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_PARAMETER_MANAGER_ENDPOINT=... overrides the EndpointOption (which defaults to "parametermanager.googleapis.com") used by MakeParameterManagerConnection().
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::LoggingComponentsOptionGOOGLE_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 2025-04-23 UTC."],[[["This page outlines environment variables that can be used to configure the behavior of the Parameter Manager C++ library, which are particularly useful for troubleshooting."],["`GOOGLE_CLOUD_CPP_PARAMETER_MANAGER_ENDPOINT` allows you to override the default endpoint used by `MakeParameterManagerConnection()`."],["`GOOGLE_CLOUD_CPP_ENABLE_TRACING` enables tracing for gRPC calls, printing request and response information, and typically needs `GOOGLE_CLOUD_CPP_ENABLE_CLOG` set as well."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` modifies the behavior of gRPC tracing, allowing customization of how messages are output and whether string/bytes are truncated."],["`GOOGLE_CLOUD_CPP_ENABLE_CLOG` turns on logging in the library, enabling the logging infrastructure to print output."]]],[]]
