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_DEP_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "networkservices.googleapis.com") used by MakeDepServiceConnection().
GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "networkservices.googleapis.com") used by MakeNetworkServicesConnection().
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."],[[["The latest release candidate version is 2.37.0-rc, and the most recent stable version is 2.36.0, while the current documentation is for version 2.28.0 with a list of versions available from 2.12.0 through 2.37.0."],["Environment variables can be used to configure library behavior and are particularly useful for troubleshooting, along with the availability of functions to set the same configurations in code."],["The `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` and `GOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT` environment variables allow overriding the default endpoint used by `MakeNetworkServicesConnection()` and `MakeDepServiceConnection()`, respectively."],["Tracing can be enabled for gRPC calls by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and logging can be activated in the library by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`, which will allow output to the program's console."],["Setting `GOOGLE_CLOUD_PROJECT` configures the GCP project in examples and integration tests, but does not directly affect library functionality."]]],[]]
