Hi All

I have created a heat template which is as follows :

heat_template_version: 2013-05-23

description: >
  Heat template to generate Logstash installation .Our Logstash / Kibana setup has four main components:Logstash,Elasticsearch,Kibana,Logstash    Forwarder.



parameters:

  instance_type:
    type: string
    description: Instance type for Logstash server
    default: m1.small
    constraints:
      - allowed_values: [m1.small, m1.medium, m1.large]
        description: instance_type must be one of m1.small, m1.medium or m1.large  
      key:
    type: string
    description: SSH key to connect to the servers




  image_id:
    type: string
    description: ID of the image to use for the Logstash server
    default: fedora_cloud 
    constraints:
      - allowed_values: [ fedora_cloud ]
        description: >
          Image ID must be fedora_cloud  
  Logstash_server_cidr:
    type: string
    description: Logstash app network address (CIDR notation)
    default: 13.13.1.0/24
  Logstash_server_gateway:
    type: string
    description: app network gateway address
    default: 13.13.1.1
  Logstash_server_pool_start:
    type: string
    description: Start of Logstash app network IP address allocation pool
    default: 13.13.1.4
  Logstash_server_pool_end:
    type: string
    description: End of  Logstash app network IP address allocation pool
    default: 13.13.1.34
  Logstash_client_cidr:
    type: string
    description: Logstash client network address (CIDR notation)
    default: 14.14.5.0/24
  Logstash_client_pool_start:
    type: string
    description: Start of Logstash client app network IP address allocation pool
    default: 14.14.5.4
  Logstash_client_pool_end:
    type: string
    description: End of Logstash client app network IP address allocation pool
    default: 14.14.5.20

  public_net_id:
    type: string
    description: The ID of the public network. You will need to replace it with your DevStack public network ID
    default: 8da258bb-0546-4654-bec9-10e6e58b684e
  Logstash_server_name:
    type: string
    label: Logstash account username
    description: Username of the Logstash account to use for notifications.
  Logstash_client_name:
    type: string
    label: Logstash client account username
    description: Username of the Logstash account to use for notifications.
  Logstash_server_ip:
    type: string
    label: Logstash server ip so that client can access it.
    description: Server Ip of the Logstash server to use for client.






resources:

  Logstash_server_network:
      type: OS::Neutron::Net
      properties:
        admin_state_up: true
        name: Logstash_server_network
        shared: true
        tenant_id: admin

  Logstash_server_network_subnet:
      type: OS::Neutron::Subnet
      properties:
        network_id: { get_resource: Logstash_server_network}
        cidr: { get_param: Logstash_server_cidr} 
        gateway_ip: { get_param: Logstash_server_gateway}
        dns_nameservers: [8.8.8.8, 8.8.4.4]
        allocation_pools:
          - start: { get_param: Logstash_server_pool_start }
            end: { get_param: Logstash_server_pool_end }

  Logstash_client_network:
      type: OS::Neutron::Net
      properties:
        admin_state_up: true
        name: Logstash_client_network
        shared: true
        tenant_id: admin

  Logstash_client_subnet:
      type: OS::Neutron::Subnet
      properties:
        network_id: { get_resource: Logstash_client_network }
        cidr: { get_param: Logstash_client_cidr} 
        allocation_pools:
          - start: { get_param: Logstash_client_pool_start }
            end: { get_param: Logstash_client_pool_end }
  router:
      type: OS::Neutron::Router

  router_gateway:
      type: OS::Neutron::RouterGateway
      properties:
        router_id: { get_resource: router }
        network_id: { get_param: public_net_id }

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

  Logstash_server_instance:
    type: OS::Nova::Server
    properties:
      image: { get_param: image_id }      
                key_name: {get_param: key}
      flavor: { get_param: instance_type }
      networks:
        - port: { get_resource: Logstash_server_app_port }
        - network: { get_resource: Logstash_client_network}
      user_data:
        str_replace:
          params:
            Logstash_server_name: { get_param: Logstash_server_name }



          template: |
            #!/bin/bash -ex

            # install dependencies
            # Install java 7 as elastic search recommends it. Plus prerequisites
            mkdir logstash











  Logstash_client_instance:
    type: OS::Nova::Server
    properties:
      image: { get_param: image_id }
      key_name: {get_param: key}
      flavor: { get_param: instance_type }
      networks:
        - network: { get_resource: Logstash_server_network}
      user_data:
        str_replace:
          params:
            Logstash_client_name: { get_param: Logstash_client_name }
            Logstash_server_ip: { get_param: Logstash_server_ip }



          template: |
            #!/bin/bash -ex

            # Generate SSL certificates
            sudo mkdir -p /etc/pki ...