Open Stack

Here’s one way:

heat_template_version: 2013-05-23
parameters:
  image:
    type: string
    default: TestVM
  flavor:
    type: string
    default: m1.micro
  network:
    type: string
    default: cirros_net2

resources:
  serv_1:
    type: OS::Nova::Server
    properties:
      image: { get_param: image }
      flavor: { get_param: flavor }
      networks:
        - network: {get_param: network}
      scheduler_hints: {different_host: {get_resource: serv_2}}
   serv_2:
    type: OS::Nova::Server
    properties:
      image: { get_param: image }
      flavor: { get_param: flavor }
      networks:
        - network: {get_param: network}
      scheduler_hints: {different_host: {get_resource: serv_1}}

Note: In order to the above mentioned scheduler hints to work, the following scheduler filter should be enabled for nova scheduler
          SameHostFilter and
          DifferentHostFilter

There’s another way of doing it using OS::Nova::ServerGroup, but it’s available only since Juno.

-
Dimitri

From: Daniel Comnea <comnea.dani at gmail.com<mailto:comnea.dani at gmail.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Sunday 24 May 2015 12:24
To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: Re: [openstack-dev] [heat][nova]: anti-affinity policy via heat in IceHouse?

Thanks Kevin !

Would you have an example?

Much appreciated,
Dani


On Sun, May 24, 2015 at 12:28 AM, Fox, Kevin M <Kevin.Fox at pnnl.gov<mailto:Kevin.Fox at pnnl.gov>> wrote:
It works with heat. You can use a scheduler hint on the instance and the server group resource to make a new one.

Thanks,
Kevin

________________________________
From: Daniel Comnea
Sent: Saturday, May 23, 2015 3:17:11 PM
To: OpenStack Development Mailing List (not for usage questions)
Subject: [openstack-dev] [heat][nova]: anti-affinity policy via heat in IceHouse?

Hi,

I'm aware of the anti-affinity policy which you can create via nova cli and associated instances with it.
I'm also aware of the default policies in nova.conf

by creating instances via HEAT is any alternatives to create instances part of anti-affinity group?

Thx,
Dani

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