Flask App deployment using Azure Web App from Github

Question

Flask App deployment using Azure Web App from Github

Vijayakumar Elumalai 105

i am trying to deploy the flask app into azure using Web App from Github. Deployment is done but getting application error after clicking default domain url. azure

Flask app is working fine in local machine. Is there any specific way to start the flask app in azure ? In local i am starting it like app.run() and working fine. Please guide me on this.

Workflow:

name: Build and deploy Python app to Azure Web App - HiringPredictions

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python version
        uses: actions/setup-python@v1
        with:
          python-version: '3.10'

      - name: Create and start virtual environment
        run: |
          python -m venv venv
          source venv/bin/activate
      
      - name: Install dependencies
        run: pip install -r requirements.txt

      # Optional: Add step to run tests here (PyTest, Django test suites, etc.)

      - name: Upload artifact for deployment jobs
        uses: actions/upload-artifact@v2
        with:
          name: python-app
          path: |
            . 
            !venv/
  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v2
        with:
          name: python-app
          path: .

      - name: 'Deploy to Azure Web App'
        uses: azure/webapps-deploy@v2
        id: deploy-to-webapp
        with:
          app-name: 'HiringPredictions'
          slot-name: 'Production'
          publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }}

Lex Li (Microsoft) 6,037 Reputation points Microsoft Employee

2023-08-23T15:03:36.2666667+00:00

You will have to show your GitHub Actions manifest file that contains the workflow.

Vijayakumar Elumalai 105

Please find the below,

# Docs for the Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy
# More GitHub Actions for Azure: https://github.com/Azure/actions
# More info on Python, GitHub Actions, and Azure App Service: https://aka.ms/python-webapps-actions

name: Build and deploy Python app to Azure Web App - HiringPredictions

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python version
        uses: actions/setup-python@v1
        with:
          python-version: '3.10'

      - name: Create and start virtual environment
        run: |
          python -m venv venv
          source venv/bin/activate
      
      - name: Install dependencies
        run: pip install -r requirements.txt

      # Optional: Add step to run tests here (PyTest, Django test suites, etc.)

      - name: Upload artifact for deployment jobs
        uses: actions/upload-artifact@v2
        with:
          name: python-app
          path: |
            . 
            !venv/
  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v2
        with:
          name: python-app
          path: .

      - name: 'Deploy to Azure Web App'
        uses: azure/webapps-deploy@v2
        id: deploy-to-webapp
        with:
          app-name: 'HiringPredictions'
          slot-name: 'Production'
          publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }}

Vijayakumar Elumalai 105

# Docs for the Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy
# More GitHub Actions for Azure: https://github.com/Azure/actions
# More info on Python, GitHub Actions, and Azure App Service: https://aka.ms/python-webapps-actions

name: Build and deploy Python app to Azure Web App - HiringPredictions

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python version
        uses: actions/setup-python@v1
        with:
          python-version: '3.10'

      - name: Create and start virtual environment
        run: |
          python -m venv venv
          source venv/bin/activate
      
      - name: Install dependencies
        run: pip install -r requirements.txt

      # Optional: Add step to run tests here (PyTest, Django test suites, etc.)

      - name: Upload artifact for deployment jobs
        uses: actions/upload-artifact@v2
        with:
          name: python-app
          path: |
            . 
            !venv/
  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}

    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v2
        with:
          name: python-app
          path: .

      - name: 'Deploy to Azure Web App'
        uses: azure/webapps-deploy@v2
        id: deploy-to-webapp
        with:
          app-name: 'HiringPredictions'
          slot-name: 'Production'
          publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }}

1 answer

Your answer

Lex Li (Microsoft) 6,037 Reputation points Microsoft Employee

2023-08-23T15:03:36.2666667+00:00

You will have to show your GitHub Actions manifest file that contains the workflow.
Vijayakumar Elumalai 105 Reputation points

2023-08-23T15:07:28+00:00

Please find the below,

# Docs for the Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy # More GitHub Actions for Azure: https://github.com/Azure/actions # More info on Python, GitHub Actions, and Azure App Service: https://aka.ms/python-webapps-actions name: Build and deploy Python app to Azure Web App - HiringPredictions on: push: branches: - main workflow_dispatch: jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - name: Set up Python version uses: actions/setup-python@v1 with: python-version: '3.10' - name: Create and start virtual environment run: | python -m venv venv source venv/bin/activate - name: Install dependencies run: pip install -r requirements.txt # Optional: Add step to run tests here (PyTest, Django test suites, etc.) - name: Upload artifact for deployment jobs uses: actions/upload-artifact@v2 with: name: python-app path: | . !venv/ deploy: runs-on: ubuntu-latest needs: build environment: name: 'Production' url: ${{ steps.deploy-to-webapp.outputs.webapp-url }} steps: - name: Download artifact from build job uses: actions/download-artifact@v2 with: name: python-app path: . - name: 'Deploy to Azure Web App' uses: azure/webapps-deploy@v2 id: deploy-to-webapp with: app-name: 'HiringPredictions' slot-name: 'Production' publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }}
Vijayakumar Elumalai 105 Reputation points

