OpenStack Compute (nova)

How to Create or Modify Availability Zone Programmably

Asked by Tong Da

I have known that to set an Availability Zone, I should set the node_availability_zone field in nova.conf. But I have two questions about the Availability Zone.

1. How to create or modify Availability Zone by api? The nova command line tool only support availability-zone-list command, lacking creating and modifying command. If this is by design, why?

2. When a host firstly register to controller node as nova zone, modifying the nova.conf to set node_availability_zone to "test_zone" cannot change metadata. The zone is still named as nova in "nova availability-zone-list" and the compute node still belong to nova zone in "nova-manage service list". Is there a way to change a host to another availability zone?

Thanks for your reading and sorry for my poor English.

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Xiang Hui (xianghui) said : 		#1

1. Seems there's not Availability Zone by api, maybe it will be considered to be added into the extension, I think the reason is it is not one of the most import api at first.

2. I don't know which openstack version you are using now? "node_availability_zone" is used on folsom,
set default_availability_zone=<zone-name> in /etc/nova/nova.conf on compute node works on havana, you can try it on grizzly.

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Tong Da (tongda) said : 		#2

I found that using "nova create-aggregate" can assign an availability zone, if not exist, a new one will be created. So this may be a way to manipulate availability zones.

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