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_CLOUD_TASKS_ENDPOINT=...overrides theEndpointOption(which defaults to "cloudtasks.googleapis.com") used byMakeCloudTasksConnection().
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 setGOOGLE_CLOUD_CPP_ENABLE_CLOGto 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 2025-09-04 UTC."],[[["\u003cp\u003eThis document provides a comprehensive list of past versions of the Cloud Tasks C++ library, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc, and including a current version of 2.30.0.\u003c/p\u003e\n"],["\u003cp\u003eThe behavior of the Cloud Tasks C++ library can be configured via environment variables, which can be particularly useful when troubleshooting any potential issues.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables like \u003ccode\u003eGOOGLE_CLOUD_CPP_CLOUD_TASKS_ENDPOINT\u003c/code\u003e allow for overriding the default endpoint used by \u003ccode\u003eMakeCloudTasksConnection()\u003c/code\u003e, while \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e enable and modify gRPC tracing.\u003c/p\u003e\n"],["\u003cp\u003eLogging can be enabled using the environment variable \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e or by configuring a custom logging backend, allowing for detailed monitoring of library behavior.\u003c/p\u003e\n"],["\u003cp\u003eThere is also a default project setting \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e that can be used in examples and integration tests.\u003c/p\u003e\n"]]],[],null,["Version 2.30.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/tasks/latest/tasks-env)\n- [2.41.0](/cpp/docs/reference/tasks/2.41.0/tasks-env)\n- [2.40.0](/cpp/docs/reference/tasks/2.40.0/tasks-env)\n- [2.39.0](/cpp/docs/reference/tasks/2.39.0/tasks-env)\n- [2.38.0](/cpp/docs/reference/tasks/2.38.0/tasks-env)\n- [2.37.0](/cpp/docs/reference/tasks/2.37.0/tasks-env)\n- [2.36.0](/cpp/docs/reference/tasks/2.36.0/tasks-env)\n- [2.35.0](/cpp/docs/reference/tasks/2.35.0/tasks-env)\n- [2.34.0](/cpp/docs/reference/tasks/2.34.0/tasks-env)\n- [2.33.0](/cpp/docs/reference/tasks/2.33.0/tasks-env)\n- [2.32.0](/cpp/docs/reference/tasks/2.32.0/tasks-env)\n- [2.31.0](/cpp/docs/reference/tasks/2.31.0/tasks-env)\n- [2.30.0](/cpp/docs/reference/tasks/2.30.0/tasks-env)\n- [2.29.0](/cpp/docs/reference/tasks/2.29.0/tasks-env)\n- [2.28.0](/cpp/docs/reference/tasks/2.28.0/tasks-env)\n- [2.27.0](/cpp/docs/reference/tasks/2.27.0/tasks-env)\n- [2.26.0](/cpp/docs/reference/tasks/2.26.0/tasks-env)\n- [2.25.1](/cpp/docs/reference/tasks/2.25.1/tasks-env)\n- [2.24.0](/cpp/docs/reference/tasks/2.24.0/tasks-env)\n- [2.23.0](/cpp/docs/reference/tasks/2.23.0/tasks-env)\n- [2.22.1](/cpp/docs/reference/tasks/2.22.1/tasks-env)\n- [2.21.0](/cpp/docs/reference/tasks/2.21.0/tasks-env)\n- [2.20.0](/cpp/docs/reference/tasks/2.20.0/tasks-env)\n- [2.19.0](/cpp/docs/reference/tasks/2.19.0/tasks-env)\n- [2.18.0](/cpp/docs/reference/tasks/2.18.0/tasks-env)\n- [2.17.0](/cpp/docs/reference/tasks/2.17.0/tasks-env)\n- [2.16.0](/cpp/docs/reference/tasks/2.16.0/tasks-env)\n- [2.15.1](/cpp/docs/reference/tasks/2.15.1/tasks-env)\n- [2.14.0](/cpp/docs/reference/tasks/2.14.0/tasks-env)\n- [2.13.0](/cpp/docs/reference/tasks/2.13.0/tasks-env)\n- [2.12.0](/cpp/docs/reference/tasks/2.12.0/tasks-env)\n- [2.11.0](/cpp/docs/reference/tasks/2.11.0/tasks-env) \n\nEnvironment Variables\n=====================\n\nA 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.\n\nEndpoint Overrides\n------------------\n\n- `GOOGLE_CLOUD_CPP_CLOUD_TASKS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"cloudtasks.googleapis.com\") used by `MakeCloudTasksConnection()`.\n\n###### See Also\n\n[`google::cloud::EndpointOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html)\n\nLogging\n-------\n\n`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.\n\n###### See Also\n\n[`google::cloud::LoggingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1LoggingComponentsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::GrpcTracingOptionsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcTracingOptionsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::LogBackend`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogBackend.html)\n\n###### See Also\n\n[`google::cloud::LogSink`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogSink.html)\n\nSetting the Default Project\n---------------------------\n\n`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to configure the GCP project. This has no effect in the library."]]
