public async Task <T> DeleteNamespacedAsync <T>(string ns, string name, CancellationToken cancel = default)
where T : IKubernetesObject
{
var resp = await kubernetes.DeleteNamespacedCustomObjectWithHttpMessagesAsync(group, version, ns, plural, name, cancellationToken : cancel).ConfigureAwait(false);
return(KubernetesJson.Deserialize <T>(resp.Body.ToString()));
}
public async Task <T> ListAsync <T>(CancellationToken cancel = default)
where T : IKubernetesObject
{
var resp = await kubernetes.ListClusterCustomObjectWithHttpMessagesAsync(group, version, plural, cancellationToken : cancel).ConfigureAwait(false);
return(KubernetesJson.Deserialize <T>(resp.Body.ToString()));
}
internal static async IAsyncEnumerable <(WatchEventType, T)> CreateWatchEventEnumerator(
Func <Task <TextReader> > streamReaderCreator,
Action <Exception> onError = null,
[EnumeratorCancellation] CancellationToken cancellationToken = default)
{
Task <TR> AttachCancellationToken <TR>(Task <TR> task)
{
if (!task.IsCompleted)
{
// here to pass cancellationToken into task
return(task.ContinueWith(t => t.GetAwaiter().GetResult(), cancellationToken));
}
return(task);
}
using var streamReader = await AttachCancellationToken(streamReaderCreator ()).ConfigureAwait(false);
for (; ;)
{
// ReadLineAsync will return null when we've reached the end of the stream.
var line = await AttachCancellationToken(streamReader.ReadLineAsync()).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
if (line == null)
{
yield break;
}
WatchEvent @event = null;
try
{
var genericEvent = KubernetesJson.Deserialize <Watcher <KubernetesObject> .WatchEvent>(line);
if (genericEvent.Object.Kind == "Status")
{
var statusEvent = KubernetesJson.Deserialize <Watcher <V1Status> .WatchEvent>(line);
var exception = new KubernetesException(statusEvent.Object);
onError?.Invoke(exception);
}
else
{
@event = KubernetesJson.Deserialize <WatchEvent>(line);
}
}
catch (Exception e)
{
onError?.Invoke(e);
}
if (@event != null)
{
yield return(@event.Type, @event.Object);
}
}
}
/// <summary>
/// Implementation of the proposal for out-of-tree client
/// authentication providers as described here --
/// https://github.com/kubernetes/community/blob/master/contributors/design-proposals/auth/kubectl-exec-plugins.md
/// Took inspiration from python exec_provider.py --
/// https://github.com/kubernetes-client/python-base/blob/master/config/exec_provider.py
/// </summary>
/// <param name="config">The external command execution configuration</param>
/// <returns>
/// The token, client certificate data, and the client key data received from the external command execution
/// </returns>
public static ExecCredentialResponse ExecuteExternalCommand(ExternalExecution config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
var process = CreateRunnableExternalProcess(config);
try
{
process.Start();
}
catch (Exception ex)
{
throw new KubeConfigException($"external exec failed due to: {ex.Message}");
}
var stdout = process.StandardOutput.ReadToEnd();
var stderr = process.StandardError.ReadToEnd();
if (string.IsNullOrWhiteSpace(stderr) == false)
{
throw new KubeConfigException($"external exec failed due to: {stderr}");
}
// Wait for a maximum of 5 seconds, if a response takes longer probably something went wrong...
