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_FUNCTIONS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudfunctions.googleapis.com") used by MakeCloudFunctionsServiceConnection().
GOOGLE_CLOUD_CPP_FUNCTION_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudfunctions.googleapis.com") used by MakeFunctionServiceConnection().
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 2025-05-07 UTC."],[[["This document provides a comprehensive list of available versions, ranging from the latest release candidate `2.37.0-rc` down to version `2.11.0`, along with links to their respective function environment documentation."],["The library's behavior can be configured using various environment variables, which are particularly helpful when debugging or troubleshooting, and these variables can override certain settings or options."],["You can override the default endpoints for cloud functions and function services using the `GOOGLE_CLOUD_CPP_CLOUD_FUNCTIONS_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_FUNCTION_SERVICE_ENDPOINT` environment variables, respectively."],["The library offers the ability to enable gRPC tracing via the `GOOGLE_CLOUD_CPP_ENABLE_TRACING` environment variable and logging via `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, allowing for detailed monitoring of gRPC calls and general logging within the library."]]],[]]
