This version add Grpc as the translating to replace HTTP between client and server.

Detail see:

Features

Add gRPC connection core feature to Nacos.

• [#3328][#3739][#3749][#3776]

Config module support gRPC.

• [#3334][#3344][#3357][#3808]

Naming module support gRPC.

• [#3343][#3352][#3373][#3407][#3425][#3788][#3795][#3809][#3825][#3849][#3860][#4345][#4363][#4369][#4603][#4608][#4636]

Nacos Client Support gRPC.

• [#3350][#3401][#3405]

Nacos gRPC Client support reconnection.

• [#3365][#3367][#3385][#3420]

Support push data by gRPC.

• [#3478][#3521]

Connection event notification for gRPC.

• [#3611]

Load balance for Connection.

• [#3630][#3751][#3752][#4217]

Support Auth for gRPC request.

• [#3693][#3821][#3970][#4675]

Support metadata operation for Naming module by Jraft.

• [#4204][#4260][#4279][#4354][#4367][#4733]

Support basic connection limit.

• [#4651][#4752]

Support healthy check.

• [#4728][#4750]

Support upgrading and downgrading.

• [#4810][#4845]

Enhancement

Async execute some time-consuming operation.

• [#4099][#4533][#4595][#4656]

Multiple language SDK.

• [#4464]

Metric

• [#4649]

Full support for registering custom instances.

• [#4828]

Support single push when subscriber first subscribe service.

• [#4998]

Support healthy protection by threshold.

• [#5054]

Refactor

Naming Client refactor network proxy.

• [#3386]

Refactor and adapt v1 openAPI.

• [#3864][#3881][#4112][#4151][#4154][#4376][#4438][#4441][#4461][#4492][#4578][#4832]

BugFix

[#4489] Fix can't query non-default-group problem for catalog API. [#4681] Fix config miss line break problem. [#4788] Fix client id judgement error for ipv6. [#4855] Fix high cpu problem. [#4875] Fix config file read problem. [#4882] Fix listen config without auth problem. [#4883] Fix naming client NPE for Spas auth header. [#4987] Fix NPE when build ClientInfo with empty user-agent. [#4989] Fix NPE for service metadata is null during upgrade to v2. [#5001] Fix returns empty list when service has no subscribers. [#5028] Fix UpdateTask some logic errors. [#5067] Fix console detail error instances list when healthy protection by threshold. [#5080] Fix health checker pre-start logic. [#5109] Fix TcpHealthCheckProcessor.TimeOutTask may block the next check task.

Dependency

[#4383] Upgrade Nacos Api/Client modules to support JDK 1.8 compilation.

Test

Add unit test for nacos 2.0

• [#5032][#5036][#5037][#5103][#5034][#5107][#5117]