Overview of Continuous Delivery
In this Post , We’ll share the Process how you can Develop and Deploy .NET Application using Docker and Kubernetes and Adopt DevOps in existing .NET Applications
Continuous delivery is a branch of continuous integration. It concentrates on automating the software delivery process so that teams can quickly and confidently deploy their code to production at any point.
Prerequisites for Implementing Continuous Delivery
To follow this guide you need
Kubernetes – Kubernetes is an open source platform that automates container operations and Minikube is best for testing Kubernetes.
Shared Persistent Storage – Shared Persistent Storage is permanent storage that we can attach to the Kubernetes container so that we don`t lose our data even container died. We will be using GlusterFS as a persistent data store for Kubernetes container applications.
.NET Application Source Code – Application Source Code is source code that we want to run inside a kubernetes container.
Dockerfile – Dockerfile contains a bunch of commands to build .NET application.
Container-Registry – The Container Registry is an online image store for container images.
Below mentioned options are few most popular registries.
Create a Dockerfile
The below-mentioned code is sample dockerfile for .NET applications. In which we are using Microsoft .NET 1.1 SDK for .NET Application.
Building .NET Application Image
The below-mentioned command will build your application container image.
Publishing Container Image
Now we publish our .NET application container images to any container registry like Docker Hub, AWS ECR, Google Container Registry, Private Docker Registry.
We are using Azure Container Registry for publishing Container Images.
Now Click The Link to Pull and Push to Azure Container Registry.
Similarly, we can Push or Pull any container image to any of the below-mentioned Container Registry like Docker Hub, AWS ECR, Private Docker Registry, Google Container Registry etc.
Creating Deployment Files for Kubernetes
Deploying application on kubernetes with ease using deployment and service files either in JSON or YAML format.
Following Content is for “<name of application>.deployment.yml” file of Python container application.
Following Content is for “<name of application>.service.yml” file of Python container application.
Running .NET Application on Kubernetes
.NET Application Container can be deployed either by kubernetes Dashboard or Kubectl (Command line).
I`m explaining command line that you can use in production Kubernetes cluster.
Now we have successfully deployed .NET Application on Kubernetes.
We can verify application deployment either by using Kubectl or Kubernetes Dashboard.
The below-mentioned command will show you running pods of your application with status running/terminated/stop/created.
Result of above command
Get the External Node Port using the below-mentioned command. External Node Port are in the range from 30000 to 65000.
Launch web Browser and open any of the below-mentioned URLs.
http://<kubernetes master ip address >: <application service port number>
http://<cluster ip address >: <application port number>
Notes – For above specific .NET Application, you will get the Pods Output.
Check Status of Pods.
Check Logs of Pods/Containers.
Check Service Port Status.
Check requirements/dependencies of application.
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