def create_host(id, cpu, mem, disk, constraint_set, overcommit):
from psim.universe import Universe
networks = [constraint
for constraint in constraint_set
if constraint.type == RCT.NETWORK]
datastores = [constraint
for constraint in constraint_set
if constraint.type == RCT.DATASTORE]
if not networks:
# create a dummy network so host handler doesn't throw warnings
networks.append(ResourceConstraint(RCT.NETWORK, ["VM Network"]))
local_ds_name = Universe.add_local_ds(id, disk)
datastores.append(ResourceConstraint(RCT.DATASTORE, [local_ds_name]))
host = Host(id, networks, datastores, cpu, mem, disk, overcommit)
return host
