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_ATTACHED_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_AWS_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_AZURE_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
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 2025-04-23 UTC."],[[["This document provides a comprehensive list of available versions for the GKE Multi-Cloud environment, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["Several environment variables can be used to adjust the behavior of the library, making them particularly useful when debugging."],["Endpoint overrides are available using the environment variables such as `GOOGLE_CLOUD_CPP_ATTACHED_CLUSTERS_ENDPOINT`, `GOOGLE_CLOUD_CPP_AWS_CLUSTERS_ENDPOINT`, and `GOOGLE_CLOUD_CPP_AZURE_CLUSTERS_ENDPOINT`."],["You can enable gRPC call tracing by setting the `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` environment variable, and can use the `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to view the logging output on the console."],["The environment variable, `GOOGLE_CLOUD_PROJECT`, is used for configuration in tests and examples, however it does not impact the library itself."]]],[]]
