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 2025-03-05 UTC."],[[["This document provides a comprehensive list of the available versions, ranging from 2.37.0-rc (latest) down to version 2.11.0, for reference functions."],["The environment variables can be leveraged to adjust the library's configuration, with dedicated functions available for in-code configuration, which are particularly useful when troubleshooting."],["You can override default endpoint settings with specific environment variables, such as `GOOGLE_CLOUD_CPP_CLOUD_FUNCTIONS_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_FUNCTION_SERVICE_ENDPOINT`."],["Detailed tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` should also be used to ensure the output of this tracing, making it visible on the console."],["The environment variable `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` lets you configure how gRPC tracing behaves, including message formatting and field truncation, among other options."]]],[]]