2023-08-23T15:08:28.9533333+00:00

# Docs for the Azure Web Apps Deploy action: https://github.com/Azure/webapps-deploy # More GitHub Actions for Azure: https://github.com/Azure/actions # More info on Python, GitHub Actions, and Azure App Service: https://aka.ms/python-webapps-actions name: Build and deploy Python app to Azure Web App - HiringPredictions on: push: branches: - main workflow_dispatch: jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - name: Set up Python version uses: actions/setup-python@v1 with: python-version: '3.10' - name: Create and start virtual environment run: | python -m venv venv source venv/bin/activate - name: Install dependencies run: pip install -r requirements.txt # Optional: Add step to run tests here (PyTest, Django test suites, etc.) - name: Upload artifact for deployment jobs uses: actions/upload-artifact@v2 with: name: python-app path: | . !venv/ deploy: runs-on: ubuntu-latest needs: build environment: name: 'Production' url: ${{ steps.deploy-to-webapp.outputs.webapp-url }} steps: - name: Download artifact from build job uses: actions/download-artifact@v2 with: name: python-app path: . - name: 'Deploy to Azure Web App' uses: azure/webapps-deploy@v2 id: deploy-to-webapp with: app-name: 'HiringPredictions' slot-name: 'Production' publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }}

Answer 1

brtrach-MSFT 17,731 Microsoft Employee Moderator

@Anonymous It seems like you have successfully deployed your Flask app to Azure Web App, but you are getting an application error after clicking the default domain URL. There could be several reasons for this error, such as incorrect configuration settings or missing dependencies.

To start the Flask app in Azure, you need to specify the entry point of your application in the web.config file. You can add the following code to the web.config file to start your Flask app:

<configuration>
  <appSettings>
    <add key="WSGI_HANDLER" value="app.app" />
    <add key="PYTHONPATH" value="D:\home\site\wwwroot" />
  </appSettings>
  <system.webServer>
    <handlers>
      <add name="Python FastCGI" path="handler.fcgi" verb="*" modules="FastCgiModule" scriptProcessor="D:\home\Python37\python.exe|D:\home\Python37\wfastcgi.py" resourceType="Unspecified" requireAccess="Script" />
    </handlers>
  </system.webServer>
</configuration>

Make sure to replace app.app with the name of your Flask app's entry point.

Additionally, you can check the logs to see if there are any errors that could be causing the application error. You can access the logs by running the az webapp log tail command in the Azure CLI.

If you are still having issues, you can try redeploying your app.

Vijayakumar Elumalai 105 Reputation points

2023-08-25T05:53:51.4733333+00:00

Thank you for the information... where to find the web.config file ? i am not using it in my flask app. how to derive this web.config file? because i am using linux in azure so path's are different.. Can you give the step by step process so that i can follow that to implement..
Vijayakumar Elumalai 105 Reputation points

2023-08-25T06:09:18.2066667+00:00

Also, is there anyway to do the configuration setting in azure portal like startup command..ect ? Will this initiate the flask app run after clicking the domain url generated in azure portal ?

Vijayakumar Elumalai 105

i have created a xml file and placed it in my root folder. Note: i have updated my flask app script name as app so i just copy pasted your code. User's image

Then pushed the update through local git and hit the url but getting same application error message. ple find the below log ref,

2023-08-25T08:05:27.851976410Z Launching oryx with: create-script -appPath /home/site/wwwroot -output /opt/startup/startup.sh -virtualEnvName antenv -defaultApp /opt/defaultsite -userStartupCommand 

2023-08-25T08:05:27.851984010Z 

2023-08-25T08:05:27.851988311Z 

2023-08-25T08:05:28.171528858Z flag needs an argument: -userStartupCommand

2023-08-25T08:05:28.171572860Z Usage of create-script:

2023-08-25T08:05:28.171578061Z   -appPath string

2023-08-25T08:05:28.171582461Z     	The path to the application folder, e.g. '/home/site/wwwroot/'. (default ".")

