Azure App Service provides us with a fully-managed platform for us to run our web apps. We can deploy ASP.NET web apps quickly to Azure without any complicated configurations. However, if we are working with a Python web app with Flask and want to deploy the app to Azure, we have to do some configurations both on Azure Web Service and the Python app.
First, install Python extension for the App Service since the built-in Python environment cannot be modified, not even installing a third-party package from pip.
Go to Extensions - Add and install a Python environment.
Copy the install path after the installation.
Now that we finished the configuration, the next step is to configure your Python app. In order to run a Python web app in the production environment, we need to host your app on a WSGI server. In this passage, we are going to use Waitress as WSGI server.
Create a Python file named “run_waitress_server.py” and paste the code below to this file.
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import os from waitress import serve from your_app import app
Notice that “processPath” should point to your Python environment.
Finally, to make your app deploy smoothly, we can create a “requirements.txt” and a deploy script which can help us install the required packages automatically during the deployment process.
:: Verify node.js installed where node 2>nul >nul IF %ERRORLEVEL% NEQ 0 ( echo Missing node.js executable, please install node.js, if already installed make sure it can be reached from current environment. goto error )
:: Setup :: -----
setlocal enabledelayedexpansion
SET ARTIFACTS=%~dp0%..\artifacts
IF NOT DEFINED DEPLOYMENT_SOURCE ( SET DEPLOYMENT_SOURCE=%~dp0%. )
IF NOT DEFINED DEPLOYMENT_TARGET ( SET DEPLOYMENT_TARGET=%ARTIFACTS%\wwwroot )
IF NOT DEFINED NEXT_MANIFEST_PATH ( SET NEXT_MANIFEST_PATH=%ARTIFACTS%\manifest
IF NOT DEFINED PREVIOUS_MANIFEST_PATH ( SET PREVIOUS_MANIFEST_PATH=%ARTIFACTS%\manifest ) )
IF NOT DEFINED KUDU_SYNC_CMD ( :: Install kudu sync echo Installing Kudu Sync call npm install kudusync -g --silent IF !ERRORLEVEL! NEQ 0 goto error
:: Locally just running "kuduSync" would also work SET KUDU_SYNC_CMD=%appdata%\npm\kuduSync.cmd ) goto Deployment
:: Utility Functions :: -----------------
:SelectPythonVersion
IF DEFINED KUDU_SELECT_PYTHON_VERSION_CMD ( call %KUDU_SELECT_PYTHON_VERSION_CMD% "%DEPLOYMENT_SOURCE%""%DEPLOYMENT_TARGET%""%DEPLOYMENT_TEMP%" IF !ERRORLEVEL! NEQ 0 goto error
SET /P PYTHON_RUNTIME=<"%DEPLOYMENT_TEMP%\__PYTHON_RUNTIME.tmp" IF !ERRORLEVEL! NEQ 0 goto error
SET /P PYTHON_VER=<"%DEPLOYMENT_TEMP%\__PYTHON_VER.tmp" IF !ERRORLEVEL! NEQ 0 goto error
SET /P PYTHON_EXE=<"%DEPLOYMENT_TEMP%\__PYTHON_EXE.tmp" IF !ERRORLEVEL! NEQ 0 goto error
SET /P PYTHON_ENV_MODULE=<"%DEPLOYMENT_TEMP%\__PYTHON_ENV_MODULE.tmp" IF !ERRORLEVEL! NEQ 0 goto error ) ELSE ( SET PYTHON_RUNTIME=python-2.7 SET PYTHON_VER=2.7 SET PYTHON_EXE=%SYSTEMDRIVE%\python27\python.exe SET PYTHON_ENV_MODULE=virtualenv )
REM Add additional package installation here REM -- Example -- REM env\scripts\easy_install pytz REM IF !ERRORLEVEL! NEQ 0 goto error
:: 5. Copy web.config IF EXIST "%DEPLOYMENT_SOURCE%\web.%PYTHON_VER%.config" ( echo Overwriting web.config with web.%PYTHON_VER%.config copy /y "%DEPLOYMENT_SOURCE%\web.%PYTHON_VER%.config""%DEPLOYMENT_TARGET%\web.config" )
:: 6. Django collectstatic IF EXIST "%DEPLOYMENT_TARGET%\manage.py" ( IF EXIST "%DEPLOYMENT_TARGET%\env\lib\site-packages\django" ( IF NOT EXIST "%DEPLOYMENT_TARGET%\.skipDjango" ( echo Collecting Django static files. You can skip Django specific steps with a .skipDjango file. IF NOT EXIST "%DEPLOYMENT_TARGET%\static" ( MKDIR "%DEPLOYMENT_TARGET%\static" ) env\scripts\python manage.py collectstatic --noinput --clear ) ) )
popd
:postPython
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: goto end
:: Execute command routine that will echo out when error :ExecuteCmd setlocal set _CMD_=%* call %_CMD_% if"%ERRORLEVEL%" NEQ "0"echo Failed exitCode=%ERRORLEVEL%, command=%_CMD_% exit /b %ERRORLEVEL%
:error endlocal echo An error has occurred during web site deployment. call :exitSetErrorLevel call :exitFromFunction 2>nul
:exitSetErrorLevel exit /b 1
:exitFromFunction ()
:end endlocal echo Finished successfully.
With everything done, we should be able to deploy your app to Azure now. I used Git but other methods should work as well.