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_QUOTA_CONTROLLER_ENDPOINT=... overrides the EndpointOption (which defaults to "servicecontrol.googleapis.com") used by MakeQuotaControllerConnection().
GOOGLE_CLOUD_CPP_SERVICE_CONTROLLER_ENDPOINT=... overrides the EndpointOption (which defaults to "servicecontrol.googleapis.com") used by MakeServiceControllerConnection().
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 comprehensive list of available versions for the service control library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["Environment variables can be utilized to configure the library's behavior, and there are also in-code functions that allow you to configure it as well."],["The `GOOGLE_CLOUD_CPP_QUOTA_CONTROLLER_ENDPOINT` and `GOOGLE_CLOUD_CPP_SERVICE_CONTROLLER_ENDPOINT` environment variables can be used to override the default endpoint for quota and service controller connections, respectively."],["Tracing for gRPC calls can be enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and further customized using the `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` variable."],["The `GOOGLE_CLOUD_CPP_ENABLE_CLOG` environment variable is useful for turning on logging, allowing the library's logging infrastructure to have an output backend for it to print on the console."]]],[]]
