Environment Variables

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_ACCELERATOR_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeAcceleratorTypesConnection().
  • GOOGLE_CLOUD_CPP_ADDRESSES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeAddressesConnection().
  • GOOGLE_CLOUD_CPP_AUTOSCALERS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeAutoscalersConnection().
  • GOOGLE_CLOUD_CPP_BACKEND_BUCKETS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeBackendBucketsConnection().
  • GOOGLE_CLOUD_CPP_BACKEND_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeBackendServicesConnection().
  • GOOGLE_CLOUD_CPP_DISKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeDisksConnection().
  • GOOGLE_CLOUD_CPP_DISK_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeDiskTypesConnection().
  • GOOGLE_CLOUD_CPP_EXTERNAL_VPN_GATEWAYS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeExternalVpnGatewaysConnection().
  • GOOGLE_CLOUD_CPP_FIREWALLS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeFirewallsConnection().
  • GOOGLE_CLOUD_CPP_FIREWALL_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeFirewallPoliciesConnection().
  • GOOGLE_CLOUD_CPP_FORWARDING_RULES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeForwardingRulesConnection().
  • GOOGLE_CLOUD_CPP_FUTURE_RESERVATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeFutureReservationsConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_ADDRESSES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalAddressesConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_FORWARDING_RULES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalForwardingRulesConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_NETWORK_ENDPOINT_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalNetworkEndpointGroupsConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_OPERATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalOperationsConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_ORGANIZATION_OPERATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalOrganizationOperationsConnection().
  • GOOGLE_CLOUD_CPP_GLOBAL_PUBLIC_DELEGATED_PREFIXES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeGlobalPublicDelegatedPrefixesConnection().
  • GOOGLE_CLOUD_CPP_HEALTH_CHECKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeHealthChecksConnection().
  • GOOGLE_CLOUD_CPP_HTTPS_HEALTH_CHECKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeHttpsHealthChecksConnection().
  • GOOGLE_CLOUD_CPP_HTTP_HEALTH_CHECKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeHttpHealthChecksConnection().
  • GOOGLE_CLOUD_CPP_IMAGES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeImagesConnection().
  • GOOGLE_CLOUD_CPP_IMAGE_FAMILY_VIEWS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeImageFamilyViewsConnection().
  • GOOGLE_CLOUD_CPP_INSTANCES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstancesConnection().
  • GOOGLE_CLOUD_CPP_INSTANCE_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstanceGroupsConnection().
  • GOOGLE_CLOUD_CPP_INSTANCE_GROUP_MANAGERS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstanceGroupManagersConnection().
  • GOOGLE_CLOUD_CPP_INSTANCE_GROUP_MANAGER_RESIZE_REQUESTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstanceGroupManagerResizeRequestsConnection().
  • GOOGLE_CLOUD_CPP_INSTANCE_SETTINGS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstanceSettingsConnection().
  • GOOGLE_CLOUD_CPP_INSTANCE_TEMPLATES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstanceTemplatesConnection().
  • GOOGLE_CLOUD_CPP_INSTANT_SNAPSHOTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInstantSnapshotsConnection().
  • GOOGLE_CLOUD_CPP_INTERCONNECTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInterconnectsConnection().
  • GOOGLE_CLOUD_CPP_INTERCONNECT_ATTACHMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInterconnectAttachmentsConnection().
  • GOOGLE_CLOUD_CPP_INTERCONNECT_LOCATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInterconnectLocationsConnection().
  • GOOGLE_CLOUD_CPP_INTERCONNECT_REMOTE_LOCATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeInterconnectRemoteLocationsConnection().
  • GOOGLE_CLOUD_CPP_LICENSES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeLicensesConnection().
  • GOOGLE_CLOUD_CPP_LICENSE_CODES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeLicenseCodesConnection().
  • GOOGLE_CLOUD_CPP_MACHINE_IMAGES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeMachineImagesConnection().
  • GOOGLE_CLOUD_CPP_MACHINE_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeMachineTypesConnection().
  • GOOGLE_CLOUD_CPP_NETWORKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNetworksConnection().
  • GOOGLE_CLOUD_CPP_NETWORK_ATTACHMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNetworkAttachmentsConnection().
  • GOOGLE_CLOUD_CPP_NETWORK_EDGE_SECURITY_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNetworkEdgeSecurityServicesConnection().
  • GOOGLE_CLOUD_CPP_NETWORK_ENDPOINT_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNetworkEndpointGroupsConnection().
  • GOOGLE_CLOUD_CPP_NETWORK_FIREWALL_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNetworkFirewallPoliciesConnection().
  • GOOGLE_CLOUD_CPP_NODE_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNodeGroupsConnection().
  • GOOGLE_CLOUD_CPP_NODE_TEMPLATES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNodeTemplatesConnection().
  • GOOGLE_CLOUD_CPP_NODE_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeNodeTypesConnection().
  • GOOGLE_CLOUD_CPP_PACKET_MIRRORINGS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakePacketMirroringsConnection().
  • GOOGLE_CLOUD_CPP_PROJECTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeProjectsConnection().
  • GOOGLE_CLOUD_CPP_PUBLIC_ADVERTISED_PREFIXES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakePublicAdvertisedPrefixesConnection().
  • GOOGLE_CLOUD_CPP_PUBLIC_DELEGATED_PREFIXES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakePublicDelegatedPrefixesConnection().
  • GOOGLE_CLOUD_CPP_REGIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionsConnection().
  • GOOGLE_CLOUD_CPP_REGION_AUTOSCALERS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionAutoscalersConnection().
