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_CERTIFICATE_MANAGER_ENDPOINT=...overrides theEndpointOption(which defaults to "certificatemanager.googleapis.com") used byMakeCertificateManagerConnection().
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 release candidate for the Certificate Manager is version 2.37.0-rc, which is available via a specific link, alongside other versions.\u003c/p\u003e\n"],["\u003cp\u003eThis page details environment variables that can be utilized to customize the library's operation, offering a flexible method for managing configurations during troubleshooting.\u003c/p\u003e\n"],["\u003cp\u003eThe library's behavior can be configured via environment variables such as \u003ccode\u003eGOOGLE_CLOUD_CPP_CERTIFICATE_MANAGER_ENDPOINT\u003c/code\u003e for endpoint overrides and various logging configurations.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be activated using \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, and \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e to show the logs on the console, allowing for detailed debugging.\u003c/p\u003e\n"],["\u003cp\u003eWhile \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e can be used for examples and testing, it does not affect the core functionality of the library.\u003c/p\u003e\n"]]],[],null,["Version 2.27.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/certificatemanager/latest/certificatemanager-env)\n- [2.41.0](/cpp/docs/reference/certificatemanager/2.41.0/certificatemanager-env)\n- [2.40.0](/cpp/docs/reference/certificatemanager/2.40.0/certificatemanager-env)\n- [2.39.0](/cpp/docs/reference/certificatemanager/2.39.0/certificatemanager-env)\n- [2.38.0](/cpp/docs/reference/certificatemanager/2.38.0/certificatemanager-env)\n- [2.37.0](/cpp/docs/reference/certificatemanager/2.37.0/certificatemanager-env)\n- [2.36.0](/cpp/docs/reference/certificatemanager/2.36.0/certificatemanager-env)\n- [2.35.0](/cpp/docs/reference/certificatemanager/2.35.0/certificatemanager-env)\n- [2.34.0](/cpp/docs/reference/certificatemanager/2.34.0/certificatemanager-env)\n- [2.33.0](/cpp/docs/reference/certificatemanager/2.33.0/certificatemanager-env)\n- [2.32.0](/cpp/docs/reference/certificatemanager/2.32.0/certificatemanager-env)\n- [2.31.0](/cpp/docs/reference/certificatemanager/2.31.0/certificatemanager-env)\n- [2.30.0](/cpp/docs/reference/certificatemanager/2.30.0/certificatemanager-env)\n- [2.29.0](/cpp/docs/reference/certificatemanager/2.29.0/certificatemanager-env)\n- [2.28.0](/cpp/docs/reference/certificatemanager/2.28.0/certificatemanager-env)\n- [2.27.0](/cpp/docs/reference/certificatemanager/2.27.0/certificatemanager-env)\n- [2.26.0](/cpp/docs/reference/certificatemanager/2.26.0/certificatemanager-env)\n- [2.25.1](/cpp/docs/reference/certificatemanager/2.25.1/certificatemanager-env)\n- [2.24.0](/cpp/docs/reference/certificatemanager/2.24.0/certificatemanager-env)\n- [2.23.0](/cpp/docs/reference/certificatemanager/2.23.0/certificatemanager-env)\n- [2.22.1](/cpp/docs/reference/certificatemanager/2.22.1/certificatemanager-env)\n- [2.21.0](/cpp/docs/reference/certificatemanager/2.21.0/certificatemanager-env)\n- [2.20.0](/cpp/docs/reference/certificatemanager/2.20.0/certificatemanager-env)\n- [2.19.0](/cpp/docs/reference/certificatemanager/2.19.0/certificatemanager-env)\n- [2.18.0](/cpp/docs/reference/certificatemanager/2.18.0/certificatemanager-env)\n- [2.17.0](/cpp/docs/reference/certificatemanager/2.17.0/certificatemanager-env)\n- [2.16.0](/cpp/docs/reference/certificatemanager/2.16.0/certificatemanager-env)\n- [2.15.1](/cpp/docs/reference/certificatemanager/2.15.1/certificatemanager-env)\n- [2.14.0](/cpp/docs/reference/certificatemanager/2.14.0/certificatemanager-env)\n- [2.13.0](/cpp/docs/reference/certificatemanager/2.13.0/certificatemanager-env)\n- [2.12.0](/cpp/docs/reference/certificatemanager/2.12.0/certificatemanager-env)\n- [2.11.0](/cpp/docs/reference/certificatemanager/2.11.0/certificatemanager-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_CERTIFICATE_MANAGER_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"certificatemanager.googleapis.com\") used by `MakeCertificateManagerConnection()`.\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."]]
