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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-08 UTC."],[[["This page lists available versions of the C++ library, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc, with the current version being 2.22.1."],["The library's behavior can be configured using environment variables, which are useful for troubleshooting and can also be set programmatically within the code."],["Environment variables like `GOOGLE_CLOUD_CPP_CASE_ATTACHMENT_SERVICE_ENDPOINT`, `GOOGLE_CLOUD_CPP_CASE_SERVICE_ENDPOINT`, and `GOOGLE_CLOUD_CPP_COMMENT_SERVICE_ENDPOINT` allow users to override default endpoints for different services."],["Logging and tracing can be enabled using variables like `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, providing valuable insights into gRPC call behavior and library operations."],["The environment variable `GOOGLE_CLOUD_PROJECT` can be used in examples and integration tests to configure the GCP project, but will not have an effect on the library itself."]]],[]]
