/// <summary>
/// Add a named <see cref="KubeClientOptions"/> for each context in the local Kubernetes client configuration.
/// </summary>
/// <param name="services">
/// The service collection to configure.
/// </param>
/// <param name="kubeConfigFileName">
/// The optional name of a specific configuration file to use (defaults to "$HOME/.kube/config").
/// </param>
/// <param name="defaultKubeNamespace">
/// The default namespace to use (if not specified, "default" is used).
/// </param>
/// <returns>
/// The configured service collection.
/// </returns>
public static IServiceCollection AddKubeClientOptionsFromKubeConfig(this IServiceCollection services, string kubeConfigFileName = null, string defaultKubeNamespace = "default")
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
if (String.IsNullOrWhiteSpace(defaultKubeNamespace))
{
throw new ArgumentException("Argument cannot be null, empty, or entirely composed of whitespace: 'defaultNamespace'.", nameof(defaultKubeNamespace));
}
if (String.IsNullOrWhiteSpace(kubeConfigFileName))
{
kubeConfigFileName = Path.GetFullPath(Path.Combine(
Environment.GetEnvironmentVariable("HOME"),
".kube",
"config"
));
}
FileInfo kubeConfigFile = new FileInfo(kubeConfigFileName);
K8sConfig config = K8sConfig.Load(kubeConfigFile);
foreach (Context targetContext in config.Contexts) // AF: List of contexts is static for application lifetime, but config for those contexts is dynamic.
{
services.AddKubeClientOptions(targetContext.Name, kubeClientOptions =>
{
Cluster targetCluster = config.Clusters.Find(cluster => cluster.Name == targetContext.Config.ClusterName);
if (targetCluster == null)
{
throw new InvalidOperationException($"Cannot find a cluster in the Kubernetes client configuration named '{targetContext.Config.ClusterName}'.");
}
UserIdentity targetUser = config.UserIdentities.Find(user => user.Name == targetContext.Config.UserName);
if (targetUser == null)
{
throw new InvalidOperationException($"Cannot find a user identity in the Kubernetes client configuration named '{targetContext.Config.UserName}'.");
}
kubeClientOptions.ApiEndPoint = new Uri(targetCluster.Config.Server);
kubeClientOptions.KubeNamespace = defaultKubeNamespace;
kubeClientOptions.ClientCertificate = targetUser.Config.GetClientCertificate();
kubeClientOptions.CertificationAuthorityCertificate = targetCluster.Config.GetCACertificate();
kubeClientOptions.AccessToken = targetUser.Config.GetRawToken();
});
}
return(services);
}
/// <summary>
/// Add <see cref="KubeClientOptions"/> from local Kubernetes client configuration.
/// </summary>
/// <param name="services">
/// The service collection to configure.
/// </param>
/// <param name="kubeConfigFileName">
/// The optional name of a specific configuration file to use (defaults to "$HOME/.kube/config").
/// </param>
/// <param name="kubeContextName">
/// The optional name of a specific Kubernetes client context to use.
/// </param>
/// <param name="defaultKubeNamespace">
/// The default namespace to use (if not specified, "default" is used).
/// </param>
/// <returns>
/// The configured service collection.
/// </returns>
public static IServiceCollection AddKubeClientOptionsFromKubeConfig(this IServiceCollection services, string kubeConfigFileName = null, string kubeContextName = null, string defaultKubeNamespace = "default")
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
if (String.IsNullOrWhiteSpace(defaultKubeNamespace))
{
throw new ArgumentException("Argument cannot be null, empty, or entirely composed of whitespace: 'defaultNamespace'.", nameof(defaultKubeNamespace));
}
if (String.IsNullOrWhiteSpace(kubeConfigFileName))
{
kubeConfigFileName = Path.GetFullPath(Path.Combine(
Environment.GetEnvironmentVariable("HOME"),
".kube",
"config"
));
}
FileInfo kubeConfigFile = new FileInfo(kubeConfigFileName);
// IOptions<KubeClientOptions>
services.Configure <KubeClientOptions>(kubeClientOptions =>
{
K8sConfig config = K8sConfig.Load(kubeConfigFile);
string targetContextName = kubeContextName ?? config.CurrentContextName;
if (String.IsNullOrWhiteSpace(targetContextName))
{
throw new InvalidOperationException("The kubeContextName parameter was not specified, and the Kubernetes client configuration does not specify a current context.");
}
Context targetContext = config.Contexts.Find(context => context.Name == targetContextName);
if (targetContext == null)
{
throw new InvalidOperationException($"Cannot find a context in the Kubernetes client configuration named '{targetContextName}'.");
}
Cluster targetCluster = config.Clusters.Find(cluster => cluster.Name == targetContext.Config.ClusterName);
if (targetCluster == null)
{
throw new InvalidOperationException($"Cannot find a cluster in the Kubernetes client configuration named '{targetContext.Config.ClusterName}'.");
}
UserIdentity targetUser = config.UserIdentities.Find(user => user.Name == targetContext.Config.UserName);
if (targetUser == null)
{
throw new InvalidOperationException($"Cannot find a user identity in the Kubernetes client configuration named '{targetContext.Config.UserName}'.");
}
kubeClientOptions.ApiEndPoint = new Uri(targetCluster.Config.Server);
kubeClientOptions.KubeNamespace = defaultKubeNamespace;
kubeClientOptions.ClientCertificate = targetUser.Config.GetClientCertificate();
kubeClientOptions.CertificationAuthorityCertificate = targetCluster.Config.GetCACertificate();
kubeClientOptions.AccessToken = targetUser.Config.GetRawToken();
});
return(services);
}
