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_RAPID_MIGRATION_ASSESSMENT_ENDPOINT=... overrides the EndpointOption (which defaults to "rapidmigrationassessment.googleapis.com") used by MakeRapidMigrationAssessmentConnection().
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 2025-03-14 UTC."],[[["This document lists available versions of the Rapid Migration Assessment environment, ranging from version 2.13.0 up to the latest release candidate, 2.37.0-rc."],["Environment variables, such as `GOOGLE_CLOUD_CPP_RAPID_MIGRATION_ASSESSMENT_ENDPOINT`, can override default settings for library behavior, including the gRPC endpoint."],["The `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` variable enables tracing for gRPC calls, allowing for detailed logging of requests and responses when used in conjunction with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["Logging can be activated in the library by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, which enables the output of log data to the program's console."],["`GOOGLE_CLOUD_PROJECT` can be used to set the default project, however it does not have an effect within the library, only in the examples and integration tests."]]],[]]
