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_SERVICE_HEALTH_ENDPOINT=... overrides the EndpointOption (which defaults to "servicehealth.googleapis.com") used by MakeServiceHealthConnection().
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."],[[["This document details environment variables and version history for configuring the behavior of the service health C++ library, specifically focusing on troubleshooting and logging."],["The library's endpoint can be overridden using the `GOOGLE_CLOUD_CPP_SERVICE_HEALTH_ENDPOINT` environment variable, allowing for custom endpoints instead of the default \"servicehealth.googleapis.com\"."],["Tracing and logging can be enabled for gRPC calls by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc` and `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` respectively, with additional options available for customizing the tracing output."],["The `GOOGLE_CLOUD_PROJECT` environment variable is used for examples and tests to set the GCP project, but it does not affect the library's operation."],["The latest version of the service health C++ library is `2.37.0-rc`, with version history provided back to `2.21.0`."]]],[]]
