User Story

As a user I want to configure my nodes to support IPv6 so that I can eventually deprecate IPv4 traffic.

Background

OCPCLOUD-3215 will implement configuration allowing IPv4 and IPv6 traffic to reach the incoming side of a network load balancer. Users must also be able to inform the CCM that they would like their nodes to listen on IPv6 traffic by configuring IPv6 target group listeners.

Steps

• Add support for the annotation service.beta.kubernetes.io/target-group-ip-address-type to the network load balancer implementation.

• • Valid values are "ipv4" (default) and "ipv6"
  • IPv6 must only be allowed when service.beta.kubernetes.io/aws-load-balancer-ip-address-type is set, otherwise assume IPv4.
• Default upstream will be IPv4, however the Openshift Installer will use this to set nodes to IPv6 in dual stack deployments.
• Ignore this annotation if the Service.spec.loadBalancerClass field is set.

Stakeholders

• <Who is interested in this/where did they request this>

Definition of Done

• An IPv6 target group for nodes can be created and attached to a dual stack network load balancer automatically.

• Docs

• Document the {{service.beta.kubernetes.io/target-group-ip-address-type }}annotation and valid values

• Testing

• Ensure that IPv6 traffic can flow into a dual network load balancer and that target nodes are configured with IPv6 as well.