[ovirt-users] storage redundancy in Ovirt

[Dan Yasny]

When you set up a storage domain, you need to specify a host to perform the
initial storage operations, but once the SD is defined, it's details are in
the engine database, and all the hosts get connected to it directly. If the
first host you used to define the SD goes down, all other hosts will still
remain connected and work. SPM is an HA service, and if the current SPM
host goes down, SPM gets started on another host in the DC. In short,
unless your actual NFS exporting host goes down, there is no outage.

On Sat, Apr 15, 2017 at 1:53 PM, Konstantin Raskoshnyi <konrasko at gmail.com>
wrote:

> Hi Fernando,
> I see each host has direct connection nfs mount, but yes, if main host to
> which I connected nfs storage going down the storage becomes unavailable
> and all vms are down
>
>
> On Sat, Apr 15, 2017 at 10:37 AM FERNANDO FREDIANI <
> fernando.frediani at upx.com> wrote:
>
>> Hello Konstantin.
>>
>> That doesn`t make much sense make a whole cluster depend on a single
>> host. From what I know any host talk directly to NFS Storage Array or
>> whatever other Shared Storage you have.
>> Have you tested that host going down if that affects the other with the
>> NFS mounted directlly in a NFS Storage array ?
>>
>> Fernando
>>
>> 2017-04-15 12:42 GMT-03:00 Konstantin Raskoshnyi <konrasko at gmail.com>:
>>
>>> In ovirt you have to attach storage through specific host.
>>> If host goes down storage is not available.
>>>
>>> On Sat, Apr 15, 2017 at 7:31 AM FERNANDO FREDIANI <
>>> fernando.frediani at upx.com> wrote:
>>>
>>>> Well, make it not go through host1 and dedicate a storage server for
>>>> running NFS and make both hosts connect to it.
>>>> In my view NFS is much easier to manage than any other type of storage,
>>>> specially FC and iSCSI and performance is pretty much the same, so you
>>>> won`t get better results other than management going to other type.
>>>>
>>>> Fernando
>>>>
>>>> 2017-04-15 5:25 GMT-03:00 Konstantin Raskoshnyi <konrasko at gmail.com>:
>>>>
>>>>> Hi guys,
>>>>> I have one nfs storage,
>>>>> it's connected through host1.
>>>>> host2 also has access to it, I can easily migrate vms between them.
>>>>>
>>>>> The question is - if host1 is down - all infrastructure is down, since
>>>>> all traffic goes through host1,
>>>>> is there any way in oVirt to use redundant storage?
>>>>>
>>>>> Only glusterfs?
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at ovirt.org
>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>
>>>>>
>>
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