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_CONFIDENTIAL_COMPUTING_ENDPOINT=... overrides the EndpointOption (which defaults to "confidentialcomputing.googleapis.com") used by MakeConfidentialComputingConnection().
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"]],[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThis document provides reference information for configuring the behavior of the Confidential Computing C++ library using environment variables, and the latest version available is 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_CPP_CONFIDENTIAL_COMPUTING_ENDPOINT\u003c/code\u003e environment variable can override the default endpoint used by \u003ccode\u003eMakeConfidentialComputingConnection()\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe library supports gRPC tracing, which can be enabled by setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, and detailed tracing options can be modified via \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eLogging can be enabled by setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e, allowing the library's logging infrastructure to output information to the program's console.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e environment variable 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 2.27.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/confidentialcomputing/latest/confidentialcomputing-env)\n- [2.41.0](/cpp/docs/reference/confidentialcomputing/2.41.0/confidentialcomputing-env)\n- [2.40.0](/cpp/docs/reference/confidentialcomputing/2.40.0/confidentialcomputing-env)\n- [2.39.0](/cpp/docs/reference/confidentialcomputing/2.39.0/confidentialcomputing-env)\n- [2.38.0](/cpp/docs/reference/confidentialcomputing/2.38.0/confidentialcomputing-env)\n- [2.37.0](/cpp/docs/reference/confidentialcomputing/2.37.0/confidentialcomputing-env)\n- [2.36.0](/cpp/docs/reference/confidentialcomputing/2.36.0/confidentialcomputing-env)\n- [2.35.0](/cpp/docs/reference/confidentialcomputing/2.35.0/confidentialcomputing-env)\n- [2.34.0](/cpp/docs/reference/confidentialcomputing/2.34.0/confidentialcomputing-env)\n- [2.33.0](/cpp/docs/reference/confidentialcomputing/2.33.0/confidentialcomputing-env)\n- [2.32.0](/cpp/docs/reference/confidentialcomputing/2.32.0/confidentialcomputing-env)\n- [2.31.0](/cpp/docs/reference/confidentialcomputing/2.31.0/confidentialcomputing-env)\n- [2.30.0](/cpp/docs/reference/confidentialcomputing/2.30.0/confidentialcomputing-env)\n- [2.29.0](/cpp/docs/reference/confidentialcomputing/2.29.0/confidentialcomputing-env)\n- [2.28.0](/cpp/docs/reference/confidentialcomputing/2.28.0/confidentialcomputing-env)\n- [2.27.0](/cpp/docs/reference/confidentialcomputing/2.27.0/confidentialcomputing-env)\n- [2.26.0](/cpp/docs/reference/confidentialcomputing/2.26.0/confidentialcomputing-env)\n- [2.25.1](/cpp/docs/reference/confidentialcomputing/2.25.1/confidentialcomputing-env)\n- [2.24.0](/cpp/docs/reference/confidentialcomputing/2.24.0/confidentialcomputing-env)\n- [2.23.0](/cpp/docs/reference/confidentialcomputing/2.23.0/confidentialcomputing-env)\n- [2.22.1](/cpp/docs/reference/confidentialcomputing/2.22.1/confidentialcomputing-env)\n- [2.21.0](/cpp/docs/reference/confidentialcomputing/2.21.0/confidentialcomputing-env)\n- [2.20.0](/cpp/docs/reference/confidentialcomputing/2.20.0/confidentialcomputing-env)\n- [2.19.0](/cpp/docs/reference/confidentialcomputing/2.19.0/confidentialcomputing-env)\n- [2.18.0](/cpp/docs/reference/confidentialcomputing/2.18.0/confidentialcomputing-env)\n- [2.17.0](/cpp/docs/reference/confidentialcomputing/2.17.0/confidentialcomputing-env)\n- [2.16.0](/cpp/docs/reference/confidentialcomputing/2.16.0/confidentialcomputing-env)\n- [2.15.1](/cpp/docs/reference/confidentialcomputing/2.15.1/confidentialcomputing-env)\n- [2.14.0](/cpp/docs/reference/confidentialcomputing/2.14.0/confidentialcomputing-env)\n- [2.13.0](/cpp/docs/reference/confidentialcomputing/2.13.0/confidentialcomputing-env)\n- [2.12.0](/cpp/docs/reference/confidentialcomputing/2.12.0/confidentialcomputing-env)\n- [2.11.0](/cpp/docs/reference/confidentialcomputing/2.11.0/confidentialcomputing-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_CONFIDENTIAL_COMPUTING_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"confidentialcomputing.googleapis.com\") used by `MakeConfidentialComputingConnection()`.\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."]]
