################################################################################
# Copyright (c) 2013-2015 Wind River Systems, Inc.
#
# SPDX-License-Identifier: Apache-2.0
#
################################################################################
#
# Objective:
#    Demonstrate constructing the heat resource OS::Nova::ServerGroup
#
# Pre-Reqs:
#    Normal Lab Setup (networks, host interfaces, glance images)
#
# Mandatory Template Parameters:
#    None
#
# Tenant Considerations:
#    None
#
# Sample CLI syntax:
#    heat stack-create -f OS_Nova_ServerGroup.yaml STACK
#
# Expected Outcome:
#  A new nova servergroup of size 2 and type affinity
#    nova server-group-list
#
################################################################################

heat_template_version: 2015-04-30

description: >
   Demonstrate the OS::Nova::ServerGroup heat resource

parameters:

    FLAVOR:
        type: string
        description: Nova flavor to use (nova flavor-list)
        default: small
        constraints:
            - custom_constraint: nova.flavor

    NETWORK:
        type: string
        description: network to use (neutron net-list)
        default: private-net0
        constraints:
            - custom_constraint: neutron.network

    IMAGE:
        description: Glance image to use (glance image-list)
        type: string
        default: wrl6
        constraints:
            - custom_constraint: glance.image

    SIZE:
        description: Number of servers to create for the group
        type: number
        default: 2

resources:

    OS_Nova_ServerGroup:
        type: OS::Nova::ServerGroup
        properties:
            #################################################
            # Required properties
            #################################################
            # policies: {description: The scheduler policy for the server
            # group., required: true, type: string}
            # Note: only valid values are 'affinity'  or 'anti-affinity'
            policies: ['affinity']

            #################################################
            # Optional properties:
            #################################################
            # best_effort: {description: Whether the scheduler should still
            # allow the server to be created even if it cannot satisfy the
            # group policy. (Optional.), required: false, type: boolean}
            best_effort: true

            # group_size: {description: Maximum number of servers in the
            # server group. (Optional.), required: false, type: integer}
            group_size: { get_param: SIZE }

    OS_Nova_RG:
        type: OS::Heat::ResourceGroup
        properties:
            count: { get_param: SIZE }
            resource_def:
                type: OS::Nova::Server
                properties:
                    networks:
                        - network: { get_param: NETWORK }
                    image: { get_param: IMAGE }
                    flavor: { get_param: FLAVOR }
                    scheduler_hints:
                        group: { get_resource: OS_Nova_ServerGroup }