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 theEndpointOption(which defaults to "networkservices.googleapis.com") used byMakeDepServiceConnection().
GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT=...overrides theEndpointOption(which defaults to "networkservices.googleapis.com") used byMakeNetworkServicesConnection().
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 setGOOGLE_CLOUD_CPP_ENABLE_CLOGto 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 2025-09-04 UTC."],[[["\u003cp\u003eThe latest version available is 2.37.0-rc, with numerous other versions, such as 2.36.0, 2.35.0, and down to 2.12.0, also being accessible.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables provide a way to configure the library's behavior and are particularly useful for troubleshooting, with examples of such variables including \u003ccode\u003eGOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT\u003c/code\u003e for overriding endpoint options.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be enabled via the \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e environment variable, which, in conjunction with \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e, will print the output to the console.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e environment variable allows modification of gRPC tracing behavior, including adjusting the format and truncation of output messages.\u003c/p\u003e\n"],["\u003cp\u003eSetting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e enables logging within the library by providing a backend, allowing for visibility into the library's internal operations, regardless of whether the user application has configured a backend or not.\u003c/p\u003e\n"]]],[],null,["Version 2.35.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/networkservices/latest/networkservices-env)\n- [2.41.0](/cpp/docs/reference/networkservices/2.41.0/networkservices-env)\n- [2.40.0](/cpp/docs/reference/networkservices/2.40.0/networkservices-env)\n- [2.39.0](/cpp/docs/reference/networkservices/2.39.0/networkservices-env)\n- [2.38.0](/cpp/docs/reference/networkservices/2.38.0/networkservices-env)\n- [2.37.0](/cpp/docs/reference/networkservices/2.37.0/networkservices-env)\n- [2.36.0](/cpp/docs/reference/networkservices/2.36.0/networkservices-env)\n- [2.35.0](/cpp/docs/reference/networkservices/2.35.0/networkservices-env)\n- [2.34.0](/cpp/docs/reference/networkservices/2.34.0/networkservices-env)\n- [2.33.0](/cpp/docs/reference/networkservices/2.33.0/networkservices-env)\n- [2.32.0](/cpp/docs/reference/networkservices/2.32.0/networkservices-env)\n- [2.31.0](/cpp/docs/reference/networkservices/2.31.0/networkservices-env)\n- [2.30.0](/cpp/docs/reference/networkservices/2.30.0/networkservices-env)\n- [2.29.0](/cpp/docs/reference/networkservices/2.29.0/networkservices-env)\n- [2.28.0](/cpp/docs/reference/networkservices/2.28.0/networkservices-env)\n- [2.27.0](/cpp/docs/reference/networkservices/2.27.0/networkservices-env)\n- [2.26.0](/cpp/docs/reference/networkservices/2.26.0/networkservices-env)\n- [2.25.1](/cpp/docs/reference/networkservices/2.25.1/networkservices-env)\n- [2.24.0](/cpp/docs/reference/networkservices/2.24.0/networkservices-env)\n- [2.23.0](/cpp/docs/reference/networkservices/2.23.0/networkservices-env)\n- [2.22.1](/cpp/docs/reference/networkservices/2.22.1/networkservices-env)\n- [2.21.0](/cpp/docs/reference/networkservices/2.21.0/networkservices-env)\n- [2.20.0](/cpp/docs/reference/networkservices/2.20.0/networkservices-env)\n- [2.19.0](/cpp/docs/reference/networkservices/2.19.0/networkservices-env)\n- [2.18.0](/cpp/docs/reference/networkservices/2.18.0/networkservices-env)\n- [2.17.0](/cpp/docs/reference/networkservices/2.17.0/networkservices-env)\n- [2.16.0](/cpp/docs/reference/networkservices/2.16.0/networkservices-env)\n- [2.15.1](/cpp/docs/reference/networkservices/2.15.1/networkservices-env)\n- [2.14.0](/cpp/docs/reference/networkservices/2.14.0/networkservices-env)\n- [2.13.0](/cpp/docs/reference/networkservices/2.13.0/networkservices-env)\n- [2.12.0](/cpp/docs/reference/networkservices/2.12.0/networkservices-env) \n\nEnvironment Variables\n=====================\n\nA 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.\n\nEndpoint Overrides\n------------------\n\n- `GOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"networkservices.googleapis.com\") used by `MakeDepServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"networkservices.googleapis.com\") used by `MakeNetworkServicesConnection()`.\n\n###### See Also\n\n[`google::cloud::EndpointOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html)\n\nLogging\n-------\n\n`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.\n\n###### See Also\n\n[`google::cloud::LoggingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1LoggingComponentsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::GrpcTracingOptionsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcTracingOptionsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::LogBackend`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogBackend.html)\n\n###### See Also\n\n[`google::cloud::LogSink`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogSink.html)\n\nSetting the Default Project\n---------------------------\n\n`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to configure the GCP project. This has no effect in the library."]]
