Release 1.57.0

API Changes

• resolver: remove deprecated Target.Scheme and Target.Authority. Use URL.Scheme and URL.Host instead, respectively (#6363)

Behavior Changes

• client: percent-encode the default authority for the channel (#6428)
• xds: require EDS service name to be set in a CDS cluster with an 'xdstp' resource name (gRFC A47) (#6438)

New Features

• reflection: support the v1 reflection service and update Register to register both v1alpha and v1 (#6329)
• xds: add support for string matcher in RBAC header matching (#6419)
• alts: add support for GRPC_ALTS_MAX_CONCURRENT_HANDSHAKES env var (#6267)
• balancer/weightedroundrobin: de-experimentalize name of LB policy (#6477)

Bug Fixes

• status: status.FromError now returns an error with codes.Unknown when the error implements the GRPCStatus() method, and calling GRPCStatus() returns nil (#6374)
  • Special Thanks: @atollena
• server: fix bug preventing TCP user timeout from being set on the connection when TLS is used (#6321)
  • Special Thanks: @tobotg
• client: eliminate connection churn during an address update that differs only in balancer attributes (#6439)
• clusterresolver: handle EDS nacks, resource-not-found errors, and DNS Resolver errors correctly (#6436, #6461)
• xds/ringhash: cache connectivity state of subchannels inside picker to avoid rare races (#6351)

Release 1.56.2

• status: To fix a panic, status.FromError now returns an error with codes.Unknown when the error implements the GRPCStatus() method, and calling GRPCStatus() returns nil. (#6374)

Release 1.55.1

• status: To fix a panic, status.FromError now returns an error with codes.Unknown when the error implements the GRPCStatus() method, and calling GRPCStatus() returns nil. (#6374)

Release 1.56.1

• client: handle empty address lists correctly in addrConn.updateAddrs

Release 1.56.0

New Features

• client: support channel idleness using WithIdleTimeout dial option (#6263)
  • This feature is currently disabled by default, but will be enabled with a 30 minute default in the future.
• client: when using pickfirst, keep channel state in TRANSIENT_FAILURE until it becomes READY (gRFC A62) (#6306)
• xds: Add support for Custom LB Policies (gRFC A52) (#6224)
• xds: support pick_first Custom LB policy (gRFC A62) (#6314) (#6317)
• client: add support for pickfirst address shuffling (gRFC A62) (#6311)
• xds: Add support for String Matcher Header Matcher in RDS (#6313)
• xds/outlierdetection: Add Channelz Logger to Outlier Detection LB (#6145)
  • Special Thanks: @s-matyukevich
• xds: enable RLS in xDS by default (#6343)
• orca: add support for application_utilization field and missing range checks on several metrics setters
• balancer/weightedroundrobin: add new LB policy for balancing between backends based on their load reports (gRFC A58) (#6241)
• authz: add conversion of json to RBAC Audit Logging config (#6192)
• authz: add support for stdout logger (#6230 and #6298)
• authz: support customizable audit functionality for authorization policy (#6192 #6230 #6298 #6158 #6304 and #6225)

Bug Fixes

• orca: fix a race at startup of out-of-band metric subscriptions that would cause the report interval to request 0 (#6245)
• xds/xdsresource: Fix Outlier Detection Config Handling and correctly set xDS Defaults (#6361)
• xds/outlierdetection: Fix Outlier Detection Config Handling by setting defaults in ParseConfig() (#6361)

API Changes

• orca: allow a ServerMetricsProvider to be passed to the ORCA service and ServerOption (#6223)

Release 1.54.1

Bug Fixes

• credentials/alts: revert a change that causes a crash in the handshaker

Release 1.55.0

Behavior Changes

• xds: enable federation support by default (#6151)
• status: status.Code and status.FromError handle wrapped errors (#6031 and #6150)
  • Special Thanks: @psyhatter

New Features

• xds/xdsclient: support ignore_resource_deletion server feature as per gRFC A53 (#6035)
• security/advancedtls: add min/max TLS version selection options (#6007)
  • Special Thanks: @joeljeske

Bug Fixes

• xds: stop routing RPCs to deleted clusters (#6125)
• client: fix race between stream creation and GOAWAY receipt, which could lead to spurious UNAVAILABLE stream errors (#6142)

Performance Improvements

• server: improve stream handler goroutine worker allocation when NumStreamWorkers is used (#6004)
  • Special Thanks: @SaveTheRbtz

GCP Observability v1.0.0

The observability module provides GCP users with a simple way to export RPC logging, tracing, and metrics to Google Cloud Operations. This is the first (GA) release of this module. For more information, please see this blog post.

OpenCensus v1.0.0

This module adds support for instrumenting gRPC with OpenCensus tracing and metrics. It does so through a Dial Option and a Server Option users can attach to their created Channels and Servers.

Release 1.54.0

Behavior Changes

• xds: remove support for xDS v2 transport API (#6013)

New Features

• server: expose SetSendCompressor API to set send compressor name (#5744)
  • Special Thanks: @jronak
• xdsclient: include Node proto only in the first discovery request message, to improve performance (#6078)

Bug Fixes

• metadata: fix validation logic and properly validate metadata appended via AppendToOutgoingContext (#6001)
  • Special Thanks: @ktalg
• transport: do not close connections when we encounter I/O errors until after all data is consumed (#6110)
• ringhash: ensure addresses are consistently hashed across updates (#6066)
• xds/clusterimpl: fix a bug causing unnecessary closing and re-opening of LRS streams (#6112)
• xds: NACK route configuration if sum of weights of weighted clusters exceeds uint32_max (#6085)

Documentation

• resolver: update Resolver.Scheme() docstring to mention requirement of lowercase scheme names (#6014)
• resolver: document expected error handling of UpdateState errors (#6002)
  • Special Thanks: @fho
• examples: add example for ORCA load reporting (#6114)
• examples: add an example to illustrate authorization (authz) support (#5920)
  • Special Thanks: @KenxinKun