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_EDGE_CONTAINER_ENDPOINT=...overrides theEndpointOption(which defaults to "edgecontainer.googleapis.com") used byMakeEdgeContainerConnection().
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::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 2025-09-04 UTC."],[[["\u003cp\u003eThe latest release candidate version for this library is 2.37.0-rc, with several other versions available, ranging from 2.36.0 down to 2.11.0, for reference and use.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables can be used to override the default endpoint, such as \u003ccode\u003eGOOGLE_CLOUD_CPP_EDGE_CONTAINER_ENDPOINT\u003c/code\u003e for modifying the \u003ccode\u003eEndpointOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be enabled using \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, which logs requests and responses, often requiring \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e to see the output.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e environment variable offers customization of gRPC tracing behaviors, like adjusting message output and field truncation.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e enables logging in the library, which can be used to display logs on the program's console when no other backend is configured.\u003c/p\u003e\n"]]],[],null,["Version 2.15.1keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/edgecontainer/latest/edgecontainer-env)\n- [2.41.0](/cpp/docs/reference/edgecontainer/2.41.0/edgecontainer-env)\n- [2.40.0](/cpp/docs/reference/edgecontainer/2.40.0/edgecontainer-env)\n- [2.39.0](/cpp/docs/reference/edgecontainer/2.39.0/edgecontainer-env)\n- [2.38.0](/cpp/docs/reference/edgecontainer/2.38.0/edgecontainer-env)\n- [2.37.0](/cpp/docs/reference/edgecontainer/2.37.0/edgecontainer-env)\n- [2.36.0](/cpp/docs/reference/edgecontainer/2.36.0/edgecontainer-env)\n- [2.35.0](/cpp/docs/reference/edgecontainer/2.35.0/edgecontainer-env)\n- [2.34.0](/cpp/docs/reference/edgecontainer/2.34.0/edgecontainer-env)\n- [2.33.0](/cpp/docs/reference/edgecontainer/2.33.0/edgecontainer-env)\n- [2.32.0](/cpp/docs/reference/edgecontainer/2.32.0/edgecontainer-env)\n- [2.31.0](/cpp/docs/reference/edgecontainer/2.31.0/edgecontainer-env)\n- [2.30.0](/cpp/docs/reference/edgecontainer/2.30.0/edgecontainer-env)\n- [2.29.0](/cpp/docs/reference/edgecontainer/2.29.0/edgecontainer-env)\n- [2.28.0](/cpp/docs/reference/edgecontainer/2.28.0/edgecontainer-env)\n- [2.27.0](/cpp/docs/reference/edgecontainer/2.27.0/edgecontainer-env)\n- [2.26.0](/cpp/docs/reference/edgecontainer/2.26.0/edgecontainer-env)\n- [2.25.1](/cpp/docs/reference/edgecontainer/2.25.1/edgecontainer-env)\n- [2.24.0](/cpp/docs/reference/edgecontainer/2.24.0/edgecontainer-env)\n- [2.23.0](/cpp/docs/reference/edgecontainer/2.23.0/edgecontainer-env)\n- [2.22.1](/cpp/docs/reference/edgecontainer/2.22.1/edgecontainer-env)\n- [2.21.0](/cpp/docs/reference/edgecontainer/2.21.0/edgecontainer-env)\n- [2.20.0](/cpp/docs/reference/edgecontainer/2.20.0/edgecontainer-env)\n- [2.19.0](/cpp/docs/reference/edgecontainer/2.19.0/edgecontainer-env)\n- [2.18.0](/cpp/docs/reference/edgecontainer/2.18.0/edgecontainer-env)\n- [2.17.0](/cpp/docs/reference/edgecontainer/2.17.0/edgecontainer-env)\n- [2.16.0](/cpp/docs/reference/edgecontainer/2.16.0/edgecontainer-env)\n- [2.15.1](/cpp/docs/reference/edgecontainer/2.15.1/edgecontainer-env)\n- [2.14.0](/cpp/docs/reference/edgecontainer/2.14.0/edgecontainer-env)\n- [2.13.0](/cpp/docs/reference/edgecontainer/2.13.0/edgecontainer-env)\n- [2.12.0](/cpp/docs/reference/edgecontainer/2.12.0/edgecontainer-env)\n- [2.11.0](/cpp/docs/reference/edgecontainer/2.11.0/edgecontainer-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_EDGE_CONTAINER_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"edgecontainer.googleapis.com\") used by `MakeEdgeContainerConnection()`.\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::TracingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1TracingComponentsOption.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."]]
