Deployment Failed, Error: No credentials found

[rufer7]

For some not yet identified reason, the azure/webapps-deploy@v3 (I also tried azure/webapps-deploy@v3.0.2) fails with the following error:

Error: Deployment Failed, Error: No credentials found. Add an Azure login action before this action. For more details refer https://github.com/azure/login

My GitHub actions workflow job looks as follows:

  deploy:
    name: Deploy to Azure Web App
    runs-on: ubuntu-latest
    environment: dev
    needs: [build_test_publish, iac_apply]
    steps:
      - name: Download artifact
        uses: actions/download-artifact@v4
      - uses: azure/login@v2
        with:
          client-id: ${{ secrets.AZURE_CLIENT_ID }}
          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
      - name: Deploy to Azure Web App
        uses: azure/webapps-deploy@v3.0.2
        with:
          app-name: my-app
          package: .
      - name: Logout
        run: |
          az logout

The steps Download artifact and azure/login@v2 both succeed. To set up the secrets, I followed the official docs here and the jobs before the one above succeed with the same secrets (iac_apply for example). I also enabled debug logging where I saw that az account show is executed and the next log entry was {} so I assume the account show command returns an empty object. But I have no idea why. Would be happy about any suggestions, hints or resolutions.

[borislavml]

We have the exact same setup and have the exact same problem. The az login work for Azure/functions-action but NOT for azure/webapps-deploy with a private endpoint. The workaround is to use azure/webapps-deploy@v2.2.9 . Why this has been neglected for so long, the action is already on 3.0.2. Who's even using the versions above 2.2.9 if they are not working?

[rufer7]

@borislavml unfortunately v2.2.9 didn't work either (same error msg). As a workaround I used az cli: https://github.com/rufer7/dotnet-webapi-using-az-key-vault-secret-rotated-by-terraform/blob/main/.github/workflows/ci-cd.yml

[prathambande]

Hello @rufer7 . Are you by any chance using AZURE_CORE_OUTPUT: none in env of the workflow? If yes, then that is causing the issue. Do let us know.

[rufer7]

Hello @prathambande thanks for the hint. Yes, I do. I wasn't aware of this could cause the issue, but could make sense. I'll check in the next days. If this helps I can create a PR to extend the README with a troubleshooting section. Would that be appreciated?

[rufer7]

@prathambande works (see here)! Thx a lot!