ahmetb/kubectx · error

failed to get current context: %w

Error message

failed to get current context: %w

What it means

switchNamespace calls kc.GetCurrentContext() to read the current-context field of the active kubeconfig before performing a namespace switch. This error wraps any failure from that read — typically the kubeconfig file cannot be read or parsed at the moment of the call. It is thrown by kubens's switchNamespace (cmd/kubens/switch.go:54), invoked by SwitchOp.Run.

Source

Thrown at cmd/kubens/switch.go:54

func (s SwitchOp) Run(_, stderr io.Writer) error {
	kc := new(kubeconfig.Kubeconfig).WithLoader(kubeconfig.DefaultLoader)
	defer kc.Close()
	if err := kc.Parse(); err != nil {
		return fmt.Errorf("kubeconfig error: %w", err)
	}

	toNS, err := switchNamespace(kc, s.Target, s.Force)
	if err != nil {
		return err
	}
	err = printer.Success(stderr, "Active namespace is \"%s\"", printer.SuccessColor.Sprint(toNS))
	return err
}

func switchNamespace(kc *kubeconfig.Kubeconfig, ns string, force bool) (string, error) {
	ctx, err := kc.GetCurrentContext()
	if err != nil {
		return "", fmt.Errorf("failed to get current context: %w", err)
	}
	if ctx == "" {
		return "", errors.New("current-context is not set")
	}
	curNS, err := kc.NamespaceOfContext(ctx)
	if err != nil {
		return "", fmt.Errorf("failed to get current namespace: %w", err)
	}

	f := NewNSFile(ctx)
	prev, err := f.Load()
	if err != nil {
		return "", fmt.Errorf("failed to load previous namespace from file: %w", err)
	}

	if ns == "-" {
		if prev == "" {
			return "", fmt.Errorf("No previous namespace found for current context (%s)", ctx)

View on GitHub (pinned to 12ad6fb22e)

Solutions

1. Check the kubeconfig file exists and is readable: echo $KUBECONFIG; ls -l ~/.kube/config
2. Validate the kubeconfig parses: kubectl config current-context — fix YAML syntax errors it reports
3. If no config exists, generate one (kubectl cluster-info after cluster setup, or copy the cluster's kubeconfig to ~/.kube/config)
4. Fix file permissions: chmod 600 ~/.kube/config and ensure you own it

Example fix

// before
export KUBECONFIG=~/.kube/confog   # typo: file does not exist
// after
export KUBECONFIG=~/.kube/config

cfgPath := os.Getenv("KUBECONFIG");
if cfgPath == "" { cfgPath = filepath.Join(os.Getenv("HOME"), ".kube", "config") }
if fi, err := os.Stat(cfgPath); err != nil || fi.IsDir() {
    return fmt.Errorf("kubeconfig %s missing or unreadable", cfgPath)
}

if _, err := kc.GetCurrentContext(); err != nil {
    var perr *os.PathError
    if errors.As(err, &perr) { /* advise fixing KUBECONFIG/permissions */ }
    return err
}

When it happens

Trigger: kc.GetCurrentContext() returns a non-nil error because the kubeconfig path (KUBECONFIG or ~/.kube/config) is missing, unreadable (permissions), malformed YAML, or the loader fails to resolve the file.

Common situations: KUBECONFIG env var points to a nonexistent file; ~/.kube/config has wrong ownership/permissions (e.g. mounted by root in a container); a corrupted or truncated kubeconfig after an interrupted write; running kubens before ever running kubectl (no config file exists).

Related errors

• failed to get current namespace: %w
• failed to change to namespace "%s": %w
• kubeconfig error: %w
• failed to get current context: %w
• failed to read namespace of "%s": %w

AI-assisted analysis of ahmetb/kubectx@12ad6fb22e (2026-09-02). Data as JSON: /api/errors/f378a98d1ef1178e. Report an issue: GitHub.