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_TRACE_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudtrace.googleapis.com") used by MakeTraceServiceConnection().
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 lists available versions of the trace environment, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Environment variables like `GOOGLE_CLOUD_CPP_TRACE_SERVICE_ENDPOINT` can override default settings for the trace service endpoint, useful for customizing connections."],["Tracing for gRPC calls can be activated by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which will output each gRPC request and response for debugging."],["Logging can be turned on using the `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` environment variable, enabling the library to print log information to the program's console."],["The `GOOGLE_CLOUD_PROJECT` environment variable can be used to set the project for examples and integration tests, although it does not impact library functionality."]]],[]]
