Azure Containers and Kubernetes

Course: Microsoft Azure: From Zero to Hero - The Complete Guide | Udemy Business

 

Video= 82 = Working with Containers

download azure cli

command => 

az

open cart app - vs code

add docker extension by microsoft

opern dockerfile

azure portal

open Container registries

create =>  give name and SKU = basic

click access keys=> Enable admin user for VS code

vs code => docker extension=> click on

azure => azure subscription 1=> name of container registrey => 

reight clikc to dockerfile => click buid Image in azure  =>name = latest => OS Linux

if any error => open terminal => az login

go to portal => open container registri => Repository => you can see cart/'latest' 

==========================================================

Video => 83=>working with azure Kubernetes => AKS

open azure portal => search => Kubernetes services

create => Kubernetes cluster

cluster preset config= dev/test

name = cart-aks , tier =free

intergation tab- container registry- select name - review create = done

open cart porject in vs- terminal

dowmload aks cli  => az aks install cli

restart vs code

run command => az login

run command =>

az aks get-credentials --resource-group readit-app-rg --name cart-aks

run command =>

kubectl get nodes

this will show running nodes

deployment.yaml file => use to kubernatics to deploy cluster

change image section =>name with registry name

run command = to create sevice

kubctl apply -f deployment.yaml

go to portal

search kubernetes service => open created cart-aks

=> services and ingresses

=> list=> readit-cart = with type = load balancer

click on readit-cart

ports and pods

click on pods

click on external IP => which is deployed URL

Deploying a .NET Core application using Docker

 Deploying a .NET Core application using Docker involves creating a Docker image of your application and then running containers based on that image. Below is a step-by-step guide to deploying a simple .NET Core application using Docker.

Step 1: Create a .NET Core Application

If you don't have a .NET Core application yet, you can create a simple one. Open a terminal or command prompt and run the following commands:

bash
dotnet new console -n MyDotNetApp
cd MyDotNetApp

Edit the Program.cs file to print a message, for example:

csharp
using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, Docker and .NET Core!");
    }
}

Step 2: Create a Dockerfile

Create a file named Dockerfile in the project directory with the following content:

dockerfile
# Use the official .NET Core SDK image
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build

# Set the working directory in the container
WORKDIR /app

# Copy the application files to the container
COPY . .

# Build the application
RUN dotnet publish -c Release -o out

# Use a smaller runtime image for the final image
FROM mcr.microsoft.com/dotnet/core/runtime:3.1

# Set the working directory in the container
WORKDIR /app

# Copy the published files from the build image
COPY --from=build /app/out .

# Run the application
ENTRYPOINT ["dotnet", "MyDotNetApp.dll"]

This Dockerfile does the following:

• Uses the official .NET Core SDK image to build the application.
• Copies the application files, builds the application, and publishes it.
• Uses a smaller runtime image to reduce the final image size.
• Sets the entry point to run the compiled application.

Step 3: Build the Docker Image

Open a terminal in the project directory and run the following commands:

bash
docker build -t mydotnetapp .

This command builds a Docker image with the tag mydotnetapp.

Step 4: Run the Docker Container

Now that you have built the Docker image, you can run a container based on that image:

bash
docker run mydotnetapp

This command starts a container from the mydotnetapp image, and you should see the "Hello, Docker and .NET Core!" message.

Additional Tips:

• If you need to expose a specific port in your application, you can use the -p option when running the container. For example, to expose port 80:

  bash
  docker run -p 80:80 mydotnetapp
  

• Explore Docker Compose for more complex scenarios involving multiple services.

Remember to adjust version numbers in the Dockerfile according to your application's .NET Core version. Also, consider security best practices, such as using environment variables for sensitive information.

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