Openstack Heat template for flat network - openstack

Question

I have configured 2-Node Openstack(Icehouse) setup and heat is also configured. when creating instance using HOT template it is successfully launched. But when I'm trying to create the flat network using my yml file it shows below error-
"Unable to create the network. No tenant network is available for allocation"
heat_template_version: 2013-05-23
description: Simple template to deploy a single compute instance
resources:
provider_01:
type: OS::Neutron::ProviderNet
properties:
physical_network: physnet2
shared: true
network_type: flat
network_01:
type: OS::Neutron::Net
properties:
admin_state_up: true
name: External2
shared: true
#admin tenant id
tenant_id: 6ec23610836048ddb8f9294dbf89a41e
subnet_01:
type: OS::Neutron::Subnet
properties:
name: Subnet2
network_id: { get_resource: network_01 }
cidr: 192.168.56.0/24
gateway_ip: 192.168.56.1
allocation_pools: [{"start": 192.168.56.50, "end": 192.168.56.70}]
enable_dhcp: true
port_01:
type: OS::Neutron::Port
properties:
admin_state_up: true
network_id: { get_resource: network_01 }
#security_groups: "default"

Answer 1

heat_template_version: 2014-10-16
description: Template to create a tenant network along with router config
parameters:
ImageId:
type: string
label: cirros-0.3.2-x86_64
description: cirros-0.3.2-x86_64
resources:
demo-net:
type: OS::Neutron::Net
properties:
name: demo-net
demo-subnet:
type: OS::Neutron::Subnet
properties:
name: demo-subnet
network_id: { get_resource: demo-net }
cidr: 10.10.0.0/24
gateway_ip: 10.10.0.1
my_instance:
type: OS::Nova::Server
properties:
name: "demo_test_nw_01"
image: { get_param: ImageId }
flavor: "m1.tiny"
networks:
- network : { get_resource: demo-net }