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_ATTACHED_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_AWS_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
GOOGLE_CLOUD_CPP_AZURE_CLUSTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "
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."],[[["This document provides a comprehensive list of available versions for the GKE Multi-Cloud C++ library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The library's behavior can be customized using various environment variables, which is particularly helpful when debugging or troubleshooting."],["Endpoint overrides for Attached Clusters, AWS Clusters, and Azure Clusters can be configured through environment variables like `GOOGLE_CLOUD_CPP_ATTACHED_CLUSTERS_ENDPOINT`, `GOOGLE_CLOUD_CPP_AWS_CLUSTERS_ENDPOINT`, and `GOOGLE_CLOUD_CPP_AZURE_CLUSTERS_ENDPOINT`, respectively."],["Logging and tracing features in the library can be enabled and modified using environment variables such as `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The `GOOGLE_CLOUD_PROJECT` environment variable is primarily used in examples and integration tests to define the GCP project, and it does not have any direct effect within the library itself."]]],[]]
