Re: [Openstack] Help, How to restore existing vms after host reboot?

[Razique Mahroua]

Mmmm, I myself think it's not a good idea if you have an attached volume (via nova-volume) Virsh rely on a disk-path populated via the open-iscsi component - thus an inactive session (after an host reboot) will likely prevent the domain from starting.  the only dirty workaround I found so far is to redefine the domain before restarting it :  # virsh undefine my_domain # virsh define /var/lib/nova/instances/my_domain/libvirt.xml I worked on that problematic few months back - you can also save the iscsi sessions, and make sure you restore them before - the only thing is to make sure iscsi sessions mount up before libvirt and nova-compute start  #1 - openiscsi #2- libvirt #3- nova-compute Nuage & Co - Razique Mahroua  razique.mahr...@gmail.com Le 12 mars 2012 à 15:14, Christian Wittwer a écrit : You can let nova-compute start the instances after a host reboot. --start_guests_on_host_boot --resume_guests_state_on_host_boot 2012/3/10 Vishvananda Ishaya <vishvana...@gmail.com>: I think that this branch should make reboot work: https://review.openstack.org/#change,5177 It looks like we should also make sync_power_states run more frequently.  It currently runs every 6 minutes by default. On Mar 8, 2012, at 6:27 PM, DeadSun wrote: As we all know, if host reboot since of some failure or hardware problem, the vms will actually shutoff. But after host up, info in nova db show vm state are "active", and using "nova list" return the same. Now how to start the vms. In Daiblo, I always just using "nova reboot", it works.But in essex version, it seems cannot use "nova reboot" in an inactive domain. I see there is "nova host-action" command, but it not always make vm start. Another way, I can use "virsh start" a domain, but if the vm attach a volume, it doesn't work. "nova volume-detach" cannot detach a volume in an inactive domain. Is there a normal way to resolve this case? -- 非淡薄无以明志，非宁静无以致远 _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to     : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help   : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to     : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help   : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to     : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help   : https://help.launchpad.net/ListHelp

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