NATS - v2.10.0

Changelog

Go Version

• 1.21.1

Dependencies

• github.com/nats-io/nats.go v1.29.0
• github.com/nats-io/jwt/v2 v2.5.2
• github.com/nats-io/nkeys v0.4.5
• github.com/klauspost/compress v1.17.0
• golang.org/x/crypto v0.13.0

Added

Accounts
- Add $SYS.REQ.USER.INFO NATS endpoint for user info (#3671)

Auth
- Authorization callout extension for delegating to external auth providers (#3719, #3784, #3799, #3864, #3987, #4501, #4544)

Builds
- Add early build support for NetBSD (#3526) Thanks to @MatthiasPetermann for the contribution!
- Add early build support for IBM z/OS (#4209) Thanks to @v1gnesh for the contribution!

Cluster
- Multiple routes and ability to have per-account routes to reduce head-of-line blocking in clustered setups (#4001, #4183, #4414)
- Support for S2 compression of traffic over route connections (#4115, #4137)

Config
- Reload server config by sending a message in the system account to $SYS.REQ.SERVER.{server-id}.RELOAD (#4307)

Embedded
- Add ConnectionDeadline field to User to force server disconnect after deadline (#3580, #3674)

Leafnode
- Add TLSHandshakeFirst option to perform a TLS handshake before sending connection info (#4119)
- Support S2 compression of traffic over leafnode connections (#4167, #4230)
- Allow remotes from same server binding to same hub account (#4259)

Logging
- Add logfile_max_num server config field to auto-rotate files (#4548)

JetStream
- Add stream subject transforms (#3814, #3823, #3827, #4035, #4354, #4400, #4403, #4512)
- Add freeform metadata field to stream and consumer configs (#3797)
- Add support for consumers filtering on multiple subjects (#3500, #3865, #4008, #4129, #4188)
- Add original timestamp as header to republished message (#3933) Thanks to @amorey for the contribution!
- Allow republish for mirroring/sourcing streams (#4010)
- Add optional S2 stream compression for file store-backed streams (#4004, #4072)
- Add file store ability to re-encrypt with new encryption keys (#4296)
- Add embedded option to disable JetStream ASCII art at startup (#4261) Thanks to @renevo for the contribution!
- Add ability to configure first_seq when creating streams (#4322, #4345)
- Add sync_internal option to JetStream config (#4483)

Monitoring
- Add unique_tag field in /jsz and /varz endpoints (#3617)
- Add $SYS.REQ.SERVER.PING.IDZ NATS endpoint for basic server info (#3663)
- Add $SYS.REQ.SERVER.<id>.PROFILEZ NATS endpoint for requesting debugging profiles (#3774)
- Add subscription count to /statz endpoint (#3875)
- Add Raft query parameter to /jsz to include Raft group info (#3914)
- Add slow_consumer_stats to the /varz endpoint (#4330)

MQTT
- Add support for QoS2 exactly-once delivery (#4349, #4440)

Reload
- Match --signal PIDs with globular-style expression (#4370) Thanks to @jevolk for the contribution!

Subject Mapping
- Add ability to remove wildcard tokens in subject transforms (#4152)
- Allows cluster filtering in account subject mapping (#4175)

System Services
- Add $SYS.REQ.SERVER.<id>.KICK NATS endpoint to disconnect a client by id or by name from the target server (#4298)
- Add $SYS.REQ.SERVER.<id>.LDM NATS endpoint that sends a “lame duck mode” message to a client by id or name on the target server (#4298)

Windows
- Add NATS_STARTUP_DELAY env for configurable startup time (#3743) Thanks to @Alberic-Hardis for the contribution!

Improved

Leafnodes
- Add jitter to leafnode reconnections (#4398)

Logging
- Add account, stream and consumer name to consumer alignment cleanup warning (#3666) Thanks to @ch629 for the contribution!

JetStream
- Significant optimisations and reduced memory impact for replicated streams with a large number of interior deletes (common in large KVs), considerably reducing the amount of CPU and memory required to create stream snapshots and smoothing out publish latencies (#4070, #4071, #4075, #4284, #4520, #4553)
- Improve signaling mechanism for consumers to improve performance and reduce latency (#3706)
- Allow edit of Stream RePublish (#3811)
- Add batch completed status to pull consumers (#3822)
- Improve behavior of stream source consumer creation or config updates on leadership change (#4009)
- Record the stream and consumer info timestamps (#4133)
- Allow switching between limits and interest retention policies (#4361)
- Improve performance of deleting blocks (#4371)
- Update the way meta indexing is handled for filestore, significantly reducing time to recover streams at startup (#4450, #4481)
- Add self-healing mechanism to detect and delete orphaned Raft groups (#4510)
- Improve monitoring of consumers that need to be cleaned up (#4536)

MQTT
- Optimize retained messages by using KV semantics instead of holding retained messages in memory (#4199, #4228)
- Support for topics with . character (#4243) Thanks to @petedavis and @telemac for the reports!
- Set the RETAIN flag when delivering to new subscriptions and clear the flag in all other conditions (#4443)

Profiling
- Annotate CPU and goroutine profiles with additional asset information to assist with debugging (#4204)
- Remove unused block profile rate (#4402)

Subject Mapping
- Subject transform validation and error reporting (#4202)

Fixed

Accounts
- Fix data race when updating accounts (#4435, #4550, #4561) Thanks to @hspaay for the report!

Clients
- Check if client connection name was already set when storing it (#3824)

Leafnode
- Data race during validation and setup (#4194)

JetStream
- Check for invalid stream name in sources (#4222)
- Stream config update idempotency (#4292)
- Seqset encode bug that could cause bad stream state snapshots (#4348)
- Ensure stream assignment is set when checking replica count and updating retention (#4391)
- Hold lock when enforcing message limit on startup (#4469)
- Fix filestore data race on hash during snapshots (#4470)
- Use write lock for memory store filtered state (#4498)
- Fix data race on stream’s clustered filestore sequence (#4508)
- Fix possible panic when recalculating the first sequence of a subject (#4530) Thanks to @aldiesel for the report!
- Fix leaking timers in stream sources resulting in runaway CPU usage (#4532)
- Fix possible panic when consumer is not closed (#4541)
- Fix data race when accessing consumer assignment (#4547)
- Fix data race when changing stream retention policy (#4551)
- Fix data race when loading the next message in memory-based streams (#4552)
- Prevent forward proposals in consumers after scaling down a stream (#4556)

OSCP
- Fixed local issuer determination for OCSP Staple (#4355)

Routes
- Update LastActivity on connect for routes (#4415)

Complete Changes

https://github.com/nats-io/nats-server/compare/v2.9.22...v2.10.0