Home

Awesome

Kubernetes C# Client

Github Actions Build Client Capabilities Client Support Level

Usage

KubernetesClient

dotnet add package KubernetesClient

Generate with Visual Studio

dotnet msbuild /Restore /t:SlnGen kubernetes-client.proj

Authentication/Configuration

You should be able to use a standard KubeConfig file with this library, see the BuildConfigFromConfigFile function below. Most authentication methods are currently supported, but a few are not, see the known-issues.

You should also be able to authenticate with the in-cluster service account using the InClusterConfig function shown below.

Monitoring

Metrics are built in to HttpClient using System.Diagnostics.DiagnosticsSource. https://learn.microsoft.com/en-us/dotnet/core/diagnostics/built-in-metrics-system-net

There are many ways these metrics can be consumed/exposed but that decision is up to the application, not KubernetesClient itself. https://learn.microsoft.com/en-us/dotnet/core/diagnostics/metrics-collection

Sample Code

Creating the client

// Load from the default kubeconfig on the machine.
var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();

// Load from a specific file:
var config = KubernetesClientConfiguration.BuildConfigFromConfigFile(Environment.GetEnvironmentVariable("KUBECONFIG"));

// Load from in-cluster configuration:
var config = KubernetesClientConfiguration.InClusterConfig()

// Use the config object to create a client.
var client = new Kubernetes(config);

Listing Objects

var namespaces = client.CoreV1.ListNamespace();
foreach (var ns in namespaces.Items) {
    Console.WriteLine(ns.Metadata.Name);
    var list = client.CoreV1.ListNamespacedPod(ns.Metadata.Name);
    foreach (var item in list.Items)
    {
        Console.WriteLine(item.Metadata.Name);
    }
}

Creating and Deleting Objects

var ns = new V1Namespace
{
    Metadata = new V1ObjectMeta
    {
        Name = "test"
    }
};

var result = client.CoreV1.CreateNamespace(ns);
Console.WriteLine(result);

var status = client.CoreV1.DeleteNamespace(ns.Metadata.Name, new V1DeleteOptions());

Examples

There is extensive example code in the examples directory.

Running the examples

git clone git@github.com:kubernetes-client/csharp.git
cd csharp\examples\simple
dotnet run

Known issues

While the preferred way of connecting to a remote cluster from local machine is:

var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();
var client = new Kubernetes(config);

Not all auth providers are supported at the moment #91. You can still connect to a cluster by starting the proxy command:

$ kubectl proxy
Starting to serve on 127.0.0.1:8001

and changing config:

var config = new KubernetesClientConfiguration {  Host = "http://127.0.0.1:8001" };

Notice that this is a workaround and is not recommended for production use.

Testing

The project uses XUnit as unit testing framework.

To run the tests:

cd csharp\tests
dotnet restore
dotnet test

Update the API model

Prerequisites

You'll need a Linux machine with Docker.

Check out the generator project into some other directory (henceforth $GEN_DIR).

cd $GEN_DIR/..
git clone https://github.com/kubernetes-client/gen

Generating new swagger.json

# Where REPO_DIR points to the root of the csharp repository
cd
${GEN_DIR}/openapi/csharp.sh ${REPO_DIR}/src/KubernetesClient ${REPO_DIR}/csharp.settings

Version Compatibility

SDK VersionKubernetes Version.NET Targeting
14.01.30net6.0;net8.0;net48*;netstandard2.0*
13.01.29net6.0;net7.0;net8.0;net48*;netstandard2.0*
12.01.28net6.0;net7.0;net48*;netstandard2.0*
11.01.27net6.0;net7.0;net48*;netstandard2.0*
10.01.26net6.0;net7.0;net48*;netstandard2.0*
9.11.25netstandard2.1;net6.0;net7.0;net48*;netstandard2.0*
9.01.25netstandard2.1;net5.0;net6.0;net48*;netstandard2.0*
8.01.24netstandard2.1;net5.0;net6.0;net48*;netstandard2.0*
7.21.23netstandard2.1;net5.0;net6.0;net48*;netstandard2.0*
7.01.23netstandard2.1;net5.0;net6.0
6.01.22netstandard2.1;net5.0
5.01.21netstandard2.1;net5
4.01.20netstandard2.0;netstandard2.1
3.01.19netstandard2.0;net452
2.01.18netstandard2.0;net452
1.61.16netstandard1.4;netstandard2.0;net452;
1.41.13netstandard1.4;net451
1.31.12netstandard1.4;net452

Contributing

Please see CONTRIBUTING.md for instructions on how to contribute.