I would say that having worked in a enterprise environment before sometimes we would get calls from a tech wanting to do it asap or you just have the need to do it "now". It would be very nice to have a option to the command like "nova maintenance --evacuate <host>" or something similar which would basically put it into maintenance mode and evac it.
Endre. 2013/4/19 Alex Glikson <[email protected]> > > Was great to see many stackers at the summit! > > Following-up on one of the design discussions, the consensus seemed to be > that the operation which puts a host in maintenance mode should probably > only disable further provisioning requests to that host, while the > orchestration of migrating the individual instances from that host should > be done separately, potentially even outside of Nova. One possible approach > could be to use the admin API to list all the instances on a particular > host, and then to migrate each of them (potentially using the option not to > specify the target host, in which case the new placement will be selected > by the scheduler). Similar approach may apply to recovery of instances from > a failed host, using 'evacuate' API. > > It would be great to understand how people might want to have this > capability surfaced and consumed by the administrator. A script (somehow > shared with the community)? REST API? (provided by which component?) part > of nova-manage? something else? > > Would appreciate your feedback (especially if you manage OpenStack clouds > and is interested in this capability). > > Thanks, > Alex > > P.S. one additional item on our todo list is to enable usage of scheduler > hints when applying the individual migration operations > P.P.S. similar scenarios might be also implemented for Cinder storage > nodes, ones the new volume migration feature gets implemented > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : [email protected] > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp >
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