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_EKM_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudkms.googleapis.com") used by MakeEkmServiceConnection().
GOOGLE_CLOUD_CPP_KEY_DASHBOARD_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "kmsinventory.googleapis.com") used by MakeKeyDashboardServiceConnection().
GOOGLE_CLOUD_CPP_KEY_MANAGEMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudkms.googleapis.com") used by MakeKeyManagementServiceConnection().
GOOGLE_CLOUD_CPP_KEY_TRACKING_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "kmsinventory.googleapis.com") used by MakeKeyTrackingServiceConnection().
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-02 UTC."],[[["This document provides reference information for multiple versions of a C++ library, ranging from version 2.10.1 to the latest release candidate 2.37.0-rc."],["The behavior of the library can be configured using environment variables, which is particularly useful for troubleshooting and overriding default settings."],["Specific environment variables, such as `GOOGLE_CLOUD_CPP_..._ENDPOINT`, allow overriding the default endpoints for various services like `EkmService`, `KeyDashboardService`, `KeyManagementService`, and `KeyTrackingService`."],["Environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` are used to manage gRPC call tracing and the library's logging output respectively."],["`GOOGLE_CLOUD_PROJECT` is an environment variable to set the project in the examples and integration tests but has no impact on the library's behavior."]]],[]]
