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_CLOUD_CHANNEL_REPORTS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudchannel.googleapis.com") used by MakeCloudChannelReportsServiceConnection().
GOOGLE_CLOUD_CPP_CLOUD_CHANNEL_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudchannel.googleapis.com") used by MakeCloudChannelServiceConnection().
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::LoggingComponentsOptionGOOGLE_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 2025-03-05 UTC."],[[["This document provides reference information for various versions of a C++ library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The library's behavior can be configured using environment variables, which are particularly useful for troubleshooting, and functions that configure this in code."],["Endpoint overrides for the Cloud Channel services can be set using `GOOGLE_CLOUD_CPP_CLOUD_CHANNEL_REPORTS_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_CLOUD_CHANNEL_SERVICE_ENDPOINT` environment variables."],["Tracing for gRPC calls can be enabled and customized using `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and the `GOOGLE_CLOUD_CPP_ENABLE_CLOG` environment variables, and there are references for the relevant options."],["The `GOOGLE_CLOUD_PROJECT` environment variable is used for setting the default project in examples and integration tests, but it does not effect the library itself."]]],[]]
