agents: enable compression in GrpcAgent #346

santigimeno · 2025-07-23T08:54:58Z

Summary by CodeRabbit

New Features
- Enabled gzip compression for all OTLP gRPC communications, improving data transfer efficiency for traces, metrics, and logs.

coderabbitai · 2025-07-23T08:55:04Z

Walkthrough

The update adds gzip compression to all OTLP gRPC communications configured by the agent. This is achieved by setting the compression field to "gzip" in the client and exporter option objects within the GrpcAgent::config method. No other logic, error handling, or public interfaces are affected.

Changes

Cohort / File(s)	Change Summary
Enable gzip compression in OTLP gRPC options `agents/grpc/src/grpc_agent.cc`	Sets `compression` to `"gzip"` for OTLP gRPC client and all exporter option objects in `GrpcAgent::config`. No other logic or interface changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A hop and a skip, a packet zipped tight,
Gzip now travels with data in flight.
The agent’s new trick—compression so neat—
Makes OTLP gRPC streams light on their feet.
With every small change, we rabbits delight! 🐇✨

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agents/grpc/src/grpc_agent.cc (4 hunks)

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agents/grpc/src/grpc_agent.cc

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coderabbitai

Actionable comments posted: 0

🧹 Nitpick comments (1)

agents/grpc/src/grpc_agent.cc (1)
1048-1048: Avoid copy-pasting the magic literal "gzip" four times

The same compression value is assigned to every OTLP option struct. This is easy to miss when further exporters are added and slightly clutters the diff.
-      opts.compression = "gzip";
+      constexpr char kGrpcCompression[] = "gzip";
+      opts.compression = kGrpcCompression;
...
-        options.compression = "gzip";
+        options.compression = kGrpcCompression;
...
-        options.compression = "gzip";
+        options.compression = kGrpcCompression;
...
-        options.compression = "gzip";
+        options.compression = kGrpcCompression;
(Or wrap the common initialisation in a small helper that fills all the shared fields.)

No functional change, but it improves maintainability and keeps future edits in one place.

Also applies to: 1074-1074, 1091-1091, 1109-1109

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Reviewing files that changed from the base of the PR and between 580c207 and 90bf424.

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agents/grpc/src/grpc_agent.cc (4 hunks)

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🔇 Additional comments (1)

agents/grpc/src/grpc_agent.cc (1)

1048-1049: Verified correct use of compression field

The vendored OtlpGrpcClientOptions struct in
deps/opentelemetry-cpp/exporters/otlp/include/opentelemetry/exporters/otlp/otlp_grpc_client_options.h
(lines 58–60) defines:

std::string compression;

Assigning opts.compression = "gzip"; will correctly enable gzip compression at runtime. No changes needed.

juanarbol

LGTM

RafaelGSS

Do we have tests for it?

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

santigimeno · 2025-08-20T08:24:57Z

Landed in 01455a7

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> PR-URL: #359

santigimeno requested review from RafaelGSS and juanarbol July 23, 2025 08:54

santigimeno self-assigned this Jul 23, 2025

coderabbitai bot reviewed Jul 23, 2025

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coderabbitai bot approved these changes Jul 23, 2025

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santigimeno force-pushed the node-v22.x-nsolid-v5.x branch from 580c207 to b22a61c Compare July 23, 2025 15:32

santigimeno force-pushed the santi/enable_compression branch from 90bf424 to dbc0aaa Compare July 23, 2025 15:36

agents: enable compression in GrpcAgent

3363fbd

santigimeno force-pushed the santi/enable_compression branch from f9e9b16 to 3363fbd Compare August 6, 2025 14:03

juanarbol approved these changes Aug 19, 2025

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RafaelGSS approved these changes Aug 19, 2025

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santigimeno added a commit that referenced this pull request Aug 20, 2025

agents: enable compression in GrpcAgent

01455a7

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

santigimeno closed this Aug 20, 2025

santigimeno deleted the santi/enable_compression branch August 20, 2025 08:25

santigimeno added a commit that referenced this pull request Aug 25, 2025

agents: enable compression in GrpcAgent

7d36db6

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

santigimeno added a commit that referenced this pull request Aug 26, 2025

agents: enable compression in GrpcAgent

6fe5981

PR-URL: #346 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> PR-URL: #359

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