Re: [openstack-dev] Stateful Applications on OpenStack

2014-06-09 Thread Georgy Okrokvertskhov
Hi Hossein, In additions you may check the following: Heat OS::Heat::HARestarter resource http://docs.openstack.org/developer/heat/template_guide/openstack.html This blog entry about clustering: http://vmtrooper.com/openstack-your-windows-cluster-with-neutron-allowed-address-pairs/ Mistral project

Re: [openstack-dev] Stateful Applications on OpenStack

2014-06-09 Thread hossein zabolzadeh
Really thanks Georgy for your complete answer. My major concern on openstack was HA on my legacy apps(I wanted to use cloudstack instead of openstack becasue of its more attention to legacy apps and more HA features). But now, I will check your listed HA solutions on openstack and come back as soon

Re: [openstack-dev] Stateful Applications on OpenStack

2014-06-09 Thread Georgy Okrokvertskhov
Hi, You still can run legacy application on OpenStack with HA and DR using the same good old school tools like pacemaker, heartbeat, DRBD etc. There are all necessary features available in latest OpenStack. The most important feature for HA - secondary IP address was implemented in Havana. Now you

Re: [openstack-dev] Stateful Applications on OpenStack

2014-06-09 Thread Matthew Farina
In my experience building apps that run in OpenStack, you don't give up state. You shift how you handle state. For example, instead of always routing a user to the same instance and that instance holding the session data there is a common session store for the app (possibly synced between regions)

[openstack-dev] Stateful Applications on OpenStack

2014-06-09 Thread hossein zabolzadeh
Hi OpenStack Development Community, I know that the OpenStack interest is to become a cloud computing operating system. And this simple sentence means: "Say goodbye to Statefull Applications". But, as you know we are in the transition phase from stateful apps to stateless apps(Remember Pets and Cat