How to build ARM64 docker images with Azure DevOps Pipelines?

Azure DevOps doesn’t directly support specifying the architecture in the pipeline YAML. However, you can still achieve ARM64 builds in Azure DevOps pipelines through QEMU emulator.

Example:
Build arm64 Image with the help of QEMU and Push to Docker Hub Registry.

trigger:
  branches:
    include:
      - main

pool:
  vmImage: 'ubuntu-latest'

variables:
- name: container_registry
  value: test
- name: repository
  value: test/test

steps:
  - task: CmdLine@2
    displayName: 'Install emulator'
    inputs:
      script: 'sudo apt-get install -y qemu qemu-user-static'

  - task: Docker@2
    displayName: 'Login'
    inputs:
      containerRegistry: $(container_registry)
      command: 'login'

  - task: Docker@2
    displayName: 'Build'
    inputs:
      containerRegistry: $(container_registry)
      repository: $(repository)
      command: 'build'
      arguments: '--platform linux/arm64'
      Dockerfile: 'Dockerfile'
      tags: 'latest'

  - task: Docker@2
    displayName: 'Push'
    inputs:
      containerRegistry: $(container_registry)
      repository: $(repository)
      command: 'push'
      tags: 'latest'