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How to remove a physical compute node from production OpenStack cluster safely

hi ,

i have set up a openstack (Havana) use Dev/QA in my company. but there are haveware must be switch to other organization. so the running VM host on the servers will be migrated other compute node server. i think it should have below steps:

1.Distable the compute service at the compute node which will be removed.

2.Migrated all of the VMs from this server.

3.Remove the host record from nova database

So I am not sure that it's a right solution, i want to know what guys to do usually? Can you give me you steps??