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Ran 21 Feb 2020 11:43PM UTC

Files 267

Run time 29s

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Committed 21 Feb 2020 11:32PM UTC coverage: 87.136% (-0.01%) from 87.147%

Job # 17264.1

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push

travis-ci

Committed by

web-flow

Commit Message

xds: update LRS protocol and fix usage of cluster name in ClusterStats (#6737)

Fixes load reporting integration due to LRS design flaws.

- Updated LRS protocol. The Node sent in LRS requests use a special metadata "PROXYLESS_CLIENT_HOSTNAME" with value being the hostname (including port) for creating the gRPC channel. Management server is able to infer clusters that the gRPC client potentially sends load to. LRS initial request does not need to populate clusters it wants to report load for.

- Each ClusterStats message in LRS requests represents the loads for each (cluster, cluster_service), where cluster_service field is optional. EDS LB policy should track loads per (cluster, cluster_service) and populate cluster name from upstream CDS policy.

- Modified CdsUpdate, which is the converted data of a CDS response. edsServiceName field can be null when an CDS response does not give it. We want to preserve the null value for LRS requests.

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