Sourced from google.golang.org/grpc's releases.

Release 1.73.0

New Features

• balancer/ringhash: move LB policy from xds/internal to exported path to facilitate use without xds (#8249)
• xds: enable least request LB policy by default. It can be disabled by setting GRPC_EXPERIMENTAL_ENABLE_LEAST_REQUEST=false in your environment. (#8253)
• grpc: add a CallAuthority Call Option that can be used to overwrite the http :authority header on per-RPC basis. (#8068)
• stats/opentelemetry: add trace event for name resolution delay. (#8074)
• health: added List method to gRPC Health service. (#8155)
  • Special Thanks: @​marcoshuck
• ringhash: implement features from gRFC A76. (#8159)
• xds: add functionality to support SPIFFE Bundle Maps as roots of trust in XDS which can be enabled by setting GRPC_EXPERIMENTAL_XDS_MTLS_SPIFFE=true. (#8167, #8180, #8229, #8343)

Bug Fixes

• xds: locality ID metric label is changed to make it consistent with gRFC A78. (#8256)
• client: fail RPCs on the client when using extremely short contexts that expire before the grpc-timeout header is created. (#8312)
• server: non-positive grpc-timeout header values are now rejected. This is consistent with the gRPC protocol spec. (#8290)
  • Special Thanks: @​evanj
• xds: fix reported error string when LRS load reporting interval is invalid. (#8224)
  • Special Thanks: @​alingse

Performance Improvements

• credentials/alts: improve read performance by optimizing buffer copies and allocations. (#8271)
• server: improve performance of RPC handling by avoid a status proto copy (#8282)
  • Special Thanks: @​evanj

Documentation

• examples/features/opentelemetry: modify example to demonstrate tracing using OpenTelemtry plugin. (#8056)

Release 1.72.2

Bug Fixes

• client: restore support for NO_PROXY environment variable when connecting to locally-resolved addresses (case 2 from gRFC A1). (#8329)
• balancer/least_request: fix panic on resolver errors. (#8333)

• c52d025 Change version to 1.73.0 (#8322)
• ac60db1 Add flag guarding SPIFFE Bundle provider (#8343) (#8382)
• 183c148 balancer/ringhash: Add experimental notice in package comment (#8364) (#8365)
• b610465 delegatingresolver: avoid proxy for resolved addresses in NO_PROXY env (#8329...
• 96c4308 balancer/least_request : Fix panic while handling resolver errors (#8333) (#8...
• af5146b grpc: update contributing.md (#8318)
• 09166b6 cleanup: remove unused constants in generic xdsclient (#8315)
• e3f13e7 transport: Prevent sending negative timeouts (#8312)
• b89909b leakcheck: Fix flaky test TestCheck (#8309)
• 709023d grpcsync/event: Simplify synchronization (#8308)
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