purpose

The purpose of the resource. This field can be either PRIVATE, REGIONAL_MANAGED_PROXY, GLOBAL_MANAGED_PROXY, PRIVATE_SERVICE_CONNECT, PEER_MIGRATION or PRIVATE_NAT. A subnet with purpose set to REGIONAL_MANAGED_PROXY is a user-created subnetwork that is reserved for regional Envoy-based load balancers. A subnetwork in a given region with purpose set to GLOBAL_MANAGED_PROXY is a proxy-only subnet and is shared between all the cross-regional Envoy-based load balancers. A subnetwork with purpose set to PRIVATE_SERVICE_CONNECT reserves the subnet for hosting a Private Service Connect published service. A subnetwork with purpose set to PEER_MIGRATION is a user created subnetwork that is reserved for migrating resources from one peered network to another. A subnetwork with purpose set to PRIVATE_NAT is used as source range for Private NAT gateways. Note that REGIONAL_MANAGED_PROXY is the preferred setting for all regional Envoy load balancers. If unspecified, the purpose defaults to PRIVATE.