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_ADVISORY_NOTIFICATIONS_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "advisorynotifications.googleapis.com") used by MakeAdvisoryNotificationsServiceConnection().
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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe webpage provides documentation for various versions of the Advisory Notifications library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe environment variable \u003ccode\u003eGOOGLE_CLOUD_CPP_ADVISORY_NOTIFICATIONS_SERVICE_ENDPOINT\u003c/code\u003e allows users to override the default endpoint used by \u003ccode\u003eMakeAdvisoryNotificationsServiceConnection\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be enabled by setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, and additional logging can be set by using \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe behavior of gRPC tracing can be modified via the \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e environment variable.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e can be used to configure the GCP project in examples and tests, but does not have an effect on the library.\u003c/p\u003e\n"]]],[],null,["Version 2.18.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/advisorynotifications/latest/advisorynotifications-env)\n- [2.41.0](/cpp/docs/reference/advisorynotifications/2.41.0/advisorynotifications-env)\n- [2.40.0](/cpp/docs/reference/advisorynotifications/2.40.0/advisorynotifications-env)\n- [2.39.0](/cpp/docs/reference/advisorynotifications/2.39.0/advisorynotifications-env)\n- [2.38.0](/cpp/docs/reference/advisorynotifications/2.38.0/advisorynotifications-env)\n- [2.37.0](/cpp/docs/reference/advisorynotifications/2.37.0/advisorynotifications-env)\n- [2.36.0](/cpp/docs/reference/advisorynotifications/2.36.0/advisorynotifications-env)\n- [2.35.0](/cpp/docs/reference/advisorynotifications/2.35.0/advisorynotifications-env)\n- [2.34.0](/cpp/docs/reference/advisorynotifications/2.34.0/advisorynotifications-env)\n- [2.33.0](/cpp/docs/reference/advisorynotifications/2.33.0/advisorynotifications-env)\n- [2.32.0](/cpp/docs/reference/advisorynotifications/2.32.0/advisorynotifications-env)\n- [2.31.0](/cpp/docs/reference/advisorynotifications/2.31.0/advisorynotifications-env)\n- [2.30.0](/cpp/docs/reference/advisorynotifications/2.30.0/advisorynotifications-env)\n- [2.29.0](/cpp/docs/reference/advisorynotifications/2.29.0/advisorynotifications-env)\n- [2.28.0](/cpp/docs/reference/advisorynotifications/2.28.0/advisorynotifications-env)\n- [2.27.0](/cpp/docs/reference/advisorynotifications/2.27.0/advisorynotifications-env)\n- [2.26.0](/cpp/docs/reference/advisorynotifications/2.26.0/advisorynotifications-env)\n- [2.25.1](/cpp/docs/reference/advisorynotifications/2.25.1/advisorynotifications-env)\n- [2.24.0](/cpp/docs/reference/advisorynotifications/2.24.0/advisorynotifications-env)\n- [2.23.0](/cpp/docs/reference/advisorynotifications/2.23.0/advisorynotifications-env)\n- [2.22.1](/cpp/docs/reference/advisorynotifications/2.22.1/advisorynotifications-env)\n- [2.21.0](/cpp/docs/reference/advisorynotifications/2.21.0/advisorynotifications-env)\n- [2.20.0](/cpp/docs/reference/advisorynotifications/2.20.0/advisorynotifications-env)\n- [2.19.0](/cpp/docs/reference/advisorynotifications/2.19.0/advisorynotifications-env)\n- [2.18.0](/cpp/docs/reference/advisorynotifications/2.18.0/advisorynotifications-env)\n- [2.17.0](/cpp/docs/reference/advisorynotifications/2.17.0/advisorynotifications-env)\n- [2.16.0](/cpp/docs/reference/advisorynotifications/2.16.0/advisorynotifications-env)\n- [2.15.1](/cpp/docs/reference/advisorynotifications/2.15.1/advisorynotifications-env)\n- [2.14.0](/cpp/docs/reference/advisorynotifications/2.14.0/advisorynotifications-env)\n- [2.13.0](/cpp/docs/reference/advisorynotifications/2.13.0/advisorynotifications-env)\n- [2.12.0](/cpp/docs/reference/advisorynotifications/2.12.0/advisorynotifications-env)\n- [2.11.0](/cpp/docs/reference/advisorynotifications/2.11.0/advisorynotifications-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_ADVISORY_NOTIFICATIONS_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"advisorynotifications.googleapis.com\") used by `MakeAdvisoryNotificationsServiceConnection()`.\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::TracingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1TracingComponentsOption.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."]]
