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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page provides documentation for various versions of the C++ KMS library, ranging from version 2.10.1 up to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables like \u003ccode\u003eGOOGLE_CLOUD_CPP_EKM_SERVICE_ENDPOINT\u003c/code\u003e can be used to override default service endpoints, allowing for customization of the library's behavior.\u003c/p\u003e\n"],["\u003cp\u003eThe library supports gRPC call tracing, enabled via \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, and provides options for configuring the tracing output through \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e environment variable enables logging within the library, allowing for visibility into its internal operations.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e environment variable is used in the libraries examples and integration tests, but has no effect in the library.\u003c/p\u003e\n"]]],[],null,[]]
