kep-1669: add GA graduation criterias for v1.27

Signed-off-by: Andrew Sy Kim <[email protected]>

Author: andrewsykim

keps/prod-readiness/sig-network/1669.yaml

@@ -3,3 +3,5 @@ alpha:
   approver: "@wojtek-t"
 beta:
   approver: "@wojtek-t"
+stable:
+  approver: "@wojtek-t"

keps/sig-network/1669-proxy-terminating-endpoints/README.md

@@ -26,6 +26,7 @@
   - [Graduation Criteria](#graduation-criteria)
     - [Alpha](#alpha)
     - [Beta](#beta)
+    - [GA](#ga)
   - [Upgrade / Downgrade Strategy](#upgrade--downgrade-strategy)
   - [Version Skew Strategy](#version-skew-strategy)
 - [Production Readiness Review Questionnaire](#production-readiness-review-questionnaire)
@@ -190,6 +191,7 @@ and internalTrafficPolicy.
 - E2E test validating fallback behavior for terminating endpoints when `externalTrafficPolicy: Local`: https://github.com/kubernetes/kubernetes/blob/4bc1398c0834a63370952702eef24d5e74c736f6/test/e2e/network/service.go#L3145
 - E2E test validating fallback behaviro for terminating endpoints when `internalTrafficPolicy: Cluster`: https://github.com/kubernetes/kubernetes/blob/4bc1398c0834a63370952702eef24d5e74c736f6/test/e2e/network/service.go#L2889
 - E2E test validating fallback behaviro for terminating endpoints when `internalTrafficPolicy: Local`: https://github.com/kubernetes/kubernetes/blob/4bc1398c0834a63370952702eef24d5e74c736f6/test/e2e/network/service.go#L2972
+- E2E test performing rolling update with an LB using `externalTrafficiPolicy: Local`: https://github.com/kubernetes/kubernetes/blob/f333e5b4c5a174c63ac8e71f2c187f434ce56b1b/test/e2e/network/loadbalancer.go#L1283-L1299
 
 ### Graduation Criteria
 
@@ -206,6 +208,11 @@ and internalTrafficPolicy.
 * Metrics to publish how many Services/Endpoints are routing traffic to terminating endpoints.
 * Manual or automated rollback testing (see [Test Plan](#test-plan) section)
 
+#### GA
+
+* Feedback from users in issue [85643](https://github.com/kubernetes/kubernetes/issues/85643) that enabling ProxyTerminatingEndpoints can achieve zero downtime rolling updates when using `externalTrafficPolicy: Local`
+* E2E tests demonstrating that rolling updates can be performed with negligible downtime (ideally 100%, but may not feasible without flakiness) with a Service LoadBalancer when using externalTrafficPolicy: Local
+
 ### Upgrade / Downgrade Strategy
 
 Behavioral changes to terminating endpoints will apply when the feature gate is enabled. It is required that the cluster has the EndpointSlice API enabled and

keps/sig-network/1669-proxy-terminating-endpoints/kep.yaml

@@ -12,24 +12,25 @@ reviewers:
 approvers:
   - "@thockin"
 creation-date: 2020-04-07
-last-updated: 2022-01-21
+last-updated: 2023-02-02
 status: implementable
 see-also:
   - "/keps/sig-network/1672-tracking-terminating-endpoints/README.md"
   - https://github.com/kubernetes/kubernetes/issues/85643
 
 # The target maturity stage in the current dev cycle for this KEP.
-stage: beta
+stage: stable
 
 # The most recent milestone for which work toward delivery of this KEP has been
 # done. This can be the current (upcoming) milestone, if it is being actively
 # worked on.
-latest-milestone: "v1.26"
+latest-milestone: "v1.27"
 
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.22"
   beta: "v1.26"
+  stable: "v1.27"
 
 # The following PRR answers are required at alpha release
 # List the feature gate name and the components for which it must be enabled