kubernetes/kops · error

building http client: %w

Error message

building http client: %w

What it means

Wraps a failure of rest.HTTPClientFor in clusterInfo.HTTPClient: an *http.Client could not be built from the REST config, typically because a custom transport/TLS/auth option in the kubeconfig is invalid. The dynamic-client construction path fails before any request is sent.

Source

Thrown at cmd/kops/util/factory.go:216

}

func configureRESTConfig(restConfig *rest.Config) {
	restConfig.UserAgent = "kops"
	restConfig.Burst = 50
	restConfig.QPS = 20
	restConfig.AcceptContentTypes = runtime.ContentTypeProtobuf
	restConfig.ContentType = runtime.ContentTypeProtobuf
}

func (f *Factory) HTTPClient(restConfig *rest.Config) (*http.Client, error) {
	return rest.HTTPClientFor(restConfig)
}

func (f *clusterInfo) HTTPClient(restConfig *rest.Config) (*http.Client, error) {
	if f.cachedHTTPClient == nil {
		httpClient, err := rest.HTTPClientFor(restConfig)
		if err != nil {
			return nil, fmt.Errorf("building http client: %w", err)
		}
		f.cachedHTTPClient = httpClient
	}
	return f.cachedHTTPClient, nil
}

// DynamicClient returns a dynamic client
func (f *Factory) DynamicClient(ctx context.Context, cluster *kops.Cluster, options kubeconfig.CreateKubecfgOptions) (dynamic.Interface, error) {
	clusterInfo := f.getClusterInfo(cluster, options)
	restConfig, err := clusterInfo.RESTConfig(ctx)
	if err != nil {
		return nil, err
	}
	return clusterInfo.DynamicClient(restConfig)
}

func (f *clusterInfo) DynamicClient(restConfig *rest.Config) (dynamic.Interface, error) {
	if f.cachedDynamicClient == nil {

View on GitHub (pinned to 4c8573c808)

Solutions

1. Check proxy and TLS settings in kubeconfig
2. Remove unsupported exec/auth-plugin config
3. Regenerate kubeconfig with kops export kubecfg

When it happens

Trigger: Thrown at cmd/kops/util/factory.go:216 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/ac0fd8bb97726138. Report an issue: GitHub.