I have a nodeJS API which uses child_process to run a python file.
I know heroku has a way to add another buildpack with a script.
Is there a way with Microsoft Azure (web app / app services) to use NodeAPI and Python files in an App service.
PS : Python file is not an API, it is just a script that runs from node.
Thank you
When you hosted a Web App in Azure, you already have all runtime environments by default.
Web App Runtime on Azure Portal:
Python Runtime on Kudu Explorer:
NodeJS and PHP on Kudu Explorer:
Check the other stack versions in Console and if it not sufficient, update them.
Note:
When creating the webapp, it is recommended to choose windows platform which supports virtual application because when you find that you cannot use the runtime you required, you can try to install runtime extensions for other programs.
Also, it is possible under Linux but requires command line to operate.
Related
I adapted the quick start code Python version here for Azure text to speech.
The app runs correctly on my local server. However, when I deploy the app through Visual Studio Code to Azure App Services, I got the error: 0x38 (SPXERR_AUDIO_SYS_LIBRARY_NOT_FOUND).
I found that this error is the same as the posts here and here. The reason seems to be that the Python interpreter used was from Microsoft Store instead of from Python.org. The solution, therefore, seems to be switching from the Microsoft Store version of Python to the Python.org version of python.
However, the solution above seems only work for those apps that run on a local or remote server. Since I am deploying my app to Azure App Services, and the deployment builds everything remote using oryx, I don't know how to switch from Microsoft Store version Python to the Python.org version python remotely.
I tried to change the Azure App Services Python version using Powershell, following the instruction from this post, but I was only able to change it from the current version of Python 3.9 to Python 3.8. When trying to change to version 3.10, I got an error message saying Python 3.10 is not supported.
After changing to Python 3.8, a new error was given:
ModuleNotFoundError at /
No module named '_speech_py_impl'
Thanks to #RajkumarMamidiChettu-MT for the instruction in the answer below. I think the solution is at the right direction. However, I got stuck at Step 3: My Azure app resource group is Linux (this seems to be default for Python apps and I can't change it). Therefore my kudu site does not have the UI of Debug Console and I cannot drag and drop my local Python package to the server. I do see that I have SSH and BASH interface. However, I don't know how and where to upload the package with either SSH or Bash.
Hopefully, someone can point me to the right direction. I feel I am getting so close.
For what it's worth, I found the Azure Text to Speech Error: 0x38 (SPXERR_AUDIO_SYS_LIBRARY_NOT_FOUND) error in my situation is because the deployment process was looking for the Linux version of Azure-Congnitiveservices-speech library, which ends with .so. However, for whatever reason, those .so library files were not generated when deploying my app to the Azure Linux environment. And the method mentioned in another post Azure Speech to text 0x38 (SPXERR_AUDIO_SYS_LIBRARY_NOT_FOUND) of manually pasting .dll (library files in windows) files to the execution path didn't work, because the web app environment is Linux, which is the default environment by Azure App Services for the Python web app. And there is no way to change the web app environment from Linux to Windows if using Azure's preconfigured web app environment to deploy a python app.
I was not able to figure out how to generate .so files for the Azure-Congnitiveservices-Speech pack with the default Linux environment. So I end up creating a custom Docker Windows Server container with Python 3.10, WindowsServer2019 (python:3.10.4-windowsservercore-1809 2022 is not supported at the time of this post), and then deploying it to Azure App Services with the customer docker container. It is working now.
From within VSCode, using the Azure web service extension, I can deploy a Hello-World flask app successfully to my Azure web app (linux, python 3.6 stack).
When I try to deploy my real flask app (with dependencies listed in a requirements.txt) file, and I specify "pip install --upgrade -r requirements.txt" as the web app "startup command" in the Azure portal, browsing the web app page gives an "Application Error".
The log for my web app shows the startup code failing when trying to build "psutil" due to the error unable to execute 'gcc': No such file or directory.
When the above failed, I also tried using "wheels" as part of my deployment as described here (https://blogs.msdn.microsoft.com/azureossds/2015/06/29/install-native-python-modules-on-azure-web-apps-api-apps/), but that didn't seem to change anything (same 'missing gcc' error).
