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_CASE_ATTACHMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCaseAttachmentServiceConnection().
GOOGLE_CLOUD_CPP_CASE_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCaseServiceConnection().
GOOGLE_CLOUD_CPP_COMMENT_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudsupport.googleapis.com") used by MakeCommentServiceConnection().
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["The webpage provides a comprehensive list of library versions, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Several environment variables, including `GOOGLE_CLOUD_CPP_CASE_ATTACHMENT_SERVICE_ENDPOINT`, `GOOGLE_CLOUD_CPP_CASE_SERVICE_ENDPOINT`, and `GOOGLE_CLOUD_CPP_COMMENT_SERVICE_ENDPOINT`, can be used to override default endpoints for different service connections."],["Environment variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` are available to manage gRPC call tracing and enable logging within the library, respectively."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` allows customization of gRPC tracing behavior, such as message formatting and field truncation."]]],[]]
