[BUG] Azure Function Middleware does not assign Service.Environment

[mmodolo]

Currently it has no way to pass the service environment to apm. It could be easily added somewhere around the line below reading from "DOTNET_ENVIRONMENT" environment variable for example.

Does it have any appetite on adding it? Thanks!

apm-agent-dotnet/src/azure/Elastic.Apm.Azure.Functions/AzureFunctionsContext.cs

Line 48 in 038ece7

service.Framework = new() { Name = "Azure Functions", Version = MetaData.FunctionsExtensionVersion };

[rfavreau]

Hello @mmodolo,

To pass the environment to apm, add the environment variable "ELASTIC_APM_ENVIRONMENT". This variable can be set by the application settings in the Azure Portal.

You can also set this setting during the startup of the Azure Function:

new HostBuilder()
        .ConfigureFunctionsWorkerDefaults((context, builder) =>
        {
            Environment.SetEnvironmentVariable("ELASTIC_APM_ENVIRONMENT", context.HostingEnvironment.EnvironmentName);
            builder.UseMiddleware<ApmMiddleware>();
        })
        .Build()
        .Run();

With Azure Function, you must use AZURE_FUNCTIONS_ENVIRONMENT to set the environment and not DOTNET_ENVIRONMENT or ASPNETCORE_ENVIRONMENT.

[stevejgordon]

I'm going to close this as answered. I've opened #2507 to include more details in the docs.