[ovirt-users] Server dont work after Host setting

Thu Dec 10 09:04:55 UTC 2015

On Thu, Dec 10, 2015 at 8:23 AM, Yedidyah Bar David <didi at redhat.com> wrote:

> On Mon, Dec 7, 2015 at 2:59 PM, Taste-Of-IT <kontakt at taste-of-it.de>
> wrote:
> > Am 2015-12-07 13:41, schrieb Yedidyah Bar David:
> >>
> >> On Mon, Dec 7, 2015 at 1:54 PM, Taste-Of-IT <kontakt at taste-of-it.de>
> >> wrote:
> >>>
> >>> Am 2015-12-07 11:17, schrieb Yedidyah Bar David:
> >>>>
> >>>>
> >>>> On Mon, Dec 7, 2015 at 11:34 AM, Taste-Of-IT <kontakt at taste-of-it.de>
> >>>> wrote:
> >>>>>
> >>>>>
> >>>>> Am 2015-12-07 10:21, schrieb Yedidyah Bar David:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> On Mon, Dec 7, 2015 at 11:05 AM, Taste-Of-IT <
> kontakt at taste-of-it.de>
> >>>>>> wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> Am 2015-12-07 08:06, schrieb Yedidyah Bar David:
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Mon, Dec 7, 2015 at 12:38 AM, Taste-Of-IT
> >>>>>>>> <kontakt at taste-of-it.de>
> >>>>>>>> wrote:
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Hello,
> >>>>>>>>> i am new with ovirt and i installed ovirt engine 3.6 on centos 7.
> >>>>>>>>> After
> >>>>>>>>> first login i create the host with fqdn of ovirt server but
> without
> >>>>>>>>> powersavesettings. Firt i saw installing as status for host, but
> >>>>>>>>> after
> >>>>>>>>> a
> >>>>>>>>> while nothing happend, I reboot the server. In engine.log i see
> >>>>>>>>> "VMs
> >>>>>>>>> initialization finished for Host", but i cant open the webgui.
> What
> >>>>>>>>> can
> >>>>>>>>> i
> >>>>>>>>> do? Where can i look to find the error and what have i done
> wrong?
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> If host-deploy managed to finish, you can see its log in [1].
> >>>>>>>> Otherwise
> >>>>>>>> please try to (re)install the host.
> >>>>>>>>
> >>>>>>>> [1] /var/log/ovirt-engine/host-deploy/
> >>>>>>>>
> >>>>>>>> Best,
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> Hi Didi,
> >>>>>>> ok i will have a closer look into the log. Actuall the WebGUI
> doesnt
> >>>>>>> load,
> >>>>>>> services are up and running. How can i reinstall the host? Via cli?
> >>>>>>> Or
> >>>>>>> do
> >>>>>>> you mean the hostsystem with installed ovirt engine? thx
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Not sure I follow.
> >>>>>>
> >>>>>> The engine runs on some machine, let's call it "the engine machine".
> >>>>>> If it's a self-hosted-engine, it's running inside a VM managed by
> >>>>>> itself.
> >>>>>> Otherwise it's running elsewhere (on some physical machine, or some
> >>>>>> other
> >>>>>> VM).
> >>>>>>
> >>>>>> A "Host", in ovirt terminology, is where VMs run.
> >>>>>>
> >>>>>> Now please describe what you did, what you now try to do that
> doesn't
> >>>>>> work, and what you can find in logs that might be related.
> >>>>>>
> >>>>>> If you can't access the web admin ui, that's a completely different
> >>>>>> problem than if you can't add a host to the engine.
> >>>>>>
> >>>>>> Best,
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> Hi Didi,
> >>>>> as far i understand there are to ways to setup ovirt. One as
> >>>>> self-hosted
> >>>>> enginge for ha and with ovirt host in vm on storage
> >>>>
> >>>>
> >>>>
> >>>> That's called "self-hosted-engine"
> >>>>
> >>>>> and hosted engine where
> >>>>> all runs on the same host.
> >>>>
> >>>>
> >>>>
> >>>> This is called all-in-one [1].
> >>>>
> >>>> [1] http://www.ovirt.org/Feature/AllInOne
> >>>>
> >>>>> So i setup hosted engine on same machine and in
> >>>>> installation process i setup iso_domain via nfs too. i have done
> >>>>> nothing
> >>>>> more yet. so as i can see and read from the manual i now have to
> setup
> >>>>> the
> >>>>> host,
> >>>>
> >>>>
> >>>>
> >>>> No. You are not supposed to setup the host from the web interface.
> >>>> I didn't try that recently, but in the past there were issues similar
> >>>> to what you wrote below. Please follow the instructions in that page.
> >>>> Also please note that in 4.0, allinone will be dropped. Systems that