process.WaitForExit(5);
try
{
var responseObject = KubernetesJson.Deserialize <ExecCredentialResponse>(stdout);
if (responseObject == null || responseObject.ApiVersion != config.ApiVersion)
{
throw new KubeConfigException(
$"external exec failed because api version {responseObject.ApiVersion} does not match {config.ApiVersion}");
}
if (responseObject.Status.IsValid())
{
return(responseObject);
}
else
{
throw new KubeConfigException($"external exec failed missing token or clientCertificateData field in plugin output");
}
}
catch (JsonException ex)
{
throw new KubeConfigException($"external exec failed due to failed deserialization process: {ex}");
}
catch (Exception ex)
{
throw new KubeConfigException($"external exec failed due to uncaught exception: {ex}");
}
}
public async Task <int> NamespacedPodExecAsync(string name, string @namespace, string container,
IEnumerable <string> command, bool tty, ExecAsyncCallback action, CancellationToken cancellationToken)
{
// All other parameters are being validated by MuxedStreamNamespacedPodExecAsync
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
try
{
using (var muxedStream = await MuxedStreamNamespacedPodExecAsync(
name,
@namespace, command, container, tty: tty,
cancellationToken: cancellationToken).ConfigureAwait(false))
using (var stdIn = muxedStream.GetStream(null, ChannelIndex.StdIn))
using (var stdOut = muxedStream.GetStream(ChannelIndex.StdOut, null))
using (var stdErr = muxedStream.GetStream(ChannelIndex.StdErr, null))
using (var error = muxedStream.GetStream(ChannelIndex.Error, null))
using (var errorReader = new StreamReader(error))
{
muxedStream.Start();
await action(stdIn, stdOut, stdErr).ConfigureAwait(false);
var errors = await errorReader.ReadToEndAsync().ConfigureAwait(false);
// StatusError is defined here:
// https://github.com/kubernetes/kubernetes/blob/068e1642f63a1a8c48c16c18510e8854a4f4e7c5/staging/src/k8s.io/apimachinery/pkg/api/errors/errors.go#L37
var returnMessage = KubernetesJson.Deserialize <V1Status>(errors);
return(GetExitCodeOrThrow(returnMessage));
}
}
catch (HttpOperationException httpEx) when(httpEx.Body is V1Status)
{
throw new KubernetesException((V1Status)httpEx.Body, httpEx);
}
}
protected async Task <WebSocket> StreamConnectAsync(Uri uri, string webSocketSubProtocol = null, Dictionary <string, List <string> > customHeaders = null, CancellationToken cancellationToken = default)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
// Create WebSocket transport objects
var webSocketBuilder = CreateWebSocketBuilder();
// Set Headers
if (customHeaders != null)
{
foreach (var header in customHeaders)
{
webSocketBuilder.SetRequestHeader(header.Key, string.Join(" ", header.Value));
}
}
// Set Credentials
if (this.ClientCert != null)
{
webSocketBuilder.AddClientCertificate(this.ClientCert);
}
if (this.HttpClientHandler != null)
{
#if NET5_0_OR_GREATER
foreach (var cert in this.HttpClientHandler.SslOptions.ClientCertificates.OfType <X509Certificate2>())
#else
foreach (var cert in this.HttpClientHandler.ClientCertificates.OfType <X509Certificate2>())
#endif
{
webSocketBuilder.AddClientCertificate(cert);
}
}
if (Credentials != null)
{
// Copy the default (credential-related) request headers from the HttpClient to the WebSocket
var message = new HttpRequestMessage();
await Credentials.ProcessHttpRequestAsync(message, cancellationToken).ConfigureAwait(false);
foreach (var header in message.Headers)
{
webSocketBuilder.SetRequestHeader(header.Key, string.Join(" ", header.Value));
}
}
if (this.CaCerts != null)
{
webSocketBuilder.ExpectServerCertificate(this.CaCerts);
}
if (this.SkipTlsVerify)
{
webSocketBuilder.SkipServerCertificateValidation();
}
if (webSocketSubProtocol != null)
{
webSocketBuilder.Options.AddSubProtocol(webSocketSubProtocol);
}
// Send Request
cancellationToken.ThrowIfCancellationRequested();
WebSocket webSocket = null;
try
{
webSocket = await webSocketBuilder.BuildAndConnectAsync(uri, CancellationToken.None)
.ConfigureAwait(false);
}
catch (WebSocketException wse) when(wse.WebSocketErrorCode == WebSocketError.HeaderError ||
(wse.InnerException is WebSocketException &&
((WebSocketException)wse.InnerException).WebSocketErrorCode ==
WebSocketError.HeaderError))
{
// This usually indicates the server sent an error message, like 400 Bad Request. Unfortunately, the WebSocket client
// class doesn't give us a lot of information about what went wrong. So, retry the connection.
var uriBuilder = new UriBuilder(uri);
uriBuilder.Scheme = uri.Scheme == "wss" ? "https" : "http";
var response = await HttpClient.GetAsync(uriBuilder.Uri, cancellationToken).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.SwitchingProtocols)
{
// This should never happen - the server just allowed us to switch to WebSockets but the previous call didn't work.
// Rethrow the original exception
response.Dispose();
throw;
}
else
{
#if NET5_0_OR_GREATER
var content = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
#else
var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
#endif
// Try to parse the content as a V1Status object
var genericObject = KubernetesJson.Deserialize <KubernetesObject>(content);
V1Status status = null;
if (genericObject.ApiVersion == "v1" && genericObject.Kind == "Status")
{
status = KubernetesJson.Deserialize <V1Status>(content);
}
var ex =
new HttpOperationException(
$"The operation returned an invalid status code: {response.StatusCode}", wse)
{
Response = new HttpResponseMessageWrapper(response, content),
Body = status != null ? (object)status : content,
};
response.Dispose();
throw ex;
}
}
catch (Exception)
{
throw;
}
return(webSocket);
}
