Azure CI pipeline for Blazor .NET 5 doesn't work

Question

I have an existing Azure CI pipeline for a WebAssembly Blazor application, that works with .NET Core 3.1.

I upgraded the application to use .NET 5 RC, and the pipelin

Answer 1

I set up a simple app service on my azure account, and trying to deploy to it. I can do it with the 'Publish' functionality from inside Visual Studio, but I cannot do the same inside the pipeline. The Publish does everything, starting from building the solution. I know I have the zip files on the pipeline, but when I try for example

- task: AzureWebApp@1
  inputs:
    azureSubscription: '<details>'
    appType: 'webApp'
    appName: '<name>'
    package: '$(System.DefaultWorkingDirectory)/**/*.zip'
    deploymentMethod: 'auto'

I get this error:

Got service connection details for Azure App Service:'DevOpsBlazorticketsWebApp'
Trying to update App Service Application settings. Data: {"WEBSITE_RUN_FROM_PACKAGE":"1"}
Deleting App Service Application settings. Data: ["WEBSITE_RUN_FROM_ZIP"]
App Service Application settings are already present.
Package deployment using ZIP Deploy initiated.
##[error]Failed to deploy web package to App Service.
##[error]To debug further please check Kudu stack trace URL : https://<details>
##[error]Error: Error: Failed to deploy web package to App Service. Internal Server Error (CODE: 500)
App Service Application URL: http://<details>
Finishing: AzureWebApp

I tried every other possibility, but I couldn't find a way...

Answer 2

Change your UseDotNet task to the following in order to make sure that the Visual Studio 2019 preview is used in conjunction with .NET5 preview:

- task: UseDotNet@2
  displayName: 'Use .NET 5 SDK (preview)'
  inputs:
    packageType: 'sdk'
    version: '5.0.100-rc.1.20452.10'
    vsVersion: '16.8.0'
    includePreviewVersions: true

Full YAML pipeline for your reference (this is working for my Blazor WASM .Net 5 project):

pool:
  vmImage: 'ubuntu-latest'

steps:

- task: UseDotNet@2
  displayName: 'Use .NET 5 SDK (preview)'
  inputs:
    packageType: 'sdk'
    version: '5.0.100-rc.1.20452.10'
    vsVersion: '16.8.0'
    includePreviewVersions: true

- task: DotNetCoreCLI@2
  displayName: 'NuGet restore'
  inputs:
    command: 'restore'
    projects: 'MyProject/MyProject.csproj'
    verbosityRestore: 'Normal'

- task: DotNetCoreCLI@2
  displayName: 'Build'
  inputs:
    zipAfterPublish: true
    command: publish
    publishWebProjects: false
    projects: 'MyProject/MyProject.csproj'
    arguments: '-c $(Build.Configuration) -o $(Build.ArtifactStagingDirectory) --no-restore'

- task: PublishBuildArtifacts@1
  displayName: 'Publish'
  inputs:
    PathtoPublish: '$(Build.ArtifactStagingDirectory)'
    ArtifactName: 'drop'
    publishLocation: 'Container'