HOT template to create a new neutron network plus a router to the public network

heat-neutron-net.yaml

heat_template_version: 2013-05-23

description: >
  HOT template to create a new neutron network plus a router to the public
  network
parameters:
  key_name:
    type: string
    description: Name of keypair to assign to servers
  public_net:
    type: string
    description: >
      ID or name of public network for which floating IP addresses will be allocated
  private_net_name:
    type: string
    description: Name of private network to be created
  private_net_cidr:
    type: string
    description: Private network address (CIDR notation)
  private_net_gateway:
    type: string
    description: Private network gateway address
  private_net_pool_start:
    type: string
    description: Start of private network IP address allocation pool
  private_net_pool_end:
    type: string
    description: End of private network IP address allocation pool

resources:
  private_net:
    type: OS::Neutron::Net
    properties:
      name: { get_param: private_net_name }

  private_subnet:
    type: OS::Neutron::Subnet
    properties:
      network_id: { get_resource: private_net }
      cidr: { get_param: private_net_cidr }
      gateway_ip: { get_param: private_net_gateway }
      allocation_pools:
        - start: { get_param: private_net_pool_start }
          end: { get_param: private_net_pool_end }

  router:
    type: OS::Neutron::Router
    properties:
      external_gateway_info:
        network: { get_param: public_net }

  router_interface:
    type: OS::Neutron::RouterInterface
    properties:
      router_id: { get_resource: router }
      subnet_id: { get_resource: private_subnet }

If using the heat juju charm, you'll need to be sure is fixed with:
https://code.launchpad.net/~jjo/charms/trusty/heat/fix-heat_conf-encryption_key-and-auth_uri-lp1368645-lp1368621

E.g. usage:

heat stack-create -f heat-neutron_net.yaml -P private_net_cidr=192.168.101.0/24 -P private_net_gateway=192.168.101.1 -P private_net_pool_start=192.168.101.10 -P private_net_pool_end=192.168.101.254 -P private_net_name=net_foo -P public_net=ext_net -P key_name=admin_key net_foo