[ovirt-users] minimum DNS requirements for /etc/hosts

[Jeremiah Jahn]

I only use names for storage, but didn't have entries for the engine
yet, So I think ssh was slow since it couldn't do reverse DNS lookups
against the engine where my consoles are coming from. Thanks for the
input. I wanted to verify before testing since this is a production
environment. It seems like even the XMLRPC code must try and do a
reverse DNS against the engine as well, not just ssh.  Seems like the
engine hosts also needs said hosts file as well..

On Mon, Apr 14, 2014 at 8:23 AM, René Koch <rkoch at linuxland.at> wrote:
> On 04/14/2014 03:08 PM, Jeremiah Jahn wrote:
>>
>> So like the nut job I am, I host my dns server on a virtual machine
>> that is now hosted by ovirt, I also have a few gateway machine in
>> there as well for routing traffic between internal networks.  With
>> virt-manager, DNS rarely seemed to be an issue. I'd connect to a host
>> IP, and bring up the vm, no problem. Ovirt on the other hand takes
>> forever if dns is down. So i've passed around a /etc/hosts file to
>> resolve any ip address that ovirt might be looking for while dns is
>> out.  I'd like to verify at an abstract level, what needs to be in
>> said file, to keep everything from timing out, or just taking forever.
>>
>> name and FQDN of each host
>> name and FQDN of engine host
>> name and FQDN of each storage domain.
>>
>> Is this enough, or are there other places/things the ovirt node and
>> hosts might be trying to resolve?
>
>
> Afaik this should be enough.
> Just remember that e.g. ssh login will still be slow if the DNS server isn't
> reachable as you have to wait until it reaches a timeout.
>
> My oVirt setup doesn't have any DNS entry - just the hosts and engine in
> /etc/hosts. But I don't use DNS names at all only IP addresses...
>
>
> Regards,
> René
>
>>
>> thanks,
>> -jj-
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>