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_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.
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["This page documents environment variables and their effects on the behavior of the C++ library for Binary Authorization, which can be useful for troubleshooting."],["The library supports endpoint overrides for specific services, such as `GOOGLE_CLOUD_CPP_BINAUTHZ_MANAGEMENT_SERVICE_V1_ENDPOINT`, allowing customization of the connection endpoint for each service."],["Tracing can be enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` to monitor gRPC calls, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` needs to be set to output the result to the console, in addition to the tracing."],["The `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` variable can configure how gRPC tracing messages are formatted, such as modifying output to multiple lines or string truncation."],["The `GOOGLE_CLOUD_PROJECT` variable can be used in examples and tests, but does not alter the behavior of the library."]]],[]]
