DescribeInternetGatewaysIgnoreTags returns all ec2.InternetGateways, ignoring tags (gateways were not always tagged in kube-up).

DescribeRouteTables lists route-tables tagged for the cluster (shared and owned).

DescribeRouteTablesIgnoreTags returns all ec2.RouteTable, ignoring tags.

FindAutoscalingLaunchConfiguration finds an AWS launch configuration given its name.

HasOwnedTag looks for the new tag indicating that the cluster does owns the resource, or the legacy tag.

HasSharedTag looks for the shared tag indicating that the cluster does not own the resource.

For NLBs and ALBs.