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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-08 UTC."],[[["This document provides reference information for the KMS (Key Management Service) environment, with version 2.37.0-rc being the latest release candidate."],["The document includes a comprehensive list of versions ranging from 2.10.1 up to 2.37.0-rc, each with links to its respective documentation."],["Environment variables are available for customizing library behavior, such as troubleshooting and overriding service endpoints for EKM, Key Dashboard, Key Management, and Key Tracking services."],["Logging and tracing features can be enabled and configured via environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, to monitor gRPC calls and library activity."],["The `GOOGLE_CLOUD_PROJECT` environment variable can be used in examples and tests, but does not directly affect library function."]]],[]]
