Openstack API-Nova与Ceilometer了解实例状态

Question

Does anyone knows a way to ask to openstack, through API, if a instance is running or not? I don't even know if I have to ask to Ceilometer or Nova.

Thanks in advance

Answer 1

Normally you would ask Nova to get current state, and Ceilometer to get historical states (eg for billing). Assuming you've got a valid nova client:

 servers = nova.servers.list(detailed=True)
 for s in servers:
     print(s.status)

There are potentially other attributes that can give you more detailed information depending on your setup, eg extended status power state (you need to use getattr vs . because of the illegal identifier characters in the name):

 print(getattr(s, "os-extended-status:power_state"))