  • GOOGLE_CLOUD_CPP_REGION_BACKEND_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionBackendServicesConnection().
  • GOOGLE_CLOUD_CPP_REGION_COMMITMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionCommitmentsConnection().
  • GOOGLE_CLOUD_CPP_REGION_DISKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionDisksConnection().
  • GOOGLE_CLOUD_CPP_REGION_DISK_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionDiskTypesConnection().
  • GOOGLE_CLOUD_CPP_REGION_HEALTH_CHECKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionHealthChecksConnection().
  • GOOGLE_CLOUD_CPP_REGION_HEALTH_CHECK_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionHealthCheckServicesConnection().
  • GOOGLE_CLOUD_CPP_REGION_INSTANCES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionInstancesConnection().
  • GOOGLE_CLOUD_CPP_REGION_INSTANCE_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionInstanceGroupsConnection().
  • GOOGLE_CLOUD_CPP_REGION_INSTANCE_GROUP_MANAGERS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionInstanceGroupManagersConnection().
  • GOOGLE_CLOUD_CPP_REGION_INSTANCE_TEMPLATES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionInstanceTemplatesConnection().
  • GOOGLE_CLOUD_CPP_REGION_INSTANT_SNAPSHOTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionInstantSnapshotsConnection().
  • GOOGLE_CLOUD_CPP_REGION_NETWORK_ENDPOINT_GROUPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionNetworkEndpointGroupsConnection().
  • GOOGLE_CLOUD_CPP_REGION_NETWORK_FIREWALL_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionNetworkFirewallPoliciesConnection().
  • GOOGLE_CLOUD_CPP_REGION_NOTIFICATION_ENDPOINTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionNotificationEndpointsConnection().
  • GOOGLE_CLOUD_CPP_REGION_OPERATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionOperationsConnection().
  • GOOGLE_CLOUD_CPP_REGION_SECURITY_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionSecurityPoliciesConnection().
  • GOOGLE_CLOUD_CPP_REGION_SSL_CERTIFICATES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionSslCertificatesConnection().
  • GOOGLE_CLOUD_CPP_REGION_SSL_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionSslPoliciesConnection().
  • GOOGLE_CLOUD_CPP_REGION_TARGET_HTTPS_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionTargetHttpsProxiesConnection().
  • GOOGLE_CLOUD_CPP_REGION_TARGET_HTTP_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionTargetHttpProxiesConnection().
  • GOOGLE_CLOUD_CPP_REGION_TARGET_TCP_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionTargetTcpProxiesConnection().
  • GOOGLE_CLOUD_CPP_REGION_URL_MAPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionUrlMapsConnection().
  • GOOGLE_CLOUD_CPP_REGION_ZONES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRegionZonesConnection().
  • GOOGLE_CLOUD_CPP_RESERVATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeReservationsConnection().
  • GOOGLE_CLOUD_CPP_RESOURCE_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeResourcePoliciesConnection().
  • GOOGLE_CLOUD_CPP_ROUTERS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRoutersConnection().
  • GOOGLE_CLOUD_CPP_ROUTES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeRoutesConnection().
  • GOOGLE_CLOUD_CPP_SECURITY_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSecurityPoliciesConnection().
  • GOOGLE_CLOUD_CPP_SERVICE_ATTACHMENTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeServiceAttachmentsConnection().
  • GOOGLE_CLOUD_CPP_SNAPSHOTS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSnapshotsConnection().
  • GOOGLE_CLOUD_CPP_SNAPSHOT_SETTINGS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSnapshotSettingsConnection().
  • GOOGLE_CLOUD_CPP_SSL_CERTIFICATES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSslCertificatesConnection().
  • GOOGLE_CLOUD_CPP_SSL_POLICIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSslPoliciesConnection().
  • GOOGLE_CLOUD_CPP_STORAGE_POOLS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeStoragePoolsConnection().
  • GOOGLE_CLOUD_CPP_STORAGE_POOL_TYPES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeStoragePoolTypesConnection().
  • GOOGLE_CLOUD_CPP_SUBNETWORKS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeSubnetworksConnection().
  • GOOGLE_CLOUD_CPP_TARGET_GRPC_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetGrpcProxiesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_HTTPS_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetHttpsProxiesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_HTTP_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetHttpProxiesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_INSTANCES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetInstancesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_POOLS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetPoolsConnection().
  • GOOGLE_CLOUD_CPP_TARGET_SSL_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetSslProxiesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_TCP_PROXIES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetTcpProxiesConnection().
  • GOOGLE_CLOUD_CPP_TARGET_VPN_GATEWAYS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeTargetVpnGatewaysConnection().
  • GOOGLE_CLOUD_CPP_URL_MAPS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeUrlMapsConnection().
  • GOOGLE_CLOUD_CPP_VPN_GATEWAYS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeVpnGatewaysConnection().
  • GOOGLE_CLOUD_CPP_VPN_TUNNELS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeVpnTunnelsConnection().
  • GOOGLE_CLOUD_CPP_ZONES_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeZonesConnection().
  • GOOGLE_CLOUD_CPP_ZONE_OPERATIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "compute.googleapis.com") used by MakeZoneOperationsConnection().
See Also

google::cloud::EndpointOption

Logging

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::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:☁️:TracingOptionsOptionGOOGLE_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.

See Also

google::cloud::LogBackend

See Also

google::cloud::LogSink

Setting the Default Project

GOOGLE_CLOUD_PROJECT=...: is used in examples and integration tests to configure the GCP project. This has no effect in the library.