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_CONTROLLER2_ENDPOINT=... overrides the EndpointOption (which defaults to "clouddebugger.googleapis.com") used by MakeController2Connection().
GOOGLE_CLOUD_CPP_DEBUGGER2_ENDPOINT=... overrides the EndpointOption (which defaults to "clouddebugger.googleapis.com") used by MakeDebugger2Connection().
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."],[[["Environment variables can be used to configure the library's behavior, especially useful for troubleshooting, and are alternatives to in-code configuration functions."],["The `GOOGLE_CLOUD_CPP_CONTROLLER2_ENDPOINT` and `GOOGLE_CLOUD_CPP_DEBUGGER2_ENDPOINT` variables can override the default endpoints used by the `MakeController2Connection()` and `MakeDebugger2Connection()` functions, respectively."],["`GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` enables tracing for gRPC calls, with `GOOGLE_CLOUD_CPP_ENABLE_CLOG` needed to produce output on the program's console."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` allows for modification of gRPC tracing behavior, such as controlling message output format and field truncation."],["Setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` activates logging in the library by enabling a backend for the logging infrastructure to print output."]]],[]]
