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::TracingComponentsOptionGOOGLE_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 document provides an overview of various versions of the optimization environment, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Several environment variables, such as `GOOGLE_CLOUD_CPP_FLEET_ROUTING_ENDPOINT`, can be utilized to configure the library's behavior, including setting endpoint overrides and managing tracing."],["The `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` environment variables enable detailed tracing and logging for gRPC calls, assisting in troubleshooting and debugging."],["Environment variables like `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can further modify gRPC tracing behavior, such as formatting and truncation."],["The environment variable `GOOGLE_CLOUD_PROJECT` is primarily used in examples and integration tests for setting the GCP project but does not directly impact the library's core functionality."]]],[]]
