basic implement tso gPRC service

[binshi-bing]

Signed-off-by: Bin Shi [email protected]

What problem does this PR solve?

Issue Number: Ref #5836

What is changed and how does it work?

Implement TSO gRPC service. We refactor and move tso rpcs' implementation from pd/server to pkg/tso so that both pd server and the independent TSO mcs can share the same tso logic layer and hide the internal data structures and logics from the upper layer. By doing so, we can adding multi-tenant and sharding while keep grpc layer stable.

1. Basic implement TSO gRPC service
2. Update kvproto to reuse pdpb tso messages and add GetMembers() rpc. Adjust to the following two main changes in the gPRC protocol:
    a. Add keyspace id and keyspace_group_id to RequestHeader/Response Header to support multi-tenant.
    b. Define new XXXRequest/XXXResponse messages by reusing the messages in pdpb for better back-compatibility. The tenant tso protocol can also evolve independently by adding new rpcs and new messages.
3.  Implement rpcs GetMembers() and Tso()
4. Implement rpcs SyncMaxTS() and GetDCLocationInfo()
5. Implement rpcs SetExternalTimestamp() and GetExternalTimestamp() 

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

None

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[ti-chi-bot]

Hi @binshi-bing. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov]

Codecov Report

Patch coverage: 65.73% and project coverage change: +0.10 🎉

Comparison is base (e6086c4) 75.13% compared to head (764b7ec) 75.24%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5949      +/-   ##
==========================================
+ Coverage   75.13%   75.24%   +0.10%     
==========================================
  Files         362      363       +1     
  Lines       36282    36302      +20     
==========================================
+ Hits        27262    27316      +54     
+ Misses       6645     6618      -27     
+ Partials     2375     2368       -7     

Flag	Coverage Δ
unittests	75.24% <65.73%> (+0.10%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/keyspace_service.go	61.19% <0.00%> (ø)
server/metrics.go	100.00% <ø> (ø)
server/util.go	46.37% <ø> (-5.31%)	⬇️
server/grpc_service.go	45.42% <57.14%> (-3.74%)	⬇️
pkg/tso/grpc_server.go	65.65% <65.65%> (ø)
server/server.go	74.73% <66.66%> (-1.04%)	⬇️
pkg/utils/etcdutil/etcdutil.go	82.17% <69.23%> (-3.27%)	⬇️
pkg/tso/metrics.go	100.00% <100.00%> (ø)
pkg/utils/grpcutil/grpcutil.go	70.68% <100.00%> (+3.38%)	⬆️

... and 19 files with indirect coverage changes

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[ti-chi-bot]

@binshi-bing: PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[rleungx]

Shall we close it now?

[binshi-bing]

Broken down into separate prs.

[binshi-bing]

Shall we close it now?

closed