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, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Several environment variables, such as `GOOGLE_CLOUD_CPP_CLUSTER_MANAGER_ENDPOINT`, can be set to override default settings or configure specific behaviors of the library, especially for troubleshooting."],["Tracing for gRPC calls can be enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which helps in monitoring gRPC request and response activity, in conjunction with `GOOGLE_CLOUD_CPP_ENABLE_CLOG` for console output."],["Logging behavior within the library is configurable via `GOOGLE_CLOUD_CPP_ENABLE_CLOG` and can be further modified by setting tracing options with `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["While the `GOOGLE_CLOUD_PROJECT` environment variable is used in examples and integration tests for the GCP project, it does not affect the operation of the library itself."]]],[]]
