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 2025-03-21 UTC."],[[["This page details environment variables and configuration options for the Network Services C++ client library, covering versions from 2.12.0 to 2.37.0-rc, with 2.37.0-rc being the latest release candidate."],["Environment variables such as `GOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` can override the default endpoints for different services, allowing for custom network configurations."],["The `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` variable enables tracing for gRPC calls, and when combined with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, it produces detailed logging output on the console."],["Variables such as `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` provide control over gRPC tracing behavior and logging, such as output format and enabling logging to a backend."],["The `GOOGLE_CLOUD_PROJECT` environment variable is used for project configuration in examples and integration tests but does not affect the library's behavior."]]],[]]
