Azure Queue Storage

This health check verifies the ability to communicate with Azure Queue Storage. It uses the provided QueueServiceClient to get first queue or configured queues properties.

Installation

• .NET CLI
• Package Reference
• Nuget

dotnet add package AspNetCore.Pulse.Azure.Storage.Queues --version 8.0.4

Defaults

By default, the QueueServiceClient instance is resolved from service provider. AzureQueueStorageHealthCheckOptions does not provide any specific queue name, so the health check fetches just first queue.

void Configure(IHealthChecksBuilder builder)
{
    builder.Services.AddSingleton(sp => new QueueServiceClient(new Uri("azure-queue-storage-uri"), new DefaultAzureCredential()));
    builder.AddHealthChecks().AddAzureQueueStorage();
}

Customization

You can additionally add the following parameters:

• clientFactory: A factory method to provide QueueServiceClient instance.
• optionsFactory: A factory method to provide AzureQueueStorageHealthCheckOptions instance. It allows to specify the queue name.
• name: The health check name. The default is azure_queue_storage.
• failureStatus: The HealthStatus that should be reported when the health check fails. Default is HealthStatus.Unhealthy.
• tags: A list of tags that can be used to filter sets of health checks.
• timeout: A System.TimeSpan representing the timeout of the check.

void Configure(IHealthChecksBuilder builder)
{
    builder.Services.AddSingleton(sp => new QueueServiceClient(new Uri("azure-queue-storage-uri"), new DefaultAzureCredential()));
    builder.AddHealthChecks().AddAzureQueueStorage(
        optionsFactory: sp => new AzureQueueStorageHealthCheckOptions()
        {
            QueueName = "demo"
        });
}

Breaking changes

In the prior releases, AzureQueueStorageHealthCheck was a part of Pulse.AzureStorage package. It had a dependency on not just Azure.Storage.Queues, but also Azure.Storage.Files.Shares and Azure.Storage.Blobs. The packages have been split to avoid bringing unnecessary dependencies. Moreover, AzureQueueStorageHealthCheck was letting the users specify how QueueServiceClient should be created (from raw connection string or an endpoint with managed identity credentials), at a cost of maintaining an internal, static client instances cache. Now the type does not create client instances nor maintain an internal cache and it’s the caller responsibility to provide the instance of ShareServiceClient (please see #2040 for more details). Since Azure SDK recommends treating clients as singletons and client instances can be expensive to create, it’s recommended to register a singleton factory method for Azure SDK clients. So the clients are created only when needed and once per whole application lifetime.