nova availability zone

find a bug:

at first there is only one zone.

create aggregate host1 in zone1

create aggregate host1 in zone1

then create boot a vm.

It will fail.

set default_availability_zone in cinder.conf

http://docs.openstack.org/draft/config-reference/content/section_volume-misc.html 

set default_availability_zone in nova.conf 

http://docs.openstack.org/draft/config-reference/content/list-of-compute-config-options.html 

参考：

刘卫军：

OpenStack重要概念理解（Regions+Cells+Availability Zones+Host Aggregates等） 

OpenStack Availability Zone和Aggregate Hosts理解 

OpenStack Availability Zone和Aggregate Hosts理解

孔令贤：

【OpenStack】F版和G版中的Availability Zone 

Openstack 中的zone ,aggregates和host及其应用