Monitoring Azure Function Consumption Plan Instance Scale Out

Monitoring Azure Function Consumption Plan Instance Scale Out

With the Consumption Plan hosting model for Azure Functions, we can take advantage of event-driven scaling to automatically spin up extra instances of a Function app based on load. In this post, we’ll cover how you can view this in real-time and also how to chart the scaled-out instances retrospectively over time.

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E2E Testing Azure Functions

Scenario Recently I was working on a solution which included multiple Azure Function apps, with unit tests (xUnit) giving rapid feedback for discrete components across the solution in isolation. But the next step was to create some automated end-to-end (E2E) tests that exercised the behaviours of the solution as a whole. The goal was to be able to get that feedback as early on in the development process as possible which meant being able to run those E2E tests against a local build on a dev machine when needed with minimal hassle, and in an Azure DevOps CI/CD pipeline, without requiring the Azure Functions to be deployed first. [Read More]

Troubleshooting Azure Function Consumption Plan Scaling

I recently encountered an issue with an Azure Function Event Hub trigger running on a Linux Consumption Plan, whereby events stopped being consumed by the trigger once it went to sleep. I learned a lot about consumption plan scaling and diagnosing what was going on, so in this post I’m going to share the key takeaways that I picked up as it was a bit of a journey. Background: Azure Function Event Hub trigger stopped processing events This was in a low-throughput scenario for testing - so the rate of events coming into the Event Hub was low/sporadic. [Read More]

Configuring Azure Storage Emulator SQL Server Instance

If you’re using Windows Azure Storage, you are almost certainly going to be running the storage emulator during development, instead of working directly against your storage account up in the cloud. This emulator (which comes in the Windows Azure SDK - see the “other” category), allows you to test locally against local instances of Blob, Queue and Table services. As per the Overview of Running a Windows Azure Application with Storage Emulator reference, the emulator needs a local SQL Server instance. [Read More]
Azure 

Error Creating Azure Blob Storage Container

I received a rather…vague…error when trying out a bit of .NET code to connect to a Windows Azure Blob Storage account, and create a new container in which to store some blobs. The code CloudStorageAccount storageAccount = CloudStorageAccount.Parse( "DefaultEndpointsProtocol=https;AccountName=REMOVED;AccountKey=REMOVED"); CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient(); CloudBlobContainer container = blobClient.GetContainerReference("TestContainer1"); container.CreateIfNotExist(); // This error'd The error A StorageClientException was thrown saying “One of the request inputs is out of range.”. An inner WebException showed that “The remote server returned an error: (400) Bad Request. [Read More]
.NET  Azure