sourceRegions

The list of cloud regions from which health checks are performed. If any regions are specified, then exactly 3 regions should be specified. The region names must be valid names of Google Cloud regions. This can only be set for global health check. If this list is non-empty, then there are restrictions on what other health check fields are supported and what other resources can use this health check:

• SSL, HTTP2, and GRPC protocols are not supported.

• The TCP request field is not supported.

• The proxyHeader field for HTTP, HTTPS, and TCP is not supported.

• The checkIntervalSec field must be at least 30.

• The health check cannot be used with BackendService nor with managed instance group auto-healing.