> >>>> wish to have everything on a single host will need to use
> hosted-engine.
> >>>> Also note that people reported locking issues with local nfs mounts,
> so
> >>>> it seems like the safest bet for now is to use nested kvm - run a VM
> to
> >>>> play the "Host" role, and another VM as an nfs server (or iscsi), and
> >>>> then either a third VM for the engine, or hosted-engine (meaning,
> engine
> >>>> runs inside a VM running inside the first VM).
> >>>>
> >>>>> than network and than data domain and so on. now i setup the host and
> >>>>> say new, put a name inside and the fqdn of the initial host of host
> >>>>> engine
> >>>>> like myserver.com. after that i saw the progress which says
> >>>>> "installing.." i
> >>>>> wait several minutes and after that i got network time out and cant
> >>>>> enter
> >>>>> the webgui. hope that helps
> >>>>
> >>>>
> >>>>
> >>>> Good luck,
> >>>
> >>>
> >>>
> >>> Hi,
> >>> that sounds not good. As i understand the only way with ovirt from
> >>> Version 4
> >>> will self-hosted-engine and i have to setup all in nested-vms if i want
> >>> or
> >>> only can use one machine, right?
> >>
> >>
> >> Not sure I completely followed.
> >>
> >> allinone will not be supported in 4.
> >>
> >> hosted-engine will be the only way to install an entire ovirt system on
> >> a single machine, _supported_ by ovirt. And as I said, even this one
> will
> >> require an external storage machine.
> >>
> >> Of course you can use virsh/kvm or whatever other means for creating VMs
> >> and use them to setup ovirt.
> >>
> >>>
> >>> Ok i will have to reinstall my testsystem. Is that the way todo:
> >>> http://www.ovirt.org/Features/Self_Hosted_Engine?
> >>
> >>
> >> Yes, but you can use the howto [1], which is perhaps more comfortable.
> >>
> >> [1] http://www.ovirt.org/Hosted_Engine_Howto
> >>
> >>> So i have to install ovirt
> >>> on centos7, than create a kvm with centos for the engine than for the
> >>> host
> >>> and last a kvm for the nfs and data domain with centos, or better to
> use
> >>> iscsi du to performance? after that i can install the first virtuall
> >>> machine,right?
> >>
> >>
> >> Depends on what you want to do.
> >>
> >> BTW, I didn't mention glusterfs, mainly because I do not know it well,
> >> but that's also something to consider.
> >>
> >>> sounds strange and complicated...
> >>
> >>
> >> ovirt is not designed to manage a single machine. For a single machine,
> >> simpler libvirt frontends are easier to use. If you install it just to
> >> learn/test, that's how it goes.
> >
> > Hi,
> > ok i have to lunge. i have to migrate from proxmox to another vm-system
> and
> > thing ovirt is just fine while open source.. so i asked in the irc for my
> > situation and if ovirt does fit. i have only one server which should run
> a
> > few kvm vm guests (debian, centos, ubuntu...) and also for webservices.
> in
> > the irc they point me to the all-in-solution, i think at that time they
> > didnt know that it will not further supporter from version 4 onto.. for
> my
> > situation 2 server are to much but i will later add more server with ha
> > usability.
>
> (Re-adding the list, adding Sandro)
>
> The plan for hyper-convergence is to require at least 3 hosts, so that you
> have a replica-3 cluster storage.
>
> Perhaps we should reconsider allowing local storage with hosted-engine.
> This will prevent HA, but will fit into the place of current allinone
> usage. The next stage will be that users will ask to migrate this local
> storage to shared one (or even gluster :-) ).
>

A loopback mounted iSCSI target should already do the job; of course there
is a performance price for that.

>
> For a 2-cluster HA setup we do not have, or plan to have AFAIK, any
> official support, but you can have a look at DRBD [1].
>
> [1] http://www.ovirt.org/Features/DRBD
>
> Best,
> --
> Didi
> _______________________________________________
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> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
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