AspNetCore.HealthChecks.Azure.Storage.Blobs 9.0.0

Azure Blob Storage Health Check

This health check verifies the ability to communicate with Azure Blob Storage. It uses the provided BlobServiceClient to get first or configured blob container.

Defaults

By default, the BlobServiceClient instance is resolved from service provider. AzureBlobStorageHealthCheckOptions does not provide any specific container name, so the health check fetches just first container.

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

Customization

You can additionally add the following parameters:

  • clientFactory: A factory method to provide BlobServiceClient instance.
  • optionsFactory: A factory method to provide AzureBlobStorageHealthCheckOptions instance. It allows to specify the container name.
  • name: The health check name. The default is azure_blob_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 BlobServiceClient(new Uri("azure-blob-storage-uri"), new DefaultAzureCredential()));
    builder.AddHealthChecks().AddAzureBlobStorage(
        optionsFactory: sp => new AzureBlobStorageHealthCheckOptions()
        {
            ContainerName = "demo"
        });
}

Breaking changes

In the prior releases, AzureBlobStorageHealthCheck was a part of HealthChecks.AzureStorage package. It had a dependency on not just Azure.Storage.Blobs, but also Azure.Storage.Queues and Azure.Storage.Files.Shares. The packages have been split to avoid bringing unnecessary dependencies. Moreover, AzureBlobStorageHealthCheck was letting the users specify how BlobServiceClient should be created (from raw connection string or from endpoint uri and 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 BlobServiceClient (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.

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