+1, better solution than mine (safer, simpler), thank you Alex. Do still keep in mind the possible trouble with thin provisioning.
On 24/03/13 14:39, Alex Leonhardt wrote: > From experience, I would shutdown the ovirt engine before you do any > work related to networking. The VMs will keep running w/o the engine > available, you're simply unable to add/remove/failover VMs, etc. The > VDSM running on the host will be unable to get instructions to "kill" > any VMs as the engine is already "down" :) ... > > hope it helps! > alex > > > > > On 03/24/2013 10:04 AM, Lior Vernia wrote: >> Hello Jonathan, >> >> First of all let me apologize for not being more responsive, seems like >> you got the worse end of time difference. >> >> Now, in case the question is still relevant: >> >> 1. Rebooting the first switch won't cause any damage. The VMs will lose >> connectivity on the VLANs, but they should still be manageable through >> oVirt and run normally on their hosts. >> >> 2. Rebooting the second one could prove more troublesome. Firstly, as a >> preemptive measure I would advise that you not have any VMs running on >> your host marked as SPM at the moment of reboot, if possible - there's >> risk that VMs running on your SPM will be shut down violently when it >> loses connectivity (or the moment it regains connectivity). Also, if any >> of your VMs have thin provisioning defined and they exhaust their >> storage during downtime, they'll run into trouble; but as far as I know >> they should be okay if they're not running processes that can suddenly >> demand a lot more storage. That's as far as possible damage goes. >> Besides that, when the switch comes back up, some components (host, data >> domain) might appear as non-operational or down, and you might have to >> reactivate them manually from the webadmin console. >> >> Hope this helps. >> >> Yours, Lior Vernia. >> >> On 21/03/13 20:42, Jonathan Horne wrote: >>> greetings, >>> >>> we are talking about possibly upgrading our cisco gear tonight, and this >>> will affect our ovirt environment. >>> >>> what can i expect if i were to reboot first the switch that all VMguest >>> VLANs are going thru, ad then afterwards rebooting the switch that all >>> ovirtmgmt connections are in? how will the ovirt environment behave >>> with loss of network connectivity for a couple minutes? >>> >>> the iscsi network is not going to be affected. any information or >>> stories of similar experiences would be appreciated. >>> >>> thanks, >>> jonathan >>> >>> >>> ------------------------------------------------------------------------ >>> This is a PRIVATE message. If you are not the intended recipient, please >>> delete without copying and kindly advise us by e-mail of the mistake in >>> delivery. NOTE: Regardless of content, this e-mail shall not operate to >>> bind SKOPOS to any order or other contract unless pursuant to explicit >>> written agreement or government initiative expressly permitting the use >>> of e-mail for such purpose. >>> >>> >>> _______________________________________________ >>> Users mailing list >>> [email protected] >>> http://lists.ovirt.org/mailman/listinfo/users >>> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
