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From Nux! <...@li.nux.ro>
Subject Re: Regular total loss of connectivity
Date Mon, 01 Jun 2015 21:19:58 GMT
I was using latest stock EL6 , but now am trying kernel 4.x and qemu-rhev from ovirt.org.

Thanks,
Lucian

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

----- Original Message -----
> From: "Rafael Fonseca" <rsafonseca@gmail.com>
> To: dev@cloudstack.apache.org
> Cc: users@cloudstack.apache.org
> Sent: Monday, 1 June, 2015 18:42:23
> Subject: Re: Regular total loss of connectivity

> There are also a few kvm bugs which could be related, what kernel and
> qemu-kvm versions are you running?
> 
> Rafael
> 
> On Mon, Jun 1, 2015 at 7:23 PM, Simon Weller <sweller@ena.com> wrote:
> 
>> What does arp show you on the VR when this occurs?
>> Can you isolate this VR to a different physical host and upstream switch?
>> If you leave a ping going to some external ip (e.g. 8.8.8.8) from the VR,
>> do you still lose connectivity?
>>
>> ________________________________________
>> From: Nux! <nux@li.nux.ro>
>> Sent: Monday, June 1, 2015 12:15 PM
>> To: users@cloudstack.apache.org
>> Cc: dev@cloudstack.apache.org
>> Subject: Re: Regular total loss of connectivity
>>
>> Ok, no luck with e1000 either, connectivity is lost after 4 hours (14400
>> sec). That can't be random.
>>
>> Any ideas?
>>
>> --
>> Sent from the Delta quadrant using Borg technology!
>>
>> Nux!
>> www.nux.ro
>>
>> ----- Original Message -----
>> > From: "Nux!" <nux@li.nux.ro>
>> > To: users@cloudstack.apache.org
>> > Cc: dev@cloudstack.apache.org
>> > Sent: Monday, 1 June, 2015 14:35:09
>> > Subject: Re: Regular total loss of connectivity
>>
>> > Nope, it's a regular, non-redundant VR.
>> >
>> > I've switched to using e1000 instead of virtio, waiting for a few hours,
>> so how
>> > it pans out. :-)
>> >
>> > --
>> > Sent from the Delta quadrant using Borg technology!
>> >
>> > Nux!
>> > www.nux.ro
>> >
>> > ----- Original Message -----
>> >> From: "Simon Weller" <sweller@ena.com>
>> >> To: dev@cloudstack.apache.org
>> >> Cc: "Cloudstack Users List" <users@cloudstack.apache.org>
>> >> Sent: Monday, 1 June, 2015 13:32:26
>> >> Subject: Re: Regular total loss of connectivity
>> >
>> >> Is this VR in a redundant pair? If so, does stopping the master and
>> allowing the
>> >> slave to take over allow the flow of traffic to resume?
>> >>
>> >>
>> >> ________________________________________
>> >> From: Nux! <nux@li.nux.ro>
>> >> Sent: Monday, June 1, 2015 6:45 AM
>> >> To: dev@cloudstack.apache.org
>> >> Cc: Cloudstack Users List
>> >> Subject: Re: Regular total loss of connectivity
>> >>
>> >> Thanks Simon,
>> >>
>> >> link up/down has not helped, setting tso etc off on the link has not
>> helped
>> >> either.
>> >> Connectivity is lost as usual after ~4 hours.
>> >>
>> >> I found some suggestions to try and use the e1000 nic instead of
>> virtio, will do
>> >> that.
>> >>
>> >> Lucian
>> >>
>> >> --
>> >> Sent from the Delta quadrant using Borg technology!
>> >>
>> >> Nux!
>> >> www.nux.ro
>> >>
>> >> ----- Original Message -----
>> >>> From: "Simon Weller" <sweller@ena.com>
>> >>> To: "dev" <dev@cloudstack.apache.org>, "Cloudstack Users List"
>> >>> <users@cloudstack.apache.org>
>> >>> Sent: Sunday, 31 May, 2015 22:36:56
>> >>> Subject: Re: Regular total loss of connectivity
>> >>
>> >>> If you ifdown the interface on the router and then ifup it again, does
>> the arp
>> >>> problem resolve itself?
>> >>>
>> >>> We've seen a similar issue before caused by malicious/heavy traffic
>> related to
>> >>> this bug:
>> >>>
>> >>> https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/997978
>> >>>
>> >>> - Si
>> >>> ________________________________________
>> >>> From: Nux! <nux@li.nux.ro>
>> >>> Sent: Sunday, May 31, 2015 4:25 PM
>> >>> To: dev; Cloudstack Users List
>> >>> Subject: Regular total loss of connectivity
>> >>>
>> >>> Hi,
>> >>>
>> >>> Following a power cut, one of my cloudstack deployments is having a
>> really weird
>> >>> problem that I cannot seem to solve on my own.
>> >>> Every 3 hours all the public IPs on the VR stop responding from the
>> Internet.
>> >>> From the VR they are of course all reachable.
>> >>> In the same VLAN as the public IPs there is another physical server,
>> this one
>> >>> can also access the VMs on their IPs just fine.
>> >>>
>> >>> The provider has not found the problem and hints at problems with the
>> cloud
>> >>> platform, however cloudstack worked just fine until the power cut, not
>> to
>> >>> mention the problem persists through HV and ACS upgrades.
>> >>>
>> >>> I'm thinking network side arp issues or something like this, alas I
am
>> not that
>> >>> good with network stuff and don't have access to it anyway.
>> >>>
>> >>> If I reboot the VR once or twice the IPs start working again and the
>> VMs are
>> >>> accessible from the internet.
>> >>>
>> >>> Ideas?
>> >>>
>> >>> Env: CentOS 6, KVM, ACS 44 to 4.5.1, Adv zone
>> >>>
>> >>> Lucian
>> >>>
>> >>> --
>> >>> Sent from the Delta quadrant using Borg technology!
>> >>>
>> >>> Nux!
>> > > > www.nux.ro

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