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_ACCESS_CONTEXT_MANAGER_ENDPOINT=... overrides the EndpointOption (which defaults to "accesscontextmanager.googleapis.com") used by MakeAccessContextManagerConnection().
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"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-05 UTC."],[[["This page details various versions of the Access Context Manager, with version 2.37.0-rc being the latest release candidate and 2.18.0 being the oldest version listed."],["Environment variables like `GOOGLE_CLOUD_CPP_ACCESS_CONTEXT_MANAGER_ENDPOINT` can override default settings such as the endpoint used by `MakeAccessContextManagerConnection()`."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, allowing for the logging of each request and response, and can also be enhanced with `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["Logging within the library can be activated by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, which will direct log output to the program's console."],["The environment variable `GOOGLE_CLOUD_PROJECT` is used in examples and integration tests to set the GCP project, but it does not affect the library's functionality."]]],[]]
