Support full Service API

[howardjohn]

If we are going to be a drop in we need to support the full featuteset of Service. This includes the locality aware stuff, affinity, etc.

Depends on https://github.com/istio/ztunnel/issues/152. This should have a proper design before any implementation

[hzxuzhonghu]

cc

[howardjohn]

internalTrafficPolicy: done https://github.com/istio/ztunnel/pull/868 clusterIP, ports: done sessionAffinity: https://github.com/istio/ztunnel/issues/450, TODO externalName: nothing needed externalIPs: I think nothing needed?

So we are in pretty good shape. sessionAffinity is rarely used so I don't mind putting that off for a while

[daixiang0]

I want to implement serviceAffinity if possible.

My design is like what the k8s does as https://kubernetes.io/docs/reference/networking/virtual-ips/#session-affinity.

• Add 2 mode:

  • None
  • ClientIP

• Add seesion timeout.

• Only work without waypoint enabled.

[howardjohn]

Do you have a strong use case for this? I worry the complexity of this outweighs the benefits, at least for the next 6 months or so while we are working on stabilizing core

[howardjohn]

AFAIK the only remaining is https://github.com/istio/ztunnel/issues/450