kubernetes/kops · error

error starting challenge listener: %w

Error message

error starting challenge listener: %w

What it means

Error "error starting challenge listener: %w" thrown in kubernetes/kops.

Source

Thrown at upup/pkg/fi/nodeup/nodetasks/bootstrap_client.go:95

	req := nodeup.BootstrapRequest{
		APIVersion: nodeup.BootstrapAPIVersion,
		Certs:      map[string]string{},
		KeypairIDs: b.KeypairIDs,
	}

	var challengeServer *bootstrap.ChallengeServer
	if b.UseChallengeCallback {
		s, err := bootstrap.NewChallengeServer(b.ClusterName, b.Client.CAs)
		if err != nil {
			return err
		}
		challengeServer = s
		listen := ":" + strconv.Itoa(wellknownports.NodeupChallenge)

		listener, err := challengeServer.NewListener(ctx, listen)
		if err != nil {
			return fmt.Errorf("error starting challenge listener: %w", err)
		}
		defer listener.Stop()

		req.Challenge = listener.CreateChallenge()
	}

	if b.keys == nil {
		b.keys = map[string]*pki.PrivateKey{}
	}

	for name, certRequest := range b.Certs {
		key, ok := b.keys[name]
		if !ok {
			var err error
			key, err = pki.GeneratePrivateKey()
			if err != nil {
				return fmt.Errorf("generating private key: %v", err)
			}

View on GitHub (pinned to 4c8573c808)

When it happens

Trigger: Thrown at upup/pkg/fi/nodeup/nodetasks/bootstrap_client.go:95 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/c9220d26cd335597. Report an issue: GitHub.