[META] gRPC Server

[finnegancarroll]

Please describe the end goal of this project

Add an experimental client facing gRPC server to OpenSearch mirroring common REST endpoints for use in a gRPC/Protobuf ecosystem. The goal of this issue is to track completed and planned protobuf service implementations to be exposed on the gRPC server.

Expected benefits of exposing gRPC/Protobuf services for indexing and search operations:

• Requests in a binary format (protobuf) are smaller and faster to serialize/deserialize.
• Multiplexing and streaming with HTTP2. gRPC makes it particularly easy to expose streaming alternatives for existing service implementations.
• Following protobuf best practices apis can be updated while maintaining backwards compatibility with old versions.
• Language agnostic client/server generation from protobuf definitions.

Supporting References

Performance testing w/ low latency protobuf queries - #15190
Performance testing w/ transport layer protobuf - #15308
Indexing api issue - #16711
Search api issue - #16710
POC implementation PR - #16534
Feature branch - Branch

Issues

• gRPC server - PR
• Match all query
• Term query
• Bulk
• Index document

Related component

Other

[dblock]

[Catch All Triage - 1, 2, 3, 4]