A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "networkservices.googleapis.com") used by MakeNetworkServicesConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::TracingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-21 UTC."],[[["This document provides a detailed list of available versions for the Network Services C++ library, ranging from version 2.12.0 to the latest release candidate 2.37.0-rc."],["Environment variables such as `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` can be used to customize library behavior, including overriding the default endpoint."],["The document explains how to enable and configure gRPC call tracing using variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, which provide insights into gRPC requests and responses."],["Logging functionality can be activated using `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, which is required to see the library's logging output, and is complemented by links to documentation about `LogBackend` and `LogSink`."],["The environment variable `GOOGLE_CLOUD_PROJECT` can be used in testing and examples, but it has no impact on the C++ library itself."]]],[]]
