[feature] gRPC Transport & Services

[tkykenmt]

Overview

• Version: v3.0.0
• Category: feature
• Repositories: opensearch
• PRs: 4

Pull Requests

PR	Title	Category	Repository
https://github.com/opensearch-project/OpenSearch/pull/17796	Add TLS enabled SecureNetty4GrpcServerTransport	feature	opensearch
https://github.com/opensearch-project/OpenSearch/pull/17727	Add GRPC DocumentService and Bulk endpoint	feature	opensearch
https://github.com/opensearch-project/OpenSearch/pull/17830	Add SearchService and Search GRPC endpoint	feature	opensearch
https://github.com/opensearch-project/OpenSearch/pull/17888	Add TermsQuery support to Search GRPC endpoint	feature	opensearch

Tasks

• Investigate PRs
• Create release report: docs/releases/v3.0.0/grpc-transport--services.md
• Update feature report: docs/features/grpc-transport--services.md

[tkykenmt]

Investigation Complete

Reports Created

• Release report: docs/releases/v3.0.0/features/opensearch/grpc-transport--services.md
• Feature report: docs/features/opensearch/grpc-transport--services.md (created)

Summary

OpenSearch 3.0.0 introduces experimental gRPC transport support as an alternative to the traditional HTTP REST API. The transport-grpc plugin enables high-performance, binary-encoded communication using protocol buffers, providing efficient client integrations for Java, Go, Python, and other languages with native gRPC stubs.

Key Changes in v3.0.0

• gRPC Transport Plugin: New transport-grpc plugin providing gRPC server transport on port 9400 (default)
• TLS Support: SecureNetty4GrpcServerTransport enables encrypted gRPC connections
• DocumentService: Bulk API endpoint for batch document operations (index, create, update, delete)
• SearchService: Search API endpoint supporting match_all, term, terms, and match_none queries

Resources Used

• PR: #17796 (TLS support), #17727 (DocumentService/Bulk), #17830 (SearchService/Search), #17888 (Terms query)
• Docs: https://docs.opensearch.org/3.0/api-reference/grpc-apis/index/
• Docs: https://docs.opensearch.org/3.0/api-reference/grpc-apis/bulk/
• Docs: https://docs.opensearch.org/3.0/api-reference/grpc-apis/search/

Merged PR

• docs: add gRPC Transport & Services report for v3.0.0 #321: docs: add gRPC Transport & Services report for v3.0.0