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_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::TracingComponentsOptionGOOGLE_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 for the network services library is version 2.37.0-rc, and the page includes links to previous versions, ranging down to 2.12.0."],["Environment variables like `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` can override default settings, such as the network services endpoint, for troubleshooting and customization."],["The `GOOGLE_CLOUD_CPP_ENABLE_TRACING` environment variable can enable tracing for gRPC calls, and additional variables can modify the tracing behavior and output format."],["The `GOOGLE_CLOUD_CPP_ENABLE_CLOG` environment variable turns on logging in the library, providing a backend for logging infrastructure that otherwise would not output anything."],["`GOOGLE_CLOUD_PROJECT` can set the default GCP project, which is used in examples and integration testing, but has no effect in the library."]]],[]]