Is this the correct way to deploy a flask app with python library dependencies from VSCode? I would expect that the deployment process would automatically process the requirements.txt (without having to specify the startup command) and I would expect it to be able to install the python libraries without error.
Due to you were using Azure WebApp for Linux based on Docker Container, the MSDN blog Install Python Modules on Azure App Services for Azure WebApp for Windows is not useful for your issue.
So for your issue of missing gcc error, per my experience, the solution to fix it is to configure a custom Linux container which had been pre-installed the gcc tool-chains and then to deploy your app into it from VS Code.
As references, please try to follow the documents below.
Configure a custom Linux container for Azure App Service . To install the gcc toolchains in a custom docker image via change the Docker file like install openssh as the section Enable SSH said.
Deploy to Azure using Docker from VS Code with Azure App Service extension.
I have an existing .NET Core / asp.net app service hosted on Azure. I need to call (on demand) a python script to return data based on custom user input.
It does not appear that I can use IronPython, since I need python modules that are built in CPython, which unfortunately aren't supported by IronPython.
The two options I see are:
I might be able to install the right python version and libraries on the app service and call it from the .NET code. This seems like it might be deprecated: https://learn.microsoft.com/en-us/visualstudio/python/publishing-python-web-applications-to-azure-from-visual-studio?view=vs-2017
I can create a whole new and separate app service for just the python script and call it as a REST API on demand from the .NET app service. This seems like overkill, and introduces the problem of opening up a whole new service publicly, which I don't want to do. This also appears to have the limitation that Flask isn't mean for production, so hosting many calls at once is not really workable. https://learn.microsoft.com/en-us/visualstudio/python/publish-to-app-service-windows?view=vs-2017
What is the best way to call a python script on demand from .NET app service on Azure?
Per my experience, there are two ways to call a Python script in C# without IronPython.
Directly use System.Diagnostics.Process in C# to run a command as same as the SO thread Run Command Prompt Commands to get the result via parse the content of the process standard output. Simply to do it, you can use py2exe to wrap a Python script as a .exe file to avoid for installing Python modules and setting environment variables on Azure App Service. However, considering for concurrency, it's not a good idea for performance.
The second option as you said is to deploy a Python script as a REST API in the same instance of Azure Web App. You can follow the blog Deploying multiple virtual directories to a single Azure Website to deploy a flask app with your Python script as a child project via Visual Studio with PTVS to expose an API url like https://<your web app name>.azurewebsites.net/pyapi which can be called from your ASP.NET via HttpClient. I tried this solution, it works.
Note: Due to the restriction of Azure Web App sandbox for Local Address Requests, you have to use <your web app name>.azurewebsites.net as hostname, neither localhost or 127.0.0.1.
I'm using Azure Python SDK to deploy a Linux Vm in the Cloud. This Vm has a public IP and ssh enabled. I need to have this Vm running a custom script immediately after it boots . This script would install pip, python, docker etc and start a docker container.
How could I pass this script when deploying the vm ? / How could I instruct the vm to run this script after it has started ?
Cheers,
Steve
According to your scenario, you could use Azure Custom Script Extension.
The Custom Script Extension downloads and executes scripts on Azure
virtual machines. This extension is useful for post deployment
configuration, software installation, or any other configuration /
management task. Scripts can be downloaded from Azure storage or other
accessible internet location, or provided to the extension run time.
If you want to use python to do this, please refer to this python sdk documentation.
Please refer to the similar question.
Hello i am an absolute beginner on cloud computing and on python. I would like to start develope a password manager app to Azure using Python. Please can you advice me some tools to start with my project? (which Apps - frameworks to use)
Python apps, in general, run in Windows Azure as they would run anywhere else, as they'd be running in Web or Worker roles (which are basically Windows Server 2008 R2 or SP2 VMs) or Virtual Machines (which are Windows Server or Linux images you manage). You just need to provide the python sdk and supporting libraries for your app.
Having said that: Windows Azure has a python sdk to interact with Windows Azure's services (today this covers Service Bus and Storage, a subset of Windows Azure services). When installing the Windows Azure sdk, you'll also get python 2.7 installed. You can get the installer in the python Develop portal for python, here. In this portal, you'll also find a few tutorials for working with python in Windows Azure.
If you want to see the source of the Windows Azure SDK for Python, it's available on github, here.