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_DEP_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "networkservices.googleapis.com") used by MakeDepServiceConnection().
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::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 2025-03-14 UTC."],[[["The latest version available for the network services documentation is 2.37.0-rc, while there are many other versions such as 2.36.0, 2.35.0 and many other versions going back to 2.12.0."],["Environment variables can be used to adjust library behavior, which is useful for troubleshooting and they are able to override options such as the `EndpointOption` using `GOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT` or `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT`."],["Tracing for gRPC calls can be activated with the `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` variable, which requires that you configure a logging backend, or that you enable the variable `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The logging behavior is customizable with variables such as `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` which can modify gRPC tracing behavior, and setting the variable `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` allows the application to set a backend to display the logging of the library."]]],[]]
