ahmetb/kubectx · error

failed to save kubeconfig: %w

Error message

failed to save kubeconfig: %w

What it means

kc.Save() failed to write the modified kubeconfig (with the new current-context) back to disk. The in-memory switch succeeded; persistence failed due to filesystem issues: permissions, read-only file/mount, or a Reset/truncate error on one of the files.

Source

Thrown at cmd/kubectx/switch.go:79

		return "", fmt.Errorf("kubeconfig error: %w", err)
	}

	prev, err := kc.GetCurrentContext()
	if err != nil {
		return "", fmt.Errorf("failed to get current context: %w", err)
	}
	exists, err := kc.ContextExists(name)
	if err != nil {
		return "", fmt.Errorf("failed to check context: %w", err)
	}
	if !exists {
		return "", fmt.Errorf("no context exists with the name: \"%s\"", name)
	}
	if err := kc.ModifyCurrentContext(name); err != nil {
		return "", err
	}
	if err := kc.Save(); err != nil {
		return "", fmt.Errorf("failed to save kubeconfig: %w", err)
	}

	if prev != name {
		if err := writeLastContext(prevCtxFile, prev); err != nil {
			return "", fmt.Errorf("failed to save previous context name: %w", err)
		}
	}
	return name, nil
}

// swapContext switches to previously switch context.
func swapContext() (string, error) {
	prevCtxFile, err := kubectxPrevCtxFile()
	if err != nil {
		return "", fmt.Errorf("failed to determine state file: %w", err)
	}
	prev, err := readLastContext(prevCtxFile)
	if err != nil {

View on GitHub (pinned to 12ad6fb22e)

Solutions

1. Check write permissions and ownership of every KUBECONFIG file (~/.kube/config)
2. Ensure no read-only mount or immutable attribute blocks writes
3. Free disk space if the filesystem is full

When it happens

Trigger: Thrown at cmd/kubectx/switch.go:79 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ahmetb/kubectx@12ad6fb22e (2026-09-02). Data as JSON: /api/errors/74af2cf1ebe1b603. Report an issue: GitHub.