How to deploy python function on Azure Fuctions - Linux consumption plan

Question

How to deploy python function on Azure Fuctions - Linux consumption plan

Rkdm 0

Hello,

I am trying to deploy a Python function on Azure functions using zip package stored in an Azure storage blob.

WEBSITE_RUN_FROM_PACKAGE Is set to the url. It works, I am able to run a simple hello world function.

But when it comes to install additional Python library listed in requirements.txt - the libraries are not installed.

Can you please indicate what is the right procedure or zip file structure or any else required to make it work ?

the specific library I am trying to install is : azure-storage-blob

I already tried to install it manually in the zip with pip install -r requirements.txt — target at zip root but also at the folder .python_packages/lib/site-packages Without success.

Thank you for your support.

Rkdm

Sai Prabhu Naveen Parimi 2,265 Reputation points Microsoft External Staff Moderator

2025-04-17T05:16:17.98+00:00
@Rkdm

If you're deploying a Python Azure Function using a zip file stored in a Blob Storage container, and you're running into issues with libraries not getting picked up (like azure-storage-blob), here's what you need to make sure of:

1. Install your dependencies locally Before you zip up your function app, you need to install the Python libraries listed in your requirements.txt file into a folder inside your project. You can do this with:

pip install -r requirements.txt --target .python_packages/lib/site-packages

This puts all your dependencies where Azure Functions expects to find them.

2. Make sure the zip structure is right When you create the zip file, don’t zip the project folder itself—zip the contents of it. Your zip should look something like this:

myfunction.zip ├── HttpTrigger1/ │ ├── __init__.py │ └── function.json ├── host.json ├── requirements.txt └── .python_packages/ └── lib/ └── site-packages/ ├── azure_storage_blob/ └── other_dependencies/

Put simply: your .py files, host.json, and .python_packages should all be in the root of the zip.

3. Set WEBSITE_RUN_FROM_PACKAGE In your Function App settings (under Configuration), set WEBSITE_RUN_FROM_PACKAGE to the full URL of your zip file in Blob Storage. If you're using a SAS token, make sure it’s valid.

4. Sync triggers (if needed) If you’re using non-HTTP triggers (like timer or queue), run this command to make sure Azure picks them up after deployment:

az functionapp sync-function-triggers --name <your-app-name> --resource-group <your-rg-name>

5. Watch out for naming conflicts Avoid naming any of your files or folders after built-in Python modules (e.g., json.py, email.py)—those can mess things up.

If everything's set up properly, your function should run just fine with all dependencies included.

Reference:

Run functions from a package file

Python developer guide for Azure Functions

Deployment options overview

Rkdm 0

Hello Sai Prabhu Naveen Parimi,

Thank you for your reply.
I am using The Python v2 programming model, is it mandatory to use v1 in this case ? here is what I have :

File Structure

functionapp.zip
├── function_app.py
├── host.json
├── requirements.txt
└── .python_packages/
    └── lib/
        └── site-packages/
            ├── azure_storage_blob/
            └── other_dependencies/

Requirements.txt

azure-functions
azure-storage-blob

Content of function :

import azure.functions as func
import os,sys
app = func.FunctionApp()
# === Configuration globale ===
@app.function_name(name="generate_sas_link")
@app.route(route="generate_sas_link", auth_level="anonymous")
def main(req: func.HttpRequest) -> func.HttpResponse:
    #I put the import here to highlight issue with this module and allow the app to start anyway
	try:
        from azure.storage.blob import generate_blob_sas, BlobSasPermissions
    except Exception as e:
        return func.HttpResponse(
            f"Erreur d'import : {str(e)}",
            status_code=500
        )
        
    # Display simple hello world if it works
    user = req.params.get('user')
    return func.HttpResponse(f"Hello, {user}!", status_code=200)

SAS token expiration is set to 1 year, and I use APP restart from azure portal just in case, which should do resync trigger as well.

Output :
User's image

As you can see, function working and running, the only one issue is the module azure.storage.blob missing. I may have done something wrong but I am not able to identify it.

Note : One thing I have noticed is that expect files at the root folder, the other one are not visible in the App file tab see below :
User's image

1 answer

Your answer

Rkdm 0 Reputation points

2025-04-17T09:55:22.9633333+00:00

Hello Sai Prabhu Naveen Parimi,

Thank you for your reply.
I am using The Python v2 programming model, is it mandatory to use v1 in this case ? here is what I have :

File Structure

functionapp.zip ├── function_app.py ├── host.json ├── requirements.txt └── .python_packages/ └── lib/ └── site-packages/ ├── azure_storage_blob/ └── other_dependencies/

Requirements.txt

azure-functions azure-storage-blob

Content of function :

import azure.functions as func import os,sys app = func.FunctionApp() # === Configuration globale === @app.function_name(name="generate_sas_link") @app.route(route="generate_sas_link", auth_level="anonymous") def main(req: func.HttpRequest) -> func.HttpResponse: #I put the import here to highlight issue with this module and allow the app to start anyway try: from azure.storage.blob import generate_blob_sas, BlobSasPermissions except Exception as e: return func.HttpResponse( f"Erreur d'import : {str(e)}", status_code=500 ) # Display simple hello world if it works user = req.params.get('user') return func.HttpResponse(f"Hello, {user}!", status_code=200)

SAS token expiration is set to 1 year, and I use APP restart from azure portal just in case, which should do resync trigger as well.

Output :

As you can see, function working and running, the only one issue is the module azure.storage.blob missing. I may have done something wrong but I am not able to identify it.

Note : One thing I have noticed is that expect files at the root folder, the other one are not visible in the App file tab see below :

Answer 1

Rkdm 0

I finally found my issue :

Everything was set up properly, issue came from the way I generated the zip from Windows os. Windows's Compress-Archive command doesn't respect ZIP standard and backslashes are used instead of forward slashes. Azure function run into a Linux consumption plan, which requires forward slashes. I used 7zip to generate the archive :

& $7ZipPath a -tzip $ZipName * .python_packages

Ankur Bhambri 0 Reputation points Microsoft Employee

2025-05-26T15:45:44.0833333+00:00

Don't push .python_packages in a manual way, try with deployment steps.

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How to deploy python function on Azure Fuctions - Linux consumption plan

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