Hi, the steps make good sense indeed, but use global maintenance mode as Sandro suggested.
Good luck and keep us posted. -- Martin Sivák [email protected] Red Hat Czech RHEV-M SLA / Brno, CZ ----- Original Message ----- > ----- Original Message ----- > > From: "Sandro Bonazzola" <[email protected]> > > To: "Kostyrev Aleksandr" <[email protected]>, "Users" <[email protected]>, > > "Martin Sivak" <[email protected]>, "Yedidyah > > Bar David" <[email protected]>, "Fabian Deutsch" <[email protected]> > > Sent: Monday, March 30, 2015 9:44:05 AM > > Subject: Re: [ovirt-users] Change network of ovirt-nodes of a self-hosted > > engine cluster > > > > Il 30/03/2015 08:40, Sandro Bonazzola ha scritto: > > > Il 25/03/2015 14:32, Kostyrev Aleksandr ha scritto: > > >> Good day! > > >> > > >> I'm in position when I have to change network settings of three > > >> ovirt-nodes that comprise my cluster with hosted engine. > > >> Am I correct that to change network is not a big deal and it is > > >> possible? > > >> My plan was: > > >> 1. shutdown all vms (except engine itself) on all nodes. > > >> 2. enable maintenance mode on all nodes, except the one with running > > >> engine > > > > > > I think you should use Hosted Engine global maintenance while doing this. > > > If for some reason the gateway configured in hosted_engine.conf become > > > unreachable I'm not sure it won't try to migrate the VM. > > > Adding Martin to the loop. > > > > > > > Also if for some reason the storage become unavailable during the network > > settings update, the engine VM will be paused due to missing storage. > > I'm not sure about what will happen with the SSL certificates, didi? > > In 3.5+, the certs all use the hostnames, which I understand are not intended > to be changed, so no issue there. > > If some of the hosts were deployed with <= 3.4 and upgraded, the certs will > use the IP address, and this will not change unless you manually reinstall > (re-deploy?). Didn't try that. I guess at least some things will fail. > > > > > >> 3. change network settings in engine node > > >> 4. shut engine down with hosted-engine --vm-stop > > >> 5. change network settings on all nodes, verify that nodes can ping each > > >> other > > >> 6. start engine with hosted-engine --vm-start > > >> 7. change VLAN tag at Logical Network for VMs > > >> 8. activate nodes > > >> 9. start vms > > >> > > >> Does it make sense? > > > > If you manage to end successfully the migration it would be really nice to > > have a wiki page describing the steps you took for this task. > > Indeed! > > Best, > -- > Didi > _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
