ahmetb/kubectx · error

failed to get current context: %w

Error message

failed to get current context: %w

What it means

After successfully parsing the kubeconfig, CurrentOp.Run calls kc.GetCurrentContext() to read the current-context field. If the kubeconfig library cannot resolve the current context (internal lookup/decode failure), the error is wrapped as "failed to get current context: %w". Note the related but distinct case where current-context is merely empty, which returns "current-context is not set" instead.

Source

Thrown at cmd/kubens/current.go:36

	"errors"
	"fmt"
	"io"

	"github.com/ahmetb/kubectx/internal/kubeconfig"
)

type CurrentOp struct{}

func (c CurrentOp) Run(stdout, _ 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)
	}

	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")
	}
	ns, err := kc.NamespaceOfContext(ctx)
	if err != nil {
		return fmt.Errorf("failed to read namespace of \"%s\": %w", ctx, err)
	}
	_, err = fmt.Fprintln(stdout, ns)
	if err != nil {
		return fmt.Errorf("write error: %w", err)
	}
	return nil
}

View on GitHub (pinned to 12ad6fb22e)

Solutions

1. Set a valid current context: `kubectl config use-context <name>`
2. List available contexts with `kubectl config get-contexts` and verify current-context matches one of them
3. Remove duplicate/merged KUBECONFIG entries that conflict (unset KUBECONFIG or fix the merge order)
4. Regenerate the kubeconfig from your cluster provider if it is corrupted

Example fix

// before
# ~/.kube/config
current-context: prod-cluster   # context not defined in contexts:
// after
kubectl config use-context prod-cluster   # ensures context exists and is current

out, err := exec.Command("kubectl", "config", "current-context").Output()
if err != nil || len(strings.TrimSpace(string(out))) == 0 {
    return errors.New("no current context set; run kubectl config use-context <name>")
}

if err := op.Run(stdout, stderr); err != nil {
    if strings.Contains(err.Error(), "failed to get current context") {
        // fix with: kubectl config use-context <existing-context>
    }
    return err
}

When it happens

Trigger: kc.GetCurrentContext() returns an error while reading the current-context entry from the parsed kubeconfig, typically due to a structurally valid file whose current-context reference is broken or the file cannot be re-read.

Common situations: A kubeconfig whose current-context points at a context missing from the contexts list; corrupted config edited by hand; KUBECONFIG merging issues producing inconsistent files.

Related errors

• kubeconfig error: %w
• failed to read namespace of "%s": %w
• kubeconfig error: %w
• failed to switch namespace: %w
• failed to create transport: %w

AI-assisted analysis of ahmetb/kubectx@12ad6fb22e (2026-09-02). Data as JSON: /api/errors/53fab3af816b7dee. Report an issue: GitHub.