kubernetes/kops · error

error storing keypair: %w

Error message

error storing keypair: %w

What it means

After clearing DistrustTimestamp on a keypair item, `kops trust keypair` persists the whole keyset via StoreKeyset. If the underlying key store (S3, GCS, etcd-backed, filesystem, etc.) fails to write, the error is wrapped as `error storing keypair: %w`. The trust operation failed to persist and the keyset in the store is unchanged or in an unknown state.

Source

Thrown at cmd/kops/trust_keypair.go:132

	}
	if keyset == nil {
		return fmt.Errorf("keyset %q not found", options.Keyset)
	}

	for _, id := range options.KeypairIDs {
		item := keyset.Items[id]
		if item == nil {
			return fmt.Errorf("keypair not found")
		}

		if item.DistrustTimestamp == nil {
			continue
		}

		item.DistrustTimestamp = nil

		if err := keyStore.StoreKeyset(ctx, options.Keyset, keyset); err != nil {
			return fmt.Errorf("error storing keypair: %w", err)
		}

		fmt.Fprintf(out, "Trusted %s %s\n", options.Keyset, id)
	}

	return nil
}

func completeTrustKeyset(ctx context.Context, f commandutils.Factory, options *TrustKeypairOptions, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
	commandutils.ConfigureKlogForCompletion()

	cluster, clientSet, completions, directive := GetClusterForCompletion(ctx, f, nil)
	if cluster == nil {
		return completions, directive
	}

	keyset, _, completions, directive := completeKeyset(ctx, cluster, clientSet, args, func(name string, keyset *fi.Keyset) bool {
		if name == "all" {

View on GitHub (pinned to 4c8573c808)

Solutions

1. Read the wrapped %w cause to identify the backend error and fix credentials/permissions or connectivity for the state store
2. Retry `kops trust keypair` after backend access is restored
3. Verify backend health directly (e.g. `kops get clusters`, aws s3 ls / etcdctl) before retrying
4. Check no conflicting concurrent kops write is holding a lock on the cluster state

Example fix

// before
export AWS_PROFILE=wrong-profile
kops trust keypair --name c.k8s.local ca 20210101000000
// after
export AWS_PROFILE=ops-admin   # profile with state-store write access
kops trust keypair --name c.k8s.local ca 20210101000000

if err := store.HealthCheck(ctx); err != nil { // e.g. test-list the bucket/etcd
	return fmt.Errorf("key store unavailable before trust: %w", err)
}

err := keyStore.StoreKeyset(ctx, name, keyset)
var retriable = errors.Is(err, context.DeadlineExceeded) || isBackendUnavailable(err)
if err != nil {
	if retriable {
		// backoff and retry the whole TrustKeypair operation
	} else {
		// fix credentials/IAM or read-only backend, then retry manually
	}
	return fmt.Errorf("error storing keypair: %w", err)
}

When it happens

Trigger: StoreKeyset returns an error: backend connectivity failure (S3/GCS/etcd unreachable or permission denied), the key store is read-only (e.g. vacuumed/published keysets in a read-only registry backend), concurrent modification conflicts, or the backend rejects the write due to validation.

Common situations: Expired or missing cloud credentials; IAM policy lacking PutObject on the state-store bucket; etcd key store unavailable during control-plane maintenance; network outage in CI; state store bucket write-protected.

Related errors

• writing keyset: %v
• error populating configuration: %v
• error writing updated configuration: %v
• --region is required (when --external)
• getting keystore: %v

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/6420f8978b5f4b00. Report an issue: GitHub.