Set zone from EndpointSlice for xDS Endpoint

[aoledk]

Description:

xDS Endpoint's zone will be needed as first step when user wants to apply priority levels or zone aware routing for cluster's load balancing to reduce cost.

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#1909 (comment)

[aoledk]

/assign

[arkodg]

hey @aoledk thanks for driving this work,
before we implement this, we as a community need to align on what the feature is, is it

• Auto Zone Aware Routing where a user sets a global field to enable this, and envoy proxy prioritizes endpoints in the same zone based on its zone ?
  Open Questions:
  • is this granular enough ? there are only 2 levels here - local or not local
• Priorites for BackendRefs - Prioritizes one backendRef over another backendRef within the same HTTP Rule

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days.