gRPC

As explained in Logs and Telemetry

gRPC is a high-performance remote procedure call framework that commonly uses HTTP/2 and Protocol Buffers for communication.

gRPC is a high-performance remote procedure call framework used to transmit OpenTelemetry data. Within OTLP, it commonly operates synchronously over HTTP/2 with Protocol Buffers; JSON provides a fallback path. section 1.3.2

Operationally, gRPC provides:

• A first-choice communication method for OTLP telemetry. section 1.3.2
• A way for applications and OpenTelemetry-compatible collectors to exchange telemetry through distributed pipelines. section 1.3.2

Figure 1.3 Fluent Bit’s relationship with OpenTelemetry with apps generating OTel logs, metrics, and traces and Fluent Bit facilitating their transmission to an OTel-compliant point of aggregation or processing. Applications can send OTLP data directly or via an OTel component, and we can route data to other OTel services or analysis tools.

The diagram traces applications generating logs, metrics, and traces through Fluent Bit or other OpenTelemetry components toward aggregation, processing, and analysis services. section 1.3.2

How Logs and Telemetry covers it

How deep it goes

Explains transport formats and ecosystem placement but does not descend into RPC service implementation.

Examples

Shows telemetry flowing from applications through Fluent Bit or another OpenTelemetry component to compliant services.

What you can do after

Evaluate gRPC as the preferred OTLP transport and recognize JSON as its fallback alternative.

How it connects

Connects gRPC with OpenTelemetry Protocol, HTTP/2, Protocol Buffers, JSON, and OpenTelemetry Collector architectures.

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Related concepts

• protocol bufferuses · Protocol Buffers is a language- and platform-neutral schema system and compact binary serialization format for structured data, with support for generated code.
• RESTalternative to · REST is an architectural style for distributed hypermedia systems that organizes interactions around resources and representations through constraints including a uniform interface, stateless communication, cacheability, and layered components.
• remote procedure callimplements · A remote procedure call is a communication technique in which a program invokes an operation executed in another process or system, typically through an interface resembling a local procedure call.
• http/2uses · HTTP/2 is a version of the Hypertext Transfer Protocol that uses binary framing to multiplex request and response streams over a connection.
• grpcurlused by · grpcurl is a command-line tool for inspecting gRPC service definitions and invoking methods on gRPC servers.
• HTTPuses · HTTP is a standardized application-layer protocol that defines request-and-response messages for transferring resource representations between networked systems.

This explainer was generated by Manning's knowledge graph from the text of Logs and Telemetry. The section links point to the parts of the book it draws on.