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_ALERT_POLICY_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeAlertPolicyServiceConnection().
GOOGLE_CLOUD_CPP_DASHBOARDS_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeDashboardsServiceConnection().
GOOGLE_CLOUD_CPP_GROUP_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeGroupServiceConnection().
GOOGLE_CLOUD_CPP_METRICS_SCOPES_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeMetricsScopesConnection().
GOOGLE_CLOUD_CPP_METRIC_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeMetricServiceConnection().
GOOGLE_CLOUD_CPP_NOTIFICATION_CHANNEL_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeNotificationChannelServiceConnection().
GOOGLE_CLOUD_CPP_QUERY_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeQueryServiceConnection().
GOOGLE_CLOUD_CPP_SERVICE_MONITORING_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeServiceMonitoringServiceConnection().
GOOGLE_CLOUD_CPP_SNOOZE_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeSnoozeServiceConnection().
GOOGLE_CLOUD_CPP_UPTIME_CHECK_SERVICE_ENDPOINT=...overrides theEndpointOption(which defaults to "monitoring.googleapis.com") used byMakeUptimeCheckServiceConnection().
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\u003eThis document provides a comprehensive list of versioned monitoring documentation, starting from version 2.11.0 up to the latest release candidate, 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eEnvironment variables, including \u003ccode\u003eGOOGLE_CLOUD_CPP_ALERT_POLICY_SERVICE_ENDPOINT\u003c/code\u003e, can be used to override the default endpoint for various monitoring services like Alert Policy, Dashboards, Groups, and others.\u003c/p\u003e\n"],["\u003cp\u003eTracing for gRPC calls can be enabled by setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, which, along with \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e, will output request and response logs to the console.\u003c/p\u003e\n"],["\u003cp\u003eThe behavior of gRPC tracing, including formatting options like multi-line output and string/bytes truncation, can be modified using \u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e will enable logging within the library, allowing for the display of logs, and \u003ccode\u003eGOOGLE_CLOUD_PROJECT\u003c/code\u003e is only used for examples and integration tests and has no effect on the library.\u003c/p\u003e\n"]]],[],null,["Version 2.21.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/monitoring/latest/monitoring-env)\n- [2.41.0](/cpp/docs/reference/monitoring/2.41.0/monitoring-env)\n- [2.40.0](/cpp/docs/reference/monitoring/2.40.0/monitoring-env)\n- [2.39.0](/cpp/docs/reference/monitoring/2.39.0/monitoring-env)\n- [2.38.0](/cpp/docs/reference/monitoring/2.38.0/monitoring-env)\n- [2.37.0](/cpp/docs/reference/monitoring/2.37.0/monitoring-env)\n- [2.36.0](/cpp/docs/reference/monitoring/2.36.0/monitoring-env)\n- [2.35.0](/cpp/docs/reference/monitoring/2.35.0/monitoring-env)\n- [2.34.0](/cpp/docs/reference/monitoring/2.34.0/monitoring-env)\n- [2.33.0](/cpp/docs/reference/monitoring/2.33.0/monitoring-env)\n- [2.32.0](/cpp/docs/reference/monitoring/2.32.0/monitoring-env)\n- [2.31.0](/cpp/docs/reference/monitoring/2.31.0/monitoring-env)\n- [2.30.0](/cpp/docs/reference/monitoring/2.30.0/monitoring-env)\n- [2.29.0](/cpp/docs/reference/monitoring/2.29.0/monitoring-env)\n- [2.28.0](/cpp/docs/reference/monitoring/2.28.0/monitoring-env)\n- [2.27.0](/cpp/docs/reference/monitoring/2.27.0/monitoring-env)\n- [2.26.0](/cpp/docs/reference/monitoring/2.26.0/monitoring-env)\n- [2.25.1](/cpp/docs/reference/monitoring/2.25.1/monitoring-env)\n- [2.24.0](/cpp/docs/reference/monitoring/2.24.0/monitoring-env)\n- [2.23.0](/cpp/docs/reference/monitoring/2.23.0/monitoring-env)\n- [2.22.1](/cpp/docs/reference/monitoring/2.22.1/monitoring-env)\n- [2.21.0](/cpp/docs/reference/monitoring/2.21.0/monitoring-env)\n- [2.20.0](/cpp/docs/reference/monitoring/2.20.0/monitoring-env)\n- [2.19.0](/cpp/docs/reference/monitoring/2.19.0/monitoring-env)\n- [2.18.0](/cpp/docs/reference/monitoring/2.18.0/monitoring-env)\n- [2.17.0](/cpp/docs/reference/monitoring/2.17.0/monitoring-env)\n- [2.16.0](/cpp/docs/reference/monitoring/2.16.0/monitoring-env)\n- [2.15.1](/cpp/docs/reference/monitoring/2.15.1/monitoring-env)\n- [2.14.0](/cpp/docs/reference/monitoring/2.14.0/monitoring-env)\n- [2.13.0](/cpp/docs/reference/monitoring/2.13.0/monitoring-env)\n- [2.12.0](/cpp/docs/reference/monitoring/2.12.0/monitoring-env)\n- [2.11.0](/cpp/docs/reference/monitoring/2.11.0/monitoring-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_ALERT_POLICY_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeAlertPolicyServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_DASHBOARDS_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeDashboardsServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_GROUP_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeGroupServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_METRICS_SCOPES_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeMetricsScopesConnection()`.\n- `GOOGLE_CLOUD_CPP_METRIC_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeMetricServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_NOTIFICATION_CHANNEL_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeNotificationChannelServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_QUERY_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeQueryServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_SERVICE_MONITORING_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeServiceMonitoringServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_SNOOZE_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeSnoozeServiceConnection()`.\n- `GOOGLE_CLOUD_CPP_UPTIME_CHECK_SERVICE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"monitoring.googleapis.com\") used by `MakeUptimeCheckServiceConnection()`.\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."]]
