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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page lists the available versions of the C++ Cloud Channel library, ranging from the latest release candidate 2.37.0-rc down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe page documents environment variables used to configure the library's behavior, which are primarily useful for troubleshooting.\u003c/p\u003e\n"],["\u003cp\u003eYou can override default endpoint settings for the Cloud Channel Reports and Cloud Channel services using specific environment variables.\u003c/p\u003e\n"],["\u003cp\u003eSeveral environment variables are described to control logging and tracing for gRPC calls, including options to enable detailed output and configure the formatting.\u003c/p\u003e\n"],["\u003cp\u003eSetting the \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e environment variable is only useful for examples and integration tests and does not effect the library.\u003c/p\u003e\n"]]],[],null,[]]
