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_MANAGED_NOTEBOOK_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "notebooks.googleapis.com") used by MakeManagedNotebookServiceConnection().
GOOGLE_CLOUD_CPP_NOTEBOOK_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "notebooks.googleapis.com") used by MakeNotebookServiceConnection().
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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++ notebooks environment, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe document outlines environment variables like \u003ccode\u003eGOOGLE_CLOUD_CPP_MANAGED_NOTEBOOK_SERVICE_ENDPOINT\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_NOTEBOOK_SERVICE_ENDPOINT\u003c/code\u003e, which can be used to override default endpoints.\u003c/p\u003e\n"],["\u003cp\u003eYou can use the \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e environment variable to turn on detailed tracing for gRPC calls, helping with debugging.\u003c/p\u003e\n"],["\u003cp\u003eLogging can be enabled in the library by setting the \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e variable to "yes", to allow for output on the programs console.\u003c/p\u003e\n"],["\u003cp\u003eThe variable \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e can be used in examples and tests, but does not affect the behavior of the library itself.\u003c/p\u003e\n"]]],[],null,[]]
