[ovirt-users] R: Re: Network instability after upgrade 3.6.0 -> 3.6.1

[Stefano Danzi]

Network problems was solved after changing Bond mode  (and it's strange. I have to investigate around qemu-kvm, cento 7.2 and switch firmware ), but broker problem still exist.  If I turn on the host, ha agent start engine vm. When engine VM is up, broker strats to send email.  Now I haven't here detailed logs.

-------- Messaggio originale --------
Da: Yedidyah Bar David <didi at redhat.com> 
Data: 20/12/2015  11:20  (GMT+01:00) 
A: Stefano Danzi <s.danzi at hawai.it>, Dan Kenigsberg <danken at redhat.com> 
Cc: users <users at ovirt.org> 
Oggetto: Re: [ovirt-users] Network instability after upgrade 3.6.0 -> 3.6.1 

On Fri, Dec 18, 2015 at 5:31 PM, Stefano Danzi <s.danzi at hawai.it> wrote:
> I found this in vdsm.log and I think that could be the problem:
>
> Thread-3771::ERROR::2015-12-18
> 16:18:58,597::brokerlink::279::ovirt_hosted_engine_ha.lib.brokerlink.BrokerLink::(_communicate)
> Connection closed: Connection closed
> Thread-3771::ERROR::2015-12-18 16:18:58,597::API::1847::vds::(_getHaInfo)
> failed to retrieve Hosted Engine HA info
> Traceback (most recent call last):
>   File "/usr/share/vdsm/API.py", line 1827, in _getHaInfo
>     stats = instance.get_all_stats()
>   File
> "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
> line 103, in get_all_stats
>     self._configure_broker_conn(broker)
>   File
> "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
> line 180, in _configure_broker_conn
>     dom_type=dom_type)
>   File
> "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py",
> line 176, in set_storage_domain
>     .format(sd_type, options, e))
> RequestError: Failed to set storage domain FilesystemBackend, options
> {'dom_type': 'nfs3', 'sd_uuid': '46f55a31-f35f-465c-b3e2-df45c05e06a7'}:
> Connection closed

My guess is that this is a consequence of your networking problems.

Adding Dan.

>
>
> Il 17/12/2015 18.51, Stefano Danzi ha scritto:
>>
>> I partially solve the problem.
>>
>> My host machine has 2 network interfaces with a bond. The bond was
>> configured with  mode=4 (802.3ad) and switch was configured in the same way.
>> If I remove one network cable the network become stable. With both cables
>> attached the network is instable.
>>
>> I removed the link aggregation configuration from switch and change the
>> bond in mode=2 (balance-xor). Now the network are stable.
>> The strange thing is that previous configuration worked fine for one
>> year... since the last upgrade.
>>
>> Now ha-agent don't reboot the hosted-engine anymore, but I receive two
>> emails from brocker evere 2/5 minutes.
>> First a mail with "ovirt-hosted-engine state transition
>> StartState-ReinitializeFSM" and after "ovirt-hosted-engine state transition
>> ReinitializeFSM-EngineStarting"
>>
>>
>> Il 17/12/2015 10.51, Stefano Danzi ha scritto:
>>>
>>> Hello,
>>> I have one testing host (only one host) with self hosted engine and 2 VM
>>> (one linux and one windows).
>>>
>>> After upgrade ovirt from 3.6.0 to 3.6.1 the network connection works
>>> discontinuously.
>>> Every 10 minutes HA agent restart hosted engine VM because result down.
>>> But the machine is UP,
>>> only the network stop to work for some minutes.
>>> I activate global maintenace mode to prevent engine reboot. If I ssh to
>>> the hosted engine sometimes
>>> the connection work and sometimes no.  Using VNC connection to engine I
>>> see that sometime VM reach external network
>>> and sometimes no.
>>> If I do a tcpdump on phisical ethernet interface I don't see any packet
>>> when network on vm don't work.
>>>
>>> Same thing happens fo others two VM.
>>>
>>> Before the upgrade I never had network problems.
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>
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-- 
Didi
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