2023-08-25T08:05:28.171587461Z   -bindPort string

2023-08-25T08:05:28.171591662Z     	[Optional] Port where the application will bind to. Default is 80

2023-08-25T08:05:28.171596162Z   -debugAdapter string

2023-08-25T08:05:28.171600262Z     	Python debugger adapter. Currently, only 'debugpy' is supported.

2023-08-25T08:05:28.171604462Z   -debugPort string

2023-08-25T08:05:28.171608563Z     	Port where the debugger will bind to. Has no effect if -debugAdapter isn't used. (default "5678")

2023-08-25T08:05:28.171612863Z   -debugWait

2023-08-25T08:05:28.171616863Z     	Whether the debugger adapter should pause and wait for a client connection before running the app.

2023-08-25T08:05:28.171621063Z   -defaultApp string

2023-08-25T08:05:28.171625064Z     	[Optional] Path to a default file that will be executed if the entrypoint is not found. Ex: '/opt/defaultsite'

2023-08-25T08:05:28.171629364Z   -defaultAppDebugModule string

2023-08-25T08:05:28.171647665Z     	Module to run if running the app in debug mode, e.g. 'application.py start_dev_server'. Has no effect if -debugAdapter isn't used. (default "application.py")

2023-08-25T08:05:28.171652465Z   -defaultAppModule string

2023-08-25T08:05:28.171656565Z     	Module of the default application, e.g. 'application:app'. (default "application:app")

2023-08-25T08:05:28.171660866Z   -manifestDir string

2023-08-25T08:05:28.171664966Z     	[Optional] Path to the directory where build manifest file can be found. If no value is provided, then it is assumed to be under the directory specified by 'appPath'.

2023-08-25T08:05:28.171669466Z   -output string

2023-08-25T08:05:28.171673466Z     	Path to the script to be generated. (default "run.sh")

2023-08-25T08:05:28.171677767Z   -packagedir string

2023-08-25T08:05:28.171681767Z     	Directory where the python packages were installed, if no virtual environment was used.

2023-08-25T08:05:28.171685967Z   -skipVirtualEnvExtraction

2023-08-25T08:05:28.171690067Z     	Disables the extraction of the compressed virtual environment file. If used, some external tool will have to extract it - otherwise the application might not work.

2023-08-25T08:05:28.171694368Z   -userStartupCommand string

2023-08-25T08:05:28.171698368Z     	[Optional] Command that will be executed to start the application up.

2023-08-25T08:05:28.171702568Z   -virtualEnvName string

2023-08-25T08:05:28.171706468Z     	Name of the virtual environment for the app

2023-08-25T08:05:28.171710669Z chmod: cannot access '/opt/startup/startup.sh': No such file or directory

2023-08-25T08:05:28.171714769Z /opt/startup/init_container.sh: line 72: /opt/startup/startup.sh: No such file or directory



2023-08-25T08:05:44.632Z ERROR - Container score-123_0_dc5537f7 for site score-123 has exited, failing site start

2023-08-25T08:05:45.350Z ERROR - Container score-123_0_dc5537f7 didn't respond to HTTP pings on port: 8000, failing site start. See container logs for debugging.

2023-08-25T08:05:45.465Z INFO  - Stopping site score-123 because it failed during startup.

brtrach-MSFT 17,731 Reputation points Microsoft Employee Moderator

2023-09-01T01:51:43.04+00:00
@Anonymous It seems like there is an issue with the startup command in your workflow. The error message indicates that the flag -userStartupCommand needs an argument, but it is not provided. You can try adding the startup command to the Deploy to Azure Web App step in your workflow. Here is an example:

- name: 'Deploy to Azure Web App' uses: azure/webapps-deploy@v2 id: deploy-to-webapp with: app-name: 'HiringPredictions' slot-name: 'Production' publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_D60DA2200CCD42C5A0F3BB09AF5DC6B9 }} startup-command: 'gunicorn app:app'

Make sure to replace gunicorn app:app with the startup command for your Flask app.

As mentioned in the last message, the logs indicate that the container for your site has exited and failed to respond to HTTP pings on port 8000. This could be due to a misconfiguration or missing dependencies. You can try checking the logs for your Flask app to see if there are any errors that could be causing the issue. You can access the logs by running the az webapp log tail command in the Azure CLI. Getting the error could help us understand what is going on if the above step of adding a -userstartupCommand does not work.

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Flask App deployment using Azure Web App from Github

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