[ovirt-users] Hosted engine deploy: problem with the rDNS of another iface

[Davide Ferrari]

Well but the fact is that it DOESN'T resolve on bond1, there's no DNS entry
anywhere resolving to that IP for vm01.mydomain.tld
That's the strange thing, I don't really get from where python's
socket.gethostbyaddr() gets those 2 IP addresses :/

The only thing that it comes to my mind is that the domain I'm using
(mydomain.tld) doesn't have PTRs properly set (and I cannot fix it without
migrating the domain...yeah it's ugly as hell what I have here, I know :(
), maybe it's a corner case that should be handled more specifically?

I'll try to add entries for vm01.mydomain.tld in /etc/hosts and see if it
fixes the problem

2016-09-14 14:32 GMT+02:00 Simone Tiraboschi <stirabos at redhat.com>:

>
>
> On Wed, Sep 14, 2016 at 2:07 PM, Davide Ferrari <davide at billymob.com>
> wrote:
>
>> But bond0/192.168.10.225 is the only interface I have (right now) to
>> connect to the machine. So, I should create another interface, dedicated to
>> management? Right now I'm using bond0 as the source iface for the mgm
>> bridge.
>>
>
> No this is absolutely fine; the problem is just that 'vm01.mydomain.tld'
> should uniquely resolve there and it should not resolve also on bond1
> otherwise you can hit the issue I mentioned before.
>
>
>>
>> 2016-09-14 14:02 GMT+02:00 Simone Tiraboschi <stirabos at redhat.com>:
>>
>>>
>>>
>>> On Wed, Sep 14, 2016 at 1:53 PM, Davide Ferrari <davide at billymob.com>
>>> wrote:
>>>
>>>> Ciao Simone!
>>>>
>>>> Absolutely, here it is (please not that I've obfuscated domain names
>>>> but they are consistent with what I wrote before, the hostnames are exactly
>>>> the same I have in my env). If you need the original log, tell me but I
>>>> will mail it to you privately.
>>>>
>>>
>>> The issue is here:
>>>
>>> 2016-09-14 13:47:51 DEBUG otopi.plugins.gr_he_common.network.bridge
>>> bridge._get_hostname_from_bridge_if:325 hostname: 'vm01.mydomain.tld',
>>> aliaslist: '[]', ipaddrlist: '['192.168.10.225', '10.30.0.1']'
>>>
>>> You can reproduce it with:
>>>     python -c 'import socket; print(socket.gethostbyaddr("19
>>> 2.168.10.225"));'
>>>
>>> 'vm01.mydomain.tld' should resolve just on the interface you selected to
>>> create the management bridge on.
>>> This is because hosted-engine-setup is creating the management bridge on
>>> that interface before starting the engine VM and when when it will call
>>> hosts.add on the REST API to add your first host to the engine it can just
>>> specify an host address by not an interface name and so host-deploy,
>>> triggered by the engine, will recreate the management bridge on the
>>> interface where the address we passed resolves on.
>>> So we have to avoid any ambiguity here.
>>>
>>>
>>>
>>>>
>>>> Thanks!
>>>>
>>>> 2016-09-14 13:37 GMT+02:00 Simone Tiraboschi <stirabos at redhat.com>:
>>>>
>>>>>
>>>>> On Wed, Sep 14, 2016 at 1:25 PM, Davide Ferrari <davide at billymob.com>
>>>>> wrote:
>>>>>
>>>>>> Hello
>>>>>>
>>>>>> I've got the same exact problem as in this thread:
>>>>>>
>>>>>> http://lists.ovirt.org/pipermail/users/2016-July/041111.html
>>>>>>
>>>>>> (sorry for not answering there but I've just subscribed). The error
>>>>>> (for the record) is:
>>>>>>
>>>>>> Failed to execute stage 'Setup validation': hostname
>>>>>> 'vm01.mydomain.tld' doesn't uniquely match the interface 'bond0' selected
>>>>>> for the management bridge; it matches also interface with IP
>>>>>> set(['10.30.0.1']). Please make sure that the hostname got from the
>>>>>> interface for the management network resolves only there.
>>>>>>
>>>>>> 10.30.0.1 is set on bond1 and is used for the glusterfs network. The
>>>>>> python output is:
>>>>>>
>>>>>> python -c 'import socket; print(socket.gethostbyaddr("10.30.0.1"));'
>>>>>> ('glu-ovirt01.storage', [], ['10.30.0.1'])
>>>>>>
>>>>>> which obviously is completely different from vm01.mydomain.tld.
>>>>>> So, I don't really get this error. I've used
>>>>>> glu-ovirt01.storage:/engine as the glusterfs entry point for storing the
>>>>>> engine image, that's all.
>>>>>>
>>>>>> Any idea on how to fix the error?
>>>>>>
>>>>>
>>>>> Ciao Davide,
>>>>> can you please attach the whole hosted-engine-setup log file?
>>>>>
>>>>>
>>>>>>
>>>>>> TIA
>>>>>>
>>>>>> --
>>>>>> Davide Ferrari
>>>>>> Senior Systems Engineer
>>>>>>
>>>>>> _______________________________________________
>>>>>> Users mailing list
>>>>>> Users at ovirt.org
>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Davide Ferrari
>>>> Senior Systems Engineer
>>>>
>>>
>>>
>>
>>
>> --
>> Davide Ferrari
>> Senior Systems Engineer
>>
>
>


-- 
Davide Ferrari
Senior Systems Engineer
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