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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 OverridesGOOGLE_CLOUD_CPP_CLOUD_BUILD_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudbuild.googleapis.com") used by MakeCloudBuildConnection().GOOGLE_CLOUD_CPP_REPOSITORY_MANAGER_ENDPOINT=... overrides the EndpointOption (which defaults to "cloudbuild.googleapis.com") used by MakeRepositoryManagerConnection().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.
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.
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.
GOOGLE_CLOUD_PROJECT=...: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["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 2025-08-14 UTC."],[[["The latest release candidate version is 2.37.0-rc, and multiple versions are available, ranging from 2.11.0 to 2.36.0, with the most recent stable version being 2.36.0."],["Environment variables can be used to customize library behavior, which is particularly useful for troubleshooting purposes, with options for endpoints, tracing, and logging."],["The `GOOGLE_CLOUD_CPP_CLOUD_BUILD_ENDPOINT` and `GOOGLE_CLOUD_CPP_REPOSITORY_MANAGER_ENDPOINT` variables allow overriding the default endpoints for Cloud Build and Repository Manager connections, respectively."],["Tracing for gRPC calls can be enabled via `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and detailed logging can be activated by setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`."],["The environment variable `GOOGLE_CLOUD_PROJECT` is used for examples and integration tests to specify the GCP project, but it does not affect the library's internal operations."]]],[]]
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