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_FLEET_ROUTING_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudoptimization.googleapis.com") used by MakeFleetRoutingConnection().
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 2025-03-21 UTC."],[[["This webpage provides documentation for various versions of a C++ optimization library, ranging from version 2.11.0 up to the release candidate 2.37.0-rc, with version 2.28.0 as the current version."],["The library's behavior can be configured using environment variables or through in-code functions, which is useful for troubleshooting issues and adjusting configurations."],["Environment variables such as `GOOGLE_CLOUD_CPP_FLEET_ROUTING_ENDPOINT` can override the default endpoint used by `MakeFleetRoutingConnection()`."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which allows for detailed tracking of requests and responses, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` can be used to turn on logging."],["The `GOOGLE_CLOUD_PROJECT` variable can be used to set the project in examples and tests, however it will not have any effect in the library."]]],[]]
