Azure DevOps Pipeline in practice

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Azure DevOps Pipeline in practice

2024-04-04 Paweł Majewski 0 Comments

What is Pipeline?

Pipeline is a solution that automatically build, test and deploy an application. We can split Pipeline to (CI) and (CD) Pipelines.

CI – Continous Integration

CD – Continous Delivery/Deployment

CI – helps maintain code quality by catching errors early in the development process.

CD – streamlines the process of delivering code changes to production environments efficiently and reliably.

Use it in practice!

Today, I’ll show you how to use Azure DevOps Pipeline to deploy your application.

To follow this tutorial, go to Azure DevOps and create a new project.

I created a new organization named “pawelmajewskiblog” and a project named “Pipeline example“.

Now, let’s create a sample WebAPI application that we want to deploy using Azure Pipelines.

[WebApiProject - Minimal API] Program.cs

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
app.UseSwagger();
app.UseSwaggerUI();
app.UseHttpsRedirection();

var startDate = DateTime.Now;
var pipelineVariable = Environment.GetEnvironmentVariable("pipeline_variable");

app.MapGet("/", () =>
{
    return new { startDate, pipelineVariable };
})
.WithName("GetVersion")
.WithOpenApi();

app.Run();

This application contains one endpoint named GetVersion, which returns the start date of the application (startData) and the pipeline variable (pipelineVariable) that we will set in the pipeline.

Localhost response is presented below.

Push code to the repository

You can add .gitignore file https://raw.githubusercontent.com/github/gitignore/main/VisualStudio.gitignore.

When our repository is ready, we can go to the next step.

Create first pipeline

Go to the

And click “Create Pipeline”.

Select your repository, I’ll choose “Azure Repos Git”

Use the script for pipeline presented below

trigger:
- master

pool:
  vmImage: 'ubuntu-latest'

variables:
  buildConfiguration: 'Release'

steps:
- task: UseDotNet@2
  displayName: 'Install .NET Core SDK'
  inputs:
    version: 8.x
    
- task: DotNetCoreCLI@2
  inputs:
    command: 'restore'
    projects: '**/*.csproj'
  displayName: 'dotnet restore $(buildConfiguration)'

- task: DotNetCoreCLI@2
  inputs:
    command: 'build'
    projects: '**/*.csproj'
    arguments: '--configuration $(buildConfiguration)'
  displayName: 'dotnet build $(buildConfiguration)'

When you save this pipeline configuration file, then pipeline runs automatically for the first time.