if i have instances with 2 deployments, how can i get the 2 IPS of the host?

[junneyang]

nova-net example:

my_host:
type: nscloud.nodes.MonitoredServer

###########################################################
# Setting the nodejs_host initial number of instances to 2.
# The default values for instances.deploy is 1.
###########################################################

instances:
  deploy: 2

relationships:
  - target: django_security_group
    type: cloudify.openstack.server_connected_to_security_group
  - target: server_keypair
    type: cloudify.openstack.server_connected_to_keypair

outputs:
myhost:
value:
myhost_ip: { get_attribute: [my_host, ip] }

but this will not work!
could you please help me, thanks very much !