I am using a Docker image as my function app container and one thing I want to configure is the path to the entry point of the function app. It is function_app.py in v2 programming model. I am wondering whether there is a way to specify the path or name to such a entry point file.
I hope the entry file path or name can be configurable.
You can run the Python Azure function without mentioning EntryPoint in Dockerfile.
I have created a Python V2 Azure function.
Dockerfile:
FROM mcr.microsoft.com/azure-functions/python:4-python3.11
ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
AzureFunctionsJobHost__Logging__Console__IsEnabled=true
COPY requirements.txt /
RUN pip install -r /requirements.txt
COPY . /home/site/wwwroot
The entry point for the docker container is managed by the Azure Functions runtime which is specified in the base image in Docker file mcr.microsoft.com/azure-functions/python:4-python3.11.
The function runtime looks for the function files in /home/site/wwwroot directory, where the application code is copied to by the COPY . /home/site/wwwroot command.
When you run docker run locally, the Azure Functions runtime starts up and look for the function definitions in the /home/site/wwwroot directory and manages the execution of the functions based on the triggers (Http, Timer etc.,) defined.
function_app.py:
app = func.FunctionApp()
@app.route(route="http_trigger", auth_level=func.AuthLevel.ANONYMOUS)
def http_trigger(req: func.HttpRequest) -> func.HttpResponse:
logging.info('Python HTTP trigger function processed a request.')
name = req.params.get('name')
if not name:
try:
req_body = req.get_json()
except ValueError:
pass
else:
name = req_body.get('name')
if name:
return func.HttpResponse(f"Hello, {name}. This HTTP triggered function executed successfully.")
else:
return func.HttpResponse(
"This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.",
status_code=200
)
Build the docker image:
Command: docker build -t <Image_Name> .
C:\Users\uname\pydockerfn>docker build -t <Image> .
[+] Building 1.1s (9/9) FINISHED docker:desktop-linux
=> [internal] load build definition from Dockerfile 0.1s
=> => transferring dockerfile: 466B 0.1s
=> [internal] load metadata for mcr.microsoft.com/azure-functions/python:4-python3.11 0.5s
=> [internal] load .dockerignore 0.1s
=> => transferring context: 59B 0.0s
=> [1/4] FROM mcr.microsoft.com/azure-functions/python:4-python3.11@XX256:51353837a9b2830XXXd0cc713016da2a6f4bc5 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 701B 0.0s
=> CACHED [2/4] COPY requirements.txt / 0.0s
=> CACHED [3/4] RUN pip install -r /requirements.txt 0.0s
=> CACHED [4/4] COPY . /home/site/wwwroot 0.0s
=> exporting to image 0.1s
=> => exporting layers 0.0s
=> => writing image XX256:7311206332f492a6b1cXXXb684eebd0f4740ec14df5169b 0.0s
=> => naming to docker.io/<Image>
Run the image in local container:
Command: docker run -p 8080:80 <Image_Name>
C:\Users\uname\pydockerfn>docker run -p 8080:80 -it pravallikakv/pydocerfn
WEBSITES_INCLUDE_CLOUD_CERTS is not set to true.
info: Host.Triggers.Warmup[0]
Initializing Warmup Extension.
info: Host.Startup[503]
Initializing Host. OperationId: 'fc439677-86bb-4fa7-b088-ba76773ec9b5'.
info: Host.Startup[504]
Host initialization: ConsecutiveErrors=0, StartupCount=1, OperationId=fc439677-86bb-4fa7-b088-ba76773ec9b5
info: Microsoft.Azure.WebJobs.Hosting.OptionsLoggingService[0]
//Removed few logs
info: Host.Startup[412]
Host initialized (164ms)
info: Host.Startup[413]
Host started (199ms)
info: Host.Startup[0]
Job host started
Hosting environment: Production
Content root path: /azure-functions-host
Now listening on: http://[::]:80
Application started. Press Ctrl+C to shut down.
info: Host.General[337]
Host lock lease acquired by instance ID '0000000000000000000000009ED2BB0B'.
info: Function.http_trigger[1]
Executing 'Functions.http_trigger' (Reason='This function was programmatically called via the host APIs.', Id=f013216f-aecd-4a4d-b924-4263c153440e)
info: Function.http_trigger.User[0]
Python HTTP trigger function processed a request.
info: Function.http_trigger[2]
Executed 'Functions.http_trigger' (Succeeded, Id=f013216f-aecd-4a4d-b924-4263c153440e, Duration=159ms)