Kubernetes SDK for .NET

The Kubernetes SDK for .NET is a set of libraries and tools to develop software which interacts with the Kubernetes open source container orchestrator.

The project is in a early stage but should already be quiet usable.

Advantages over the official Kubernetes client for .NET:

• Nullable annotations
• Compatible with AOT
• Seamless integration with Microsoft.Extensions.DependencyInjection and Microsoft.Extensions.Http
• Supports .NET Tracing and Metrics including OpenTelemetry
• Works with Windows containers

The Kubernetes SDK for .NET

All libraries and tools are compatible with the following runtimes:

• netstandard >= 2.0
• .NET Framework >= 4.6.2
• .NET >= 6.0

The SDK is compatible with AOT compilation and uses static code generation for JSON and YAML serialization.

Quick start

Install the client NuGet package:

dotnet add package KubernetesSdk.Client

List namespaces in current cluster

using Kubernetes.Client;
using Kubernetes.Models;

var client = new KubernetesClient();
V1NamespaceList namespaces = await client.CoreV1().ListNamespaceAsync();
foreach (V1Namespace ns in namespaces.Items)
{
    Console.WriteLine(ns.Metadata?.Name);
}

Configuring the client

By default the KubernetesClient constructor will resolve it's configuration from ~/.kube/config, or, when running in a cluster, from the in-cluster config.

You can explicitly pass an instance of KubernetesClientOptions to the constructor, by either manually configuring an instance of KubernetesClientOptions, or by using one of the pre-defined option providers DefaultOptionsProvider, KubeConfigOptionsProvider or InClusterOptionsProvider:

var optionsProvider = new KubeConfigOptionsProvider() { Context = "my-context" };
KubernetesCLientOptions options = optionsProvider.CreateOptions();
var client = new KubernetesClient(options);

The code above will instantiate a new KubernetesClient using the options resolved from the cluster context my-context defined in the ~/.kube/config file.

Using the Microsoft.Extensions integration

If you want to use the integration with Microsoft.Extensions.DependencyInjection and Microsoft.Extensions.Http you need to install the following package:

dotnet add package KubernetesSdk.Client.Extensions.DependencyInjection

Registering the client with the DI container is done using the AddKubernetesClient() extension method:

using Kubernetes.Client.Extensions.DependencyInjection;

using IHost host =
    Host.CreateDefaultBuilder(args)
        .ConfigureServices(
            services =>
            {
                services.AddKubernetesClient();
            })
        .Build();

The above code will register the KubernetesClient using default configuration. To use non-default configuration you can call one of the various ConfigureXX() methods on the client builder:

services.AddKubernetesClient()
        .ConfigureFromKubeConfig();

Registering named clients

For advanced scenarios it is also possible to register multiple clients with different configuration. To register a named client simply pass a name to the AddKubernetesClient() extension method:

services.AddKubernetesClient("Client1");

Named clients can be resolved using the IKubernetesClientFactory:

var clientFactory = serviceProvider.GetRequiredService<IKubernetesClientFactory>();
KubernetesClient client = clientFactory.CreateClient("Client1");

Note that the name for the default client is string.Empty and can always be resolved directly, without using the factory.