Openstack Heat template with anti affinity group example

Example of using heat template which allows us to keep virtual machines on different physical hosts.

Example heat template

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heat_template_version: 2014-10-16

description: Haproxy hosts

parameters:
service-flavour:
type: string
default: rhel6-cloud.1.2
image:
type: string
default: redhat6
key_name:
type: string
default: mykey

resources:
haproxy-svrgrp:
type: OS::Nova::ServerGroup
properties:
name: haproxy-svrgrp
policies: [ 'anti-affinity' ]

haproxy-01:
type: OS::Nova::Server
properties:
name: haproxy-01
flavor: { get_param: service-flavour }
image: { get_param: image }
key_name: { get_param: key_name }
admin_user: cloud-user
networks:
- port: { get_resource: haproxy-01-port }
scheduler_hints:
group: haproxy-svrgrp

haproxy-02:
type: OS::Nova::Server
properties:
name: haproxy-02
flavor: { get_param: service-flavour }
image: { get_param: image }
key_name: { get_param: key_name }
admin_user: cloud-user
networks:
- port: { get_resource: haproxy-02-port }
scheduler_hints:
group: haproxy-svrgrp


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Further readings

http://docs.openstack.org/developer/heat/template_guide/hot_spec.html

http://docs.openstack.org/icehouse/config-reference/content/section_compute-scheduler.html