destination: Index pods and service with multiple IPs #11515
Merged
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The destination controller indexes Pods by their primary PodIP and their primary HostIP (when applicable); and it indexes Services by their primaryy ClusterIP.
In preparation for dual-stack (IPv6) support, this change updates the destination controller indexers to consume all IPs for these resources. Tests are updated to demonstrate a dual-stack setup (where these resources have a primary IPv4 address and a secondary IPv6 address).
While exercising these tests, I had to replace the brittle host:port parsing logic we use in the server, in favor of Go's standard
net.SplitHostPort
utility.