Deploying a dotnetcore app on Kubernetes

Deploy an application dotnetcore on Kubernetes locally

Installing application dotnetcore demo:

# cloning the codegit clone https://github.com/dotnet/dotnet-docker

Running the app locally:

Navigate to the project folder at dotnet-docker/samples/aspnetapp/aspnetapp.

dotnet run

Go to http://localhost:5000 in a browser to test the app.

Press Ctrl+C at the command prompt to stop the app.

Building the application on Docker container:

Navigate to the Dockerfile folder at dotnet-docker/samples/aspnetapp.

Run the following commands to build sample in Docker:

docker build -t aspnetapp .

Pushing the image to Docker Hub:

# this example I'm using Ubuntusudo docker tag aspnetpp rondweb/dotnetcore:aspnetappsudo docker push rondweb/dotnetcore:aspnetapp

So, we already have our docker image stored in Docker Hub and now we have to create our manifest file to publish our app on Kubernetes locally.

apiVersion: apps/v1kind: Deploymentmetadata:  name: aspnetcoreapp  labels:    app: aspnetcoreappspec:  replicas: 1  selector:    matchLabels:      app: aspnetcoreapp  template:    metadata:      labels:        app: aspnetcoreapp    spec:      containers:      - name: aspnetcoreapp        image: rondweb/dotnetcore:aspnetapp        ports:        - containerPort: 80        resources:          requests:            cpu: 100m            memory: 100Mi          limits:            cpu: 200m            memory: 200Mi---apiVersion: v1kind: Servicemetadata:  name: aspnetcoreapp-servicespec: type: LoadBalancer ports: - port: 80 selector:   app: aspnetcoreapp---apiVersion: networking.k8s.io/v1beta1kind: Ingressmetadata:  name: aspnetcoreapp-ingress  labels:    app: aspnetcoreapp-ingressspec:  rules:  - http:      paths:      - path: /        backend:          serviceName: aspnetcoreapp-service          servicePort: 80          

[git-github-checkout url=”https://github.com/rondweb/kubernetes/blob/dotnetcore/k8s.yml”]

Now let’s install our app on Kubernetes:

kubectl apply -f https://bit.ly/3ndrgeR

After the installation you can check if everything is ok:

kubectl get all

If everything is ok, you can see the app running!

To navigate and test the app:

kubectl port-forward service/aspnetcoreapp-service 8000:80

Navigate to the url: http://localhost:8000/ and check your new app running on Kubernetes! 🙂

Reference: https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/docker/building-net-docker-images?view=aspnetcore-5.0