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_BACKUP_DR_ENDPOINT=... overrides the EndpointOption (which defaults to "backupdr.googleapis.com") used by MakeBackupDRConnection().
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 2025-03-05 UTC."],[[["This page details environment variables and configuration options for the C++ Backup and DR library, with version 2.37.0-rc being the latest."],["Environment variables allow for configuring the library's behavior, particularly useful when troubleshooting, and can be overriden in code as well."],["The `GOOGLE_CLOUD_CPP_BACKUP_DR_ENDPOINT` environment variable can override the default endpoint used by `MakeBackupDRConnection()`."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and detailed tracing options can be configured with `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["The library logging can be activated via `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, and while `GOOGLE_CLOUD_PROJECT` is used in examples and tests, it does not affect the library itself."]]],[]]
