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_CLUSTER_MANAGER_ENDPOINT=... overrides the EndpointOption (which defaults to "container.googleapis.com") used by MakeClusterManagerConnection().
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 provides a comprehensive list of available versions for the C++ container environment, starting from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Several environment variables are detailed, which can be used to configure the behavior of the library, particularly for troubleshooting, including `GOOGLE_CLOUD_CPP_CLUSTER_MANAGER_ENDPOINT`, `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The document discusses endpoint overrides, with a specific focus on the `GOOGLE_CLOUD_CPP_CLUSTER_MANAGER_ENDPOINT` variable for customizing the default endpoint used by `MakeClusterManagerConnection()`."],["Logging and tracing configurations are outlined, including how to enable gRPC call tracing and modify its behavior through `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, respectively, and how to utilize `GOOGLE_CLOUD_CPP_ENABLE_CLOG` for logging output."],["The `GOOGLE_CLOUD_PROJECT` environment variable is specifically used for setting the GCP project in examples and integration tests, and it does not have any influence on the library itself."]]],[]]
