[ovirt-users] Server dont work after Host setting

[Yedidyah Bar David]

On Thu, Dec 10, 2015 at 11:38 AM, Taste-Of-IT <kontakt at taste-of-it.de> wrote:
> Am 2015-12-10 08:23, schrieb Yedidyah Bar David:
>>
>> 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 :-) ).
>>
>> 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,
>
> Hello,
> it woulhd be nice to have a "small" solution with ovirt for a single host

Simone already replied that you can already do that with loopback iscsi.

That said, if you only want to manage a single host, with no plans for
HA or grow, isn't virt-manager enough? Or even virsh, if you feel comfortable
at the command line?

> with local storage. logically there whould be no ha, but you can always use
> it for kvm virtualisation and i think thats the main thing in ovirt. all
> other with ha and external storage is good to have, but for smaller
> situations or starting conditions to much to effort. Anywhere you do a great
> job.

Thanks!

Best,
-- 
Didi