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_EXECUTIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeExecutionsConnection().
GOOGLE_CLOUD_CPP_JOBS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeJobsConnection().
GOOGLE_CLOUD_CPP_REVISIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeRevisionsConnection().
GOOGLE_CLOUD_CPP_RUN_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeServicesConnection().
GOOGLE_CLOUD_CPP_TASKS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeTasksConnection().
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 2025-03-21 UTC."],[[["This page provides documentation for various versions of the C++ library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, with each version linking to its corresponding run environment documentation."],["Environment variables like `GOOGLE_CLOUD_CPP_EXECUTIONS_ENDPOINT` and others can be used to override default endpoint options for different connections, such as Executions, Jobs, Revisions, Services, and Tasks, all of which default to \"run.googleapis.com\"."],["Tracing for gRPC calls can be enabled by setting `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and this can be coupled with `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to have the output printed to the program's console."],["The behavior of gRPC tracing can be further modified using `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, offering control over output formatting and field truncation, and logging in the library can be turned on with `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`."],["The `GOOGLE_CLOUD_PROJECT` variable is used in examples and integration testing, to configure the GCP project, however it does not have any effect on the library."]]],[]]
