Azure DevOps yaml pipeline cheatsheet

A couple remarks

Use a single pipeline for CI-CD, as there seems to be no way to connect BuildId (i.e., container version/tag to deploy) from CI pipeline to CD pipeline.
The environment referenced in the deployment jobs are created if doesn’t exist
The environment is where the approvals are configured, directly in Azure DevOps
The pipeline is linked to a git repo in Azure DevOps as well.
The pipeline is triggered when the master branch is pushed.
The pipeline does:
- build and push container image to ACR
- deploy to dev environment
- deploy to int environment
The Service Connection (in this case AzDevOps.ServiceConnection), needs to be created.

Sample two-environments pipeline

The example is for a netcore app running in a container.

# Docker
# Build and push an image to Azure Container Registry
# https://docs.microsoft.com/azure/devops/pipelines/languages/docker

trigger:
- master

resources:
- repo: self

variables:
  # Container registry service connection established during pipeline creation
  dockerRegistryServiceConnection: 'ra076bb1-83c4-4bff-9c7d-d2e1b7918498'
  imageRepository: 'bustroker.yamlpipelines.webapi'
  containerRegistry: 'bustrokeryamlpipelines.azurecr.io'
  dockerfilePath: '$(Build.SourcesDirectory)/Bustroker.YamlPipelines.WebApi/Dockerfile'
  tag: '$(Build.BuildId)'
  
  # Agent VM image name
  vmImageName: 'ubuntu-latest'

stages:
- stage: BuildStage
  displayName: Build
  jobs:  
  - job: Build
    displayName: Build and push
    pool:
      vmImage: $(vmImageName)
    steps:
    - task: Docker@2
      displayName: Build and push an image to container registry
      inputs:
        command: buildAndPush
        repository: $(imageRepository)
        dockerfile: $(dockerfilePath)
        containerRegistry: $(dockerRegistryServiceConnection)
        tags: |
          $(tag)          

- stage: DevDeployStage
  dependsOn: BuildStage
  displayName: Dev
  jobs:
  - deployment: DevDeploymentJob
    displayName: Deploy to dev
    environment: dev
    strategy: 
      runOnce:
        deploy:
          steps:
          - task: AzureWebAppContainer@1
            inputs:
              azureSubscription: 'AzDevOps.ServiceConnection'
              appName: 'bustroker-yamlpipelines-webapi-dev'
              containers: '$(containerRegistry)/$(imageRepository):$(tag)'
              appSettings: '-ASPNETCORE_ENVIRONMENT dev'
              
- stage: IntDeployStage
  dependsOn: DevDeployStage
  displayName: Int
  jobs:
  - deployment: IntDeploymentJob
    displayName: Deploy to int
    environment: int
    pool:
      vmImage: $(vmImageName)
    strategy: 
      runOnce:
        deploy:
            - task: AzureWebAppContainer@1
              inputs:
                azureSubscription: 'AzDevOps.ServiceConnection'
                appName: 'bustroker-yamlpipelines-webapi-int'
                containers: '$(containerRegistry)/$(imageRepository):$(tag)'
                appSettings: '-ASPNETCORE_ENVIRONMENT int'