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_SECURITY_ENDPOINT=... overrides the EndpointOption (which defaults to "networksecurity.googleapis.com") used by MakeNetworkSecurityConnection().
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 2025-03-05 UTC."],[[["The latest release candidate version for this content is 2.37.0-rc, with the current version being 2.28.0, and it includes a list of previous versions ranging from 2.36.0 down to 2.13.0."],["Environment variables are available for configuring library behavior, especially useful for troubleshooting, such as overriding the endpoint using `GOOGLE_CLOUD_CPP_NETWORK_SECURITY_ENDPOINT`."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and logging can be activated by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` allows modification of gRPC tracing behavior, such as formatting and truncation of string/bytes fields."],["`GOOGLE_CLOUD_PROJECT` can be set to define the GCP project, mainly for examples and integration tests."]]],[]]
