On Mon, Jul 01, 2013 at 08:48:24AM +0000, John Ashford wrote: > I am a newbie and trying to understand how to scale. If i have a web server > on a VM within Openstack is it done by simply assigning more cores to the web > server VM? And is there a way to do so automatically within Openstack? And > when you reach the maximum number of cores on one physical machine, can you > spread load across multiple physical machines without a load balancer in > front?
There are several ways you could approach this problem, but I'll mention the AutoScaling capability provided by heat, as it does exactly what you want AFAICT. We provide orchestration capabilities which allow you to spin up groups of instances, e.g running web server applications, and balance requests via another instance running a simple haproxy based loadbalancer (so you don't need an actual physical loadbalancer appliance). You can use the AutoScaling functionality without any loadbalancer resource if you wish, such as in the OpenShift demo linked below (where the broker node is doing the load balancing) The trigger for scaling out can either be manual (using the InstanceGroup resource combined with stack updates), or automatic (using the AutoScalingGroup resource combined with alarms. There are example templates in the heat-templates repository: https://github.com/openstack/heat-templates/blob/master/cfn/AutoScalingMultiAZSample.yaml Here are some demo videos which describe/demonstrate this feature in more detail: http://www.youtube.com/watch?v=9lLSZi6njq4 http://www.youtube.com/watch?v=nEzK-2lsEVg&feature=youtu.be&t=34m35s HTH, Steve _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
