On 11/07/2013 12:53 PM, Razique Mahroua wrote:
I think during the migrations, the compute topic already checks whether or not the storage is a shared one
You are correct, but it does it by creating a temporary file on one node and testing for it on the other node. Kind of ugly, and this technique doesn't work for the "evacuate" case where one of the compute nodes is down.
Also, the "nova host-evacuate" command currently cannot handle a mix of instances on local storage and instances booting from cinder volumes (which counts as shared storage, as far as I can tell). So you have to do all of one type one at a time, and then you can do the rest all in a bunch.
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