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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 OverridesGOOGLE_CLOUD_CPP_BINAUTHZ_MANAGEMENT_SERVICE_V1_ENDPOINT=... overrides the EndpointOption (which defaults to "binaryauthorization.googleapis.com") used by MakeBinauthzManagementServiceV1Connection().GOOGLE_CLOUD_CPP_SYSTEM_POLICY_V1_ENDPOINT=... overrides the EndpointOption (which defaults to "binaryauthorization.googleapis.com") used by MakeSystemPolicyV1Connection().GOOGLE_CLOUD_CPP_VALIDATION_HELPER_V1_ENDPOINT=... overrides the EndpointOption (which defaults to "binaryauthorization.googleapis.com") used by MakeValidationHelperV1Connection().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.
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.
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.
GOOGLE_CLOUD_PROJECT=...: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["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 2025-08-14 UTC."],[[["The latest release candidate version is 2.37.0-rc, and the page includes versions from 2.36.0 down to 2.11.0, providing access to previous versions for the user."],["Environment variables can be used to configure the behavior of the library, especially useful when troubleshooting problems, and can be set to override endpoint options for specific connections."],["Tracing for gRPC calls can be enabled by setting the environment variable `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which logs requests and responses, with additional variables to modify output and whether to output on the program's console."],["The environment variable `GOOGLE_CLOUD_PROJECT=...` can be used in examples and integration tests to configure the GCP project but has no direct effect on the library's functionality."],["Enabling logging in the library is done by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, which will cause the logging infrastructure to actually print the output, however the user needs to set the backend or this environment variable."]]],[]]
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