# This describes what is deployed by this template.
description: NFS server and clients deployed with Heat on Chameleon

# This defines the minimum Heat version required by this template.
heat_template_version: 2015-10-15

# The resources section defines what OpenStack resources are to be deployed and
# how they should be configured.
resources:
  nfs_server_floating_ip:
    type: OS::Nova::FloatingIP
    properties:
      pool: public

  nfs_server:
    type: OS::Nova::Server
    properties:
      flavor: baremetal
      image: CC-CentOS7
      key_name: { get_param: key_name }
      networks:
         - network: sharednet1
      scheduler_hints: { reservation: { get_param: reservation_id } }
      user_data: |
        #!/bin/bash
        yum install -y nfs-utils
        mkdir -p /exports/example
        chown -R cc:cc /exports
        echo '/exports/example 10.0.0.0/8(rw,async)' >> /etc/exports
        systemctl enable rpcbind && systemctl start rpcbind
        systemctl enable nfs-server && systemctl start nfs-server

  nfs_server_ip_association:
    type: OS::Nova::FloatingIPAssociation
    properties:
      floating_ip: { get_resource: nfs_server_floating_ip }
      server_id: { get_resource: nfs_server }

  nfs_clients:
    type: OS::Heat::ResourceGroup
    properties:
      count: { get_param: nfs_client_count }
      resource_def:
        type: OS::Nova::Server
        properties:
          flavor: baremetal
          image: CC-CentOS7
          key_name: { get_param: key_name }
          networks:
             - network: sharednet1
          scheduler_hints: { reservation: { get_param: reservation_id } }
          user_data:
            str_replace:
              template: |
                #!/bin/bash
                yum install -y nfs-utils
                echo "$nfs_server_ip:/exports/example    /mnt/    nfs" > /etc/fstab
                mount -a
              params:
                $nfs_server_ip: { get_attr: [nfs_server, first_address] }

# The parameters section gathers configuration from the user.
parameters:
  nfs_client_count:
    type: number
    description: Number of NFS client instances
    default: 1
    constraints:
      - range: { min: 1 }
        description: There must be at least one client.
  key_name:
    type: string
    description: Name of a KeyPair to enable SSH access to the instance
    default: default
    constraints:
    - custom_constraint: nova.keypair
  reservation_id:
    type: string
    description: ID of the Blazar reservation to use for launching instances.
    constraints:
    - custom_constraint: blazar.reservation

outputs:
  server_ip:
    description: Public IP address of the NFS server
    value: { get_attr: [nfs_server_floating_ip, ip] }
  client_ips:
    description: Private IP addresses of the NFS clients
    value: { get_attr: [nfs_clients, first_address] }