How to use Azurite blob containers as Azure Function internal storage and as trigger?

Question

I've followed the instructions to download and install Azurite for Linux (Ubuntu 18.04). I want to use it with Azure Storage Explorer (also downloaded and installed) to visually manage/test an Azure Function with BlobTrigger. I understand how to start Azurite and can upload blobs to an emulator container using Storage Exporer.

Cannot figure out:

1. How to connect an Azure Function to an Azurite container to use as the Functions internal storage.

   a. I used "AzureWebJobsStorage": "UseDevelopmentStorage=true" in local.settings.json, but I don't see how that connects the Function to a given container in Azurite

2. How to connect the Function to an Azurite container for BlobTrigger functionality.

   a. Do I need to add a "BlobTrigger": "<azuriteContainerConnectionString>" setting to local.settings.json?

Answer 1

Basically, The Values in local.settings.json is been used to save the environment variable.

The connection string is been declared in function.json. If you are using some language like C# or Java(Languages that need to be compiled, not run directly.), then it always have a declaration part, the declaration part will be convent to function.json after compiled.

I start a Azurite on local, and I try to use the default storage account:

I get the default connection string of blob service:

DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://127.0.0.1:10000/devstoreaccount1;

And I create a C# azure function with blobtrigger:

local.settings.json

{
    "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "DefaultEndpointsProtocol=https;AccountName=0730bowmanwindow;AccountKey=xxxxxx==;EndpointSuffix=core.windows.net",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "str": "DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://127.0.0.1:10000/devstoreaccount1;"
  }
}

Function1.cs

using System;
using System.IO;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;

namespace FunctionApp1
{
    public static class Function1
    {
        [FunctionName("Function1")]
        public static void Run([BlobTrigger("test/{name}", Connection = "str")]Stream myBlob, string name, ILogger log)
        {
            log.LogInformation($"C# Blob trigger function Processed blob\n Name:{name} \n Size: {myBlob.Length} Bytes");
        }
    }
}

It seems works fine:

I set AzureWebJobsStorage to a storage on azure because 10000 port is been used.

This is the doc:

https://learn.microsoft.com/en-us/azure/storage/common/storage-use-azurite?toc=/azure/storage/blobs/toc.json