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_REACHABILITY_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "networkmanagement.googleapis.com") used by MakeReachabilityServiceConnection().
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 2025-03-14 UTC."],[[["This document provides environment variable configurations and version history for a C++ network management library, with the latest release candidate being version 2.37.0-rc."],["Several environment variables are detailed, such as `GOOGLE_CLOUD_CPP_REACHABILITY_SERVICE_ENDPOINT`, which allows overriding the default endpoint used by the `MakeReachabilityServiceConnection()` function."],["The document describes tracing and logging functionalities, enabled through environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, which aid in debugging and monitoring gRPC calls and library behavior."],["The `GOOGLE_CLOUD_PROJECT` environment variable is also discussed, highlighting that it is used for examples and tests, but does not affect library functionality."],["There is a list of available versions of the library, from version 2.11.0 up to 2.37.0-rc, with links to their respective documentation pages."]]],[]]
