Task 7: Create a Pipeline to Deploy a Docker Image in a New Branch

Step 1: Create a New Branch

In your Azure DevOps Project (Project1), navigate to Repos .

In the left menu, click on Branches .

Click New branch .

Enter:

Branch name: azure-pipelines

Based on: main (or your default branch)

Click Create .

This creates a new branch named azure-pipelines.

Step 2: Switch to the New Branch

In Repos , click on Files .

In the top-left branch selector, choose azure-pipelines .

Step 3: Use the Predefined Docker Pipeline Template

Azure Pipelines has predefined YAML templates for common tasks, including Docker.

Here’s how to add it:

In the azure-pipelines branch, click New file .

Name the file: azure-pipelines.yml.

Click the Show templates button in the YAML editor (if available).

Search for the Docker template in the list of predefined templates.

Select the Docker template to auto-populate the YAML file.

If the editor doesn’t show the template picker, you can manually add the following basic Docker pipeline template:

yaml

Copy

# Predefined Docker pipeline template

trigger:

- main

resources:

- repo: self

variables:

imageName: ' mydockerimage '

stages:

- stage: Build

displayName: Build and push stage

jobs:

- job: Build

pool:

vmImage: ' ubuntu-latest '

steps:

- task: Docker@2

displayName: Build and push an image to container registry

inputs:

command: buildAndPush

repository: $(imageName)

dockerfile: ' **/Dockerfile '

containerRegistry: ' < your-container-registry-service-connection > '

tags: |

latest

Replace < your-container-registry-service-connection > with your actual Azure Container Registry (ACR) or DockerHub service connection name.

Step 4: Commit the Pipeline to the New Branch

In the YAML editor, review and adjust if needed (like setting the correct container registry service connection).

In the bottom commit message box:

Message: e.g., Add Docker deployment pipeline

Ensure the branch is set to azure-pipelines .

Click Commit (not commit to main).

This creates the pipeline YAML file in the new azure-pipelines branch.

Step 5: Create the Pipeline in Azure DevOps

In the left menu, click Pipelines .

Click New pipeline .

Choose:

Azure Repos Git .

Select your repo.

Select Existing Azure Pipelines YAML file .

In the branch selector, choose the azure-pipelines branch.

Select the YAML file path (azure-pipelines.yml).

Click Continue and then Run to validate the pipeline.