Setup Azure function (ServiceBus and HTTP based trigger ) with Docker Container Image

 To setup Azure function we first need to choose the azure hosting plans.

• Consumption Plan
• Premium Plan
• Dedicated Plan (App Service Plan)

In this blog, we will see how to create a Azure function using App Service plan and configured it with Docker container image.

Once you have your azure function created in azure you can start configuring triggers.

• Create a file called function_app.py using VS code.
• Add below code to it.

import azure.functions as func

import json

import logging

import time

app = func.FunctionApp()

#Function 1 - ServiceBus Triggered

@app.function_name('ServiceBusTrigger-Function')

@app.service_bus_queue_trigger(arg_name="message",

                               queue_name="my-servicebus-queue-name",

                               connection="ServiceBusConnectionString")

def main(message: func.ServiceBusMessage):

    logging.info(json.loads(message.get_body()))

   

    logging.info("Start: The time of code execution begin is : %s", time.ctime())

    time.sleep(300)

    # your processing logic

   

    logging.info("End : %s", time.ctime())

#Function 2 - Http Triggered

@app.function_name('HttpTrigger-Function')

@app.route(route="payload", auth_level=func.AuthLevel.ANONYMOUS)

def get_metadata(httpReq: func.HttpRequest) -> httpReq.HttpResponse:

    return func.HttpResponse(json.dumps(httpReq.get_body()))

•  local.settings.json file to store function parameters value to run azure function locally.

{

  "IsEncrypted": false,

  "Values": {

    "AzureWebJobsStorage": "DefaultEndpointsProtocol=https;AccountName=stg;AccountKey=abcdef==;EndpointSuffix=core.windows.net",

    "ServiceBusConnectionString": "Endpoint=sb://my-sbns.servicebus.windows.net/;SharedAccessKeyName=SharedAccessKey=abcdefghi=",

    "FUNCTIONS_WORKER_RUNTIME": "python",

    "my-servicebus-queue-name": "queue-name"

  }

}

• We can use App Service - App Settings to configure the parameters values, Also we need to set Docker image related parameters for Deployment.

[

  {

    "name": "APPLICATIONINSIGHTS_CONNECTION_STRING",

    "value": "InstrumentationKey=abcdef-4tgh-4567-jkih-tryrtyrtyr;IngestionEndpoint=https://ai.azure.com/;LiveEndpoint=https://es2.livediagnostics.monitor.azure.com/",

    "slotSetting": false

  },

  {

    "name": "AzureWebJobsStorage",

    "value": "DefaultEndpointsProtocol=https;AccountName=acctest;AccountKey=abcde==;EndpointSuffix=core.windows.net",

    "slotSetting": false

  },

  {

    "name": "DOCKER_REGISTRY_SERVER_PASSWORD",

    "value": "abcdefghijklmnopqrstuvwxyz",

    "slotSetting": false

  },

  {

    "name": "DOCKER_REGISTRY_SERVER_URL",

    "value": "https://mydemoacrtest.azurecr.io",

    "slotSetting": false

  },

  {

    "name": "DOCKER_REGISTRY_SERVER_USERNAME",

    "value": "mydemoacrtest",

    "slotSetting": false

  },

  {

    "name": "FUNCTIONS_EXTENSION_VERSION",

    "value": "~4",

    "slotSetting": false

  },

  {

    "name": "FUNCTIONS_WORKER_RUNTIME",

    "value": "python",

    "slotSetting": false

  },

  {

    "name": "ServiceBusConnectionString",

    "value": "Endpoint=sb://my-sbns.servicebus.windows.net/;SharedAccessKeyName=;SharedAccessKey=abcde=",

    "slotSetting": false

  },

  {

    "name": "WEBSITES_ENABLE_APP_SERVICE_STORAGE",

    "value": "false",

    "slotSetting": false

  }

]

This is the folder structure.

Thanks for reading, CloudOps ⌂Signing Off! 😊