Dear I find H.A for openstack nova-network http://docs.openstack.org/trunk/openstack-compute/admin/content/existing-ha-networking-options.html Openstack instance support NFS migrate by all compute node. Swift have Zone and backup objects. MySql have Cluster. How about all openstack H.A or Failover? If Openstack controller physical machine crash. (Dashboard, nova-api, nova information, glance, keystone, etc...) All service will disappear. Could we recover openstack controller automatically? Thanks all. Edward -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20121121/27cc6b9b/attachment.html>