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_NETWORK_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "networkservices.googleapis.com") used by MakeNetworkServicesConnection().
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."],[[["The latest release candidate version for network services is 2.37.0-rc, followed by several stable releases including 2.36.0, 2.35.0, and so forth, going down to version 2.12.0."],["Environment variables can be utilized to configure library behavior, particularly helpful for troubleshooting, and there are functions that allow you to configure behavior in code."],["The `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` environment variable can override the default endpoint for network services."],["Tracing for gRPC calls can be enabled using the `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` environment variable, along with `GOOGLE_CLOUD_CPP_ENABLE_CLOG` for console output, and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` will modify the behavior of the gRPC tracing."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` can be used to enable logging in the library, allowing logging messages to be displayed to the console when using the default logging infrastructure."]]],[]]
