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::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 2025-03-14 UTC."],[[["This page provides documentation for various versions of the C++ library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Environment variables are detailed for configuring the library's behavior, specifically highlighting the ability to override endpoints for the Cloud Channel Reports and Service."],["The documentation outlines how to enable gRPC tracing and logging using environment variables, as well as providing configuration options for more granular tracing control."],["There are multiple links provided to the google cloud documentation so that you may learn more about Tracing and Logging for Cloud, as well as the ability to override default endpoints."],["Setting the default GCP project can be achieved through the environment variable `GOOGLE_CLOUD_PROJECT`, but this is for examples and tests, not library functionality."]]],[]]
