So there is no need to implement libvirt driver for the host_maintenance_mode API as host_maintenance_mode is mainly for VMWare and XenServer, also we can use evacuate and os-services/disable for libvirt host maintain, right?
Thanks, Jay 2014-02-23 5:22 GMT+08:00 Bruce Montague <bruce_monta...@symantec.com>: > > On Fri Feb 21 21:14:56 UTC 2014 Joe Gordon <joe.gordon0 at gmail.com> > wrote: > > > On Thu, Feb 20, 2014 at 9:38 AM, Matt Riedemann <mriedem at > linux.vnet.ibm.com> wrote: > >> > >> > >> On 2/19/2014 4:05 PM, Matt Riedemann wrote: > >>> > >>> The os-hosts OS API extension [1] showed up before I was working on the > >>> project and I see that only the VMware and XenAPI drivers implement it, > >>> but was wondering why the libvirt driver doesn't - either no one wants > >>> it, or there is some technical reason behind not implementing it for > >>> that driver? > >>> > > > > If I remember correctly maintenance mode is a special thing in Xen. > > > Maintenance mode is pretty heavily used with VMware vCenter. When an > environment supports "universal" live migration of all VMs, it makes sense > to migrate all VMs running on a physical machine off of that machine before > bringing it down for maintenance, such as upgrading the hardware. Provides > some classes of end-users with a more 24x7x365 experience. > > > >>> [1] > >>> > >>> > http://docs.openstack.org/api/openstack-compute/2/content/PUT_os-hosts-v2_updateHost_v2__tenant_id__os-hosts__host_name__ext-os-hosts.html > >>> > >>> > >> > >> By the way, am I missing something when I think that this extension is > >> already covered if you're: > >> > >> 1. Looking to get the node out of the scheduling loop, you can just > disable > >> it with os-services/disable? > >> > >> 2. Looking to evacuate instances off a failed host (or one that's in > >> "maintenance mode"), just use the evacuate server action. > > > > I don't think your missing anything. > > > >> > >> > >> -- > >> > >> Thanks, > >> > >> Matt Riedemann > >> > >> > > > > -bruce > > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > -- Thanks, Jay
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