Affinity & Anti-Affinity

Openstack itself, doesnot provide hypervisor high availability. But still, openstack administrator can create HA cluster for their applications. But for this, administrator should make sure that, the virtual machines he deployed must be in different hypervisor. Normally, nova-scheduler will choose the hypervisor based on the filter applied in the nova.conf file. So, how can an…

Error communicating with http://192.168.1.2:9292 [Errno 111] ECONNREFUSED

Some times, when you trying to deploy a machine, you may ended up with the following error. In my case, the infrastructure is as follows. One Controller Node, Two compute Nodes, One cinder and One Neutron node. All are Centos 6.6 with Icehouse Release. 2013-10-30 12:34:03.574 15487 TRACE nova.api.openstack CommunicationError: Error communicating with http://192.168.1.2:9292 [Errno…