernetes/