You can view all of your currently running leases with
engine lease list.
When leased machines are still provisioning, they will show how many machines have been provisioned.
When leased machines are done provisioning, they will show how many are running and how long they
have left to run.
engine lease list "lease-1-1559757945" for 1x p2.xlarge instances is starting (0/1 instances are ready). "lease-1-1559757406" for 2x p2.8xlarge instances will finish in 15 minutes.