Deploying ASP.net Core 2.0 to Azure - asp.net

Question

I have upgraded an ASP.net Core 1.1 app to ASP.net Core 2.0 with the following steps:
Changed the Target Framework to 2.0
Upgraded all Nugget Packages
Now my auto deployment from git runs and says it is successful but the app does not run. I get the following error:
HTTP Error 502.5 - Process Failure
I also added a separate web app deployment slot and tried deploying it there and still get the same result. I have also tried deploying it manually to the slow and no change.

Answer 1

The accepted answer did not fix the problem for me.
Steps Required:
Launch Azure Console within the app and delete the contents of the wwwroot folder then redeploy.
RMDIR wwwroot /S /Q
Also, if you have installed the Application Insights Extension within your app. When the app starts you will receive an exception stating that it can't be found.
To fix this error reinstall the Application Insights Extension from the Extensions blade and restart the app.
The problem with the wwwroot folder is that the old Core 1.1 files are not overwritten. Removing the contents of the directory resolves the problem.

Answer 2

I had the same problem, which was caused by files leftover from a previous .NET Core 1.1 deployment. The easiest way to fix this is to check the "Remove additional files at destination" under the File Publish Options in your Publish Settings when publishing to Azure from VS.

Answer 3

I had to add the following to all the .csproj files in the solution
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />
</ItemGroup>

Answer 4

This problem also happens when using DevOps Pipeline for the code targeted to dotnet core 2.1. This is because as of today 10/2, Azure is using DotNetCore 3.0 as default runtime (at least that's what it looks to be). To resolve this problem in devops pipeline, you must install the SDK
Yaml Code:
steps:
- task: UseDotNet#2
displayName: 'Install Core 2.1'
inputs:
version: 2.2.104
PS: This tells me that you've to install SDK on destination machine too, for dotnet to compile in correct version. (Azure or Windows Server whichever is your destination)