Kubernetes Crash Course for .NET Developers (2026) – Part 2

1) create dotnet project

dotnet new blazor -n K8sDemo

insert this into K8sDemo.csproj

<PropertyGroup>
    <ContainerImageTags>latest</ContainerImageTags>
    <ContainerRepository>ramboe/k8sdemo</ContainerRepository>
    <ContainerRegistry>docker.io</ContainerRegistry>
  </PropertyGroup>

• this pushes the image into https://hub.docker.com/repositories/ramboe (make sure to replace with your own stuff unless you hacked my account, ofc)

• further reading on dotnet container properties: https://github.com/dotnet/sdk-container-builds/blob/main/docs/RegistryAuthentication.md#docker-hub

2) push image into docker hub

dotnet publish K8sDemo.csproj --os linux --arch x64 /t:PublishContainer -c Release

3) install kubernetes for local testing

sudo pacman -S minikube kubectl
minikube start
kubectl get all

we don't need to install kubectl BUT in order to interact with minikube via the cli we would need to execute every kubectl command with the minikube prefix.

check if cluster is running

kubectl cluster-info

4) pull image to target machine

deployment.yml (can technically sit anyware on the system)

apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-deployment
  annotations:
    kubernetes.io/change-cause: "init"
spec:
  replicas: 3
  selector:
    matchLabels:
      app: demo
  template:
    metadata:
      labels:
        env: prod
        app: demo
        app.kubernetes.io/name: demo
    spec:
      containers:
        - name: demo
          image: ramboe/k8sdemo:latest
          ports:
            - containerPort: 80
              name: http-frontend
          env:
            - name: ASPNETCORE_URLS
              value: http://+:80

run the deployment

kubectl apply -f deployment.yaml

check the deployment

kubectl get all

expected output

NAME                                   READY   STATUS              RESTARTS   AGE
pod/demo-deployment-85c8544d98-5tctg   0/1     ContainerCreating   0          8s
pod/demo-deployment-85c8544d98-gppxj   0/1     ContainerCreating   0          8s
pod/demo-deployment-85c8544d98-pdzgd   0/1     ContainerCreating   0          8s

NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   42m

NAME                              READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/demo-deployment   0/3     3            0           8s

NAME                                         DESIRED   CURRENT   READY   AGE
replicaset.apps/demo-deployment-85c8544d98   3         3         0       8s

check labels

kubectl get pods --show-labels

ClusterIP 10.96.0.1 - can't browse this right now, need service

5) make it browsable

add service to yaml

...

---
apiVersion: v1
kind: Service
metadata:
  name: lb-service
spec:
  selector:
    app.kubernetes.io/name: demo
  ports:
    - name: demo-port
      protocol: TCP
      port: 8080
      targetPort: 80
  type: LoadBalancer

re-apply yml

kubectl apply -f deployment.yaml  

6) fix minikube tunneling

https://minikube.sigs.k8s.io/docs/handbook/accessing/

minikube tunnel in separate terminal

expected output

Status:
	machine: minikube
	pid: 42099
	route: 10.96.0.0/12 -> 192.168.49.2
	minikube: Running
	services: [my-lb-service]
    errors:
		minikube: no errors
		router: no errors
		loadbalancer emulator: no errors

7) recheck

kubectl get svc

expected output

NAME            TYPE           CLUSTER-IP      EXTERNAL-IP     PORT(S)          AGE
kubernetes      ClusterIP      10.96.0.1       <none>          443/TCP          58m
my-lb-service   LoadBalancer   10.101.206.97   10.101.206.97   8080:31265/TCP   9m54s

browse localhost (external-ip +port), in this case 10.101.206.97:8080