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::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 environment variable configurations and version history for the network management library, with version 2.37.0-rc being the latest release candidate."],["The `GOOGLE_CLOUD_CPP_REACHABILITY_SERVICE_ENDPOINT` variable allows users to override the default endpoint used by `MakeReachabilityServiceConnection`."],["`GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can be used to control gRPC tracing behavior, such as logging gRPC requests/responses."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG` activates logging within the library, enabling output to the console when set to `yes`."],["`GOOGLE_CLOUD_PROJECT` is used to set the default project for examples and tests, but has no effect on the library itself."]]],[]]
