Deploy code from Azure repo to Function app slot - azure

Question

I have setup Azure DevOps repo and pipeline to deploy my code to Azure Functio App slot. I was able to deploy app to my slot but after making some code changes I tried to re deploy my app/code but now pipeline failed. Probably because my pipeline is somehow wrong configured (so it can only deploy if slot is empty but can not update or redeploy on top of existing code).
This is my pipeline
- master
variables:
# Azure Resource Manager connection created during pipeline creation
azureSubscription: 'My Service Connector'
# Function app name
functionAppName: 'My Fuction app name'
# Agent VM image name
vmImageName: 'vs2017-win2016'
# Working Directory
workingDirectory: '$(System.DefaultWorkingDirectory)/'
stages:
- stage: Build
displayName: Build stage
jobs:
- job: Build
displayName: Build
pool:
vmImage: $(vmImageName)
steps:
- powershell: |
if (Test-Path "extensions.csproj") {
dotnet build extensions.csproj --output ./$(workingDirectory)/bin
}
displayName: 'Build extensions'
- task: ArchiveFiles#2
displayName: 'Archive files'
inputs:
rootFolderOrFile: $(workingDirectory)
includeRootFolder: false
archiveType: zip
archiveFile: $(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip
replaceExistingArchive: true
- publish: $(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip
artifact: drop
- stage: Deploy
displayName: Deploy stage
dependsOn: Build
condition: succeeded()
jobs:
- deployment: Deploy
displayName: Deploy
environment: $(functionAppName)
pool:
vmImage: $(vmImageName)
strategy:
runOnce:
deploy:
steps:
- task: AzureFunctionApp#1
inputs:
azureSubscription: '$(azureSubscription)'
appType: functionApp
appName: $(functionAppName)
package: '$(Pipeline.Workspace)/drop/$(Build.BuildId).zip'
deployToSlotOrASE: true
resourceGroupName: 'my app resource group'
slotName: testing
Error from pipeline:
FYi, I'm not developer nor that familiar with tools like git, repos, pipelines etc. Any tips what could I do different so that I could update my app code from Azure Repos + pipelines?

Answer 1

Try to set up a new ARM connection (Azure Resource Manager service connection) for use in the pipeline to see if it can work.
If the issue still exists, you can enable debugging via setting the pipeline variable System.Debug to true. The queue a new run. From the debug logs, you may get more helpful information about the issue.

Answer 2

Had to change vmImageName: 'vs2017-win2016' to vmImageName: 'windows-lastest' to get this working.