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_CONTAINER_ANALYSIS_ENDPOINT=...overrides theEndpointOption(which defaults to "containeranalysis.googleapis.com") used byMakeContainerAnalysisConnection().
GOOGLE_CLOUD_CPP_GRAFEAS_ENDPOINT=...overrides theEndpointOption(which defaults to "containeranalysis.googleapis.com") used byMakeGrafeasConnection().
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 documentation is 2.37.0-rc, with several other versions available, ranging from 2.36.0 down to 2.11.0, and each version has it's own documentation.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables are available to configure the library's behavior and are particularly useful for troubleshooting, and functions also allow this behavior to be configured in code.\u003c/p\u003e\n"],["\u003cp\u003eYou can override the default endpoint used by \u003ccode\u003eMakeContainerAnalysisConnection()\u003c/code\u003e and \u003ccode\u003eMakeGrafeasConnection()\u003c/code\u003e using \u003ccode\u003eGOOGLE_CLOUD_CPP_CONTAINER_ANALYSIS_ENDPOINT\u003c/code\u003e and \u003ccode\u003eGOOGLE_CLOUD_CPP_GRAFEAS_ENDPOINT\u003c/code\u003e, respectively.\u003c/p\u003e\n"],["\u003cp\u003eEnabling tracing for gRPC calls can be done by setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, and logging can be enabled via \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e, for monitoring the request and response of the gRPC calls.\u003c/p\u003e\n"],["\u003cp\u003eSetting the \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e enviornment variable will configure the GCP project for integration tests, but it has no effect in the library.\u003c/p\u003e\n"]]],[],null,["Version 2.19.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/containeranalysis/latest/containeranalysis-env)\n- [2.41.0](/cpp/docs/reference/containeranalysis/2.41.0/containeranalysis-env)\n- [2.40.0](/cpp/docs/reference/containeranalysis/2.40.0/containeranalysis-env)\n- [2.39.0](/cpp/docs/reference/containeranalysis/2.39.0/containeranalysis-env)\n- [2.38.0](/cpp/docs/reference/containeranalysis/2.38.0/containeranalysis-env)\n- [2.37.0](/cpp/docs/reference/containeranalysis/2.37.0/containeranalysis-env)\n- [2.36.0](/cpp/docs/reference/containeranalysis/2.36.0/containeranalysis-env)\n- [2.35.0](/cpp/docs/reference/containeranalysis/2.35.0/containeranalysis-env)\n- [2.34.0](/cpp/docs/reference/containeranalysis/2.34.0/containeranalysis-env)\n- [2.33.0](/cpp/docs/reference/containeranalysis/2.33.0/containeranalysis-env)\n- [2.32.0](/cpp/docs/reference/containeranalysis/2.32.0/containeranalysis-env)\n- [2.31.0](/cpp/docs/reference/containeranalysis/2.31.0/containeranalysis-env)\n- [2.30.0](/cpp/docs/reference/containeranalysis/2.30.0/containeranalysis-env)\n- [2.29.0](/cpp/docs/reference/containeranalysis/2.29.0/containeranalysis-env)\n- [2.28.0](/cpp/docs/reference/containeranalysis/2.28.0/containeranalysis-env)\n- [2.27.0](/cpp/docs/reference/containeranalysis/2.27.0/containeranalysis-env)\n- [2.26.0](/cpp/docs/reference/containeranalysis/2.26.0/containeranalysis-env)\n- [2.25.1](/cpp/docs/reference/containeranalysis/2.25.1/containeranalysis-env)\n- [2.24.0](/cpp/docs/reference/containeranalysis/2.24.0/containeranalysis-env)\n- [2.23.0](/cpp/docs/reference/containeranalysis/2.23.0/containeranalysis-env)\n- [2.22.1](/cpp/docs/reference/containeranalysis/2.22.1/containeranalysis-env)\n- [2.21.0](/cpp/docs/reference/containeranalysis/2.21.0/containeranalysis-env)\n- [2.20.0](/cpp/docs/reference/containeranalysis/2.20.0/containeranalysis-env)\n- [2.19.0](/cpp/docs/reference/containeranalysis/2.19.0/containeranalysis-env)\n- [2.18.0](/cpp/docs/reference/containeranalysis/2.18.0/containeranalysis-env)\n- [2.17.0](/cpp/docs/reference/containeranalysis/2.17.0/containeranalysis-env)\n- [2.16.0](/cpp/docs/reference/containeranalysis/2.16.0/containeranalysis-env)\n- [2.15.1](/cpp/docs/reference/containeranalysis/2.15.1/containeranalysis-env)\n- [2.14.0](/cpp/docs/reference/containeranalysis/2.14.0/containeranalysis-env)\n- [2.13.0](/cpp/docs/reference/containeranalysis/2.13.0/containeranalysis-env)\n- [2.12.0](/cpp/docs/reference/containeranalysis/2.12.0/containeranalysis-env)\n- [2.11.0](/cpp/docs/reference/containeranalysis/2.11.0/containeranalysis-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_CONTAINER_ANALYSIS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"containeranalysis.googleapis.com\") used by `MakeContainerAnalysisConnection()`.\n- `GOOGLE_CLOUD_CPP_GRAFEAS_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"containeranalysis.googleapis.com\") used by `MakeGrafeasConnection()`.\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."]]
