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::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 2025-03-14 UTC."],[[["The latest release candidate version for network services is 2.37.0-rc, with a comprehensive list of versions from 2.36.0 down to 2.12.0 being available."],["Environment variables like `GOOGLE_CLOUD_CPP_DEP_SERVICE_ENDPOINT` and `GOOGLE_CLOUD_CPP_NETWORK_SERVICES_ENDPOINT` allow users to override default endpoint settings for network services."],["Tracing can be enabled for gRPC calls by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and output can be directed to the console by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can be used to modify how gRPC tracing behaves."],["Setting `GOOGLE_CLOUD_PROJECT` in the environment configures the GCP project for examples and tests but has no effect on the library itself."]]],[]]
