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_RESOURCE_SETTINGS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "resourcesettings.googleapis.com") used by MakeResourceSettingsServiceConnection().
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 details environment variables and configurations for the Resource Settings C++ library, covering versions from 2.11.0 up to the latest release candidate, 2.37.0-rc."],["You can override the default service endpoint using the `GOOGLE_CLOUD_CPP_RESOURCE_SETTINGS_SERVICE_ENDPOINT` environment variable for troubleshooting and specific configurations."],["The library supports gRPC tracing with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which outputs request and response information, and requires `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to view that output."],["The `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` environment variable allows modification of the gRPC tracing behavior, such as formatting and field truncation."],["`GOOGLE_CLOUD_PROJECT` can be used in examples and tests to configure the GCP project but will not affect the underlying functionality of the library."]]],[]]
