ahmetb/kubectx · error

kubeconfig error: %w

Error message

kubeconfig error: %w

What it means

CurrentOp.Run loads the kubeconfig file via kubeconfig.DefaultLoader and calls kc.Parse(). Any failure reading or parsing the kubeconfig YAML (missing file, malformed YAML, invalid structure) is wrapped as "kubeconfig error: %w". kubens cannot determine the current namespace without a valid kubeconfig.

Source

Thrown at cmd/kubens/current.go:31

// limitations under the License.

package main

import (
	"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. Check that the file named by $KUBECONFIG (default ~/.kube/config) exists and is readable
2. Run `kubectl config view` to see whether kubectl can parse the same file
3. Fix YAML syntax errors in the kubeconfig (tabs, bad indentation)
4. Run `kubectl config set-context` / re-copy credentials to regenerate a valid kubeconfig

Example fix

// before
export KUBECONFIG=~/.kube/confg   // typo, file missing
// after
export KUBECONFIG=~/.kube/config

kcPath := os.Getenv("KUBECONFIG")
if kcPath == "" {
    kcPath = filepath.Join(os.Getenv("HOME"), ".kube", "config")
}
if _, err := os.Stat(kcPath); err != nil {
    return fmt.Errorf("kubeconfig missing: %w", err)
}

op := kubens.CurrentOp{}
if err := op.Run(stdout, stderr); err != nil {
    if strings.Contains(err.Error(), "kubeconfig error:") {
        // run `kubectl config view` to diagnose, then fix or regenerate the file
    }
    return err
}

When it happens

Trigger: kc.Parse() returns an error because KUBECONFIG points to a nonexistent, unreadable, or malformed file, or the YAML does not match the kubeconfig schema.

Common situations: KUBECONFIG env var set to a wrong path; first run before any cluster has been configured (no ~/.kube/config); a partially-written or hand-edited config with YAML syntax errors.

Related errors

• kubeconfig error: %w
• failed to get current context: %w
• failed to read namespace of "%s": %w
• failed to switch namespace: %w
• failed to close encoder for file %d: %w

AI-assisted analysis of ahmetb/kubectx@12ad6fb22e (2026-09-02). Data as JSON: /api/errors/fd9c28aef96842a4. Report an issue: GitHub.