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 2025-03-21 UTC."],[[["This page details environment variables and settings for configuring the behavior of the Backup and DR (Disaster Recovery) C++ library, with version history provided."],["The environment variable `GOOGLE_CLOUD_CPP_BACKUP_DR_ENDPOINT` can be used to override the default endpoint used by `MakeBackupDRConnection()`, which defaults to \"backupdr.googleapis.com\"."],["Enabling gRPC tracing is possible by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which will log each gRPC request and response, while also requiring `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to output to the console."],["The behavior of gRPC tracing can be modified with the `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` variable, which allows for customization like message formatting and field truncation."],["The project can be set with the `GOOGLE_CLOUD_PROJECT` environment variable, however, it is only used in examples and integration tests and will have no effect on the library."]]],[]]
