istio/istio · error

failed to execute command on Ztunnel: %v

Error message

failed to execute command on Ztunnel: %v

What it means

Error "failed to execute command on Ztunnel: %v" thrown in istio/istio.

Source

Thrown at istioctl/pkg/ztunnelconfig/ztunnelconfig.go:533

	common.attach(cmd)
	cmd.PersistentFlags().BoolVarP(&reset, "reset", "r", reset, "Reset levels to default value (warning).")
	cmd.PersistentFlags().StringVar(&loggerLevelString, "level", loggerLevelString,
		fmt.Sprintf("Comma-separated minimum per-logger level of messages to output, in the form of"+
			" [<logger>:]<level>,[<logger>:]<level>,... or <level> to change all active loggers, "+
			"where logger components can be listed by running \"istioctl ztunnel-config log <pod-name[.namespace]>\""+
			", and level can be one of %s", levelListString))
	return cmd
}

func setupZtunnelLogs(kubeClient kube.CLIClient, param, podName, podNamespace string, port int) (string, error) {
	path := "logging"
	if param != "" {
		path = path + "?" + param
	}
	// "Envoy" applies despite this being ztunnel
	result, err := kubeClient.EnvoyDoWithPort(context.TODO(), podName, podNamespace, "POST", path, port)
	if err != nil {
		return "", fmt.Errorf("failed to execute command on Ztunnel: %v", err)
	}
	return string(result), nil
}

// getComponentPodName returns the pod name and namespace of the Istio component
func getComponentPodName(ctx cli.Context, podflag string, enforceSinglePod bool) (string, string, error) {
	// If user passed --namespace, respect it. Else fallback to --istio-namespace (which is typically defaulted, to istio-system).
	return getPodNameWithNamespace(ctx, podflag, enforceSinglePod, model.GetOrDefault(ctx.Namespace(), ctx.IstioNamespace()))
}

func getPodNameWithNamespace(ctx cli.Context, podflag string, enforceSinglePod bool, ns string) (string, string, error) {
	if enforceSinglePod {
		pods, podNamespace, err := ctx.InferPodsFromTypedResource(podflag, ns)
		if err != nil {
			return "", "", err
		}
		if len(pods) != 1 {
			return "", "", fmt.Errorf("ztunnel pod name or --node must be set")

View on GitHub (pinned to 8dc789c5cf)

When it happens

Trigger: Thrown at istioctl/pkg/ztunnelconfig/ztunnelconfig.go:533 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of istio/istio@8dc789c5cf (2026-08-15). Data as JSON: /api/errors/a50a9dc4667917fa. Report an issue: GitHub.