kubernetes/kops · error

error listing RouteTables: %v

Error message

error listing RouteTables: %v

What it means

RouteTableAssociation.Find looks up the route table by ID via DescribeRouteTables to locate an existing association for a subnet. API errors are wrapped with this message; an empty result correctly returns nil, nil.

Source

Thrown at upup/pkg/fi/cloudup/awstasks/routetableassociation.go:64

func (e *RouteTableAssociation) Find(c *fi.CloudupContext) (*RouteTableAssociation, error) {
	ctx := c.Context()
	cloud := awsup.GetCloud(c)

	routeTableID := e.RouteTable.ID
	subnetID := e.Subnet.ID

	if routeTableID == nil || subnetID == nil {
		return nil, nil
	}

	request := &ec2.DescribeRouteTablesInput{
		RouteTableIds: []string{fi.ValueOf(routeTableID)},
	}

	response, err := cloud.EC2().DescribeRouteTables(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("error listing RouteTables: %v", err)
	}
	if response == nil || len(response.RouteTables) == 0 {
		return nil, nil
	}

	if len(response.RouteTables) != 1 {
		return nil, fmt.Errorf("found multiple RouteTables matching tags")
	}
	rt := response.RouteTables[0]
	for _, rta := range rt.Associations {
		if aws.ToString(rta.SubnetId) != *subnetID {
			continue
		}
		actual := &RouteTableAssociation{
			Name:       e.Name,
			ID:         rta.RouteTableAssociationId,
			RouteTable: &RouteTable{ID: rta.RouteTableId},
			Subnet:     &Subnet{ID: rta.SubnetId},

View on GitHub (pinned to 4c8573c808)

Solutions

1. Verify the route table ID exists via AWS CLI describe-route-tables
2. Check IAM permissions for ec2:DescribeRouteTables
3. Re-run the reconcile after transient AWS failures
4. Inspect the wrapped AWS error code to target the actual cause

aws ec2 describe-route-tables --route-table-ids rtb-123 || echo "table gone"

var aerr smithy.APIError
if errors.As(err, &aerr) && (aerr.ErrorCode() == "ThrottlingException" || aerr.ErrorCode() == "RequestLimitExceeded") {
  backoffAndRetry()
}

When it happens

Trigger: DescribeRouteTables by route table ID errors during Find: invalid/deleted table ID, IAM missing ec2:DescribeRouteTables, throttling, or connectivity issues.

Common situations: Route table removed out-of-band; CI environment with insufficient IAM; throttled accounts during large reconciles; stale kOps cluster state.

Related errors

• describing instance for arn %q
• error terminating instances: %v
• error describing instances: %v
• error describing addresses: %v
• error describing volumes: %v

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/117bc450086f926b. Report an issue: GitHub.