ahmetb/kubectx · error

"contexts" entry is nil

Error message

"contexts" entry is nil

What it means

Sentinel error in contextsNodeOf: the kyaml Pipe(yaml.Get("contexts")) returned a nil node, meaning the kubeconfig YAML has no top-level 'contexts' field at all (or it is null). Callers like DeleteContextEntry and contextNodeWithFileIndex cannot proceed without that list.

Source

Thrown at internal/kubeconfig/contexts.go:31

// limitations under the License.

package kubeconfig

import (
	"errors"
	"fmt"
	"slices"

	"sigs.k8s.io/kustomize/kyaml/yaml"
)

func contextsNodeOf(fe *fileEntry) (*yaml.RNode, error) {
	contexts, err := fe.config.Pipe(yaml.Get("contexts"))
	if err != nil {
		return nil, err
	}
	if contexts == nil {
		return nil, errors.New("\"contexts\" entry is nil")
	} else if contexts.YNode().Kind != yaml.SequenceNode {
		return nil, errors.New("\"contexts\" is not a sequence node")
	}
	return contexts, nil
}

// contextNodeWithFileIndex searches for a context by name across all files.
// Returns the context node and the index of the file that contains it.
// Files without a valid "contexts" sequence are skipped, but if errors occur
// during lookup they are included in the final error message.
func (k *Kubeconfig) contextNodeWithFileIndex(name string) (*yaml.RNode, int, error) {
	var fileErrors []error
	for i := range k.files {
		contexts, err := contextsNodeOf(&k.files[i])
		if err != nil {
			fileErrors = append(fileErrors, fmt.Errorf("file %d: %w", i, err))
			continue
		}

View on GitHub (pinned to 12ad6fb22e)

Solutions

1. Add a 'contexts' section to the kubeconfig or create one via `kubectl config set-context`
2. Validate the file with `kubectl config view` to see the parsed structure

When it happens

Trigger: Thrown at internal/kubeconfig/contexts.go:31 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/ce77e4ff6c480707. Report an issue: GitHub.