| Re: Outbound networking failure [message #45523 is a reply to message #45522] |
Wed, 14 March 2012 07:33   |
Andrew Vagin
Messages: 28
Registered: November 2011
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Junior Member |
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On 03/14/2012 11:26 AM, Maoke wrote:
> yes but we still have other troubles with the 2.6.32-042stab044.11. :P
> so we are trying to understand the problem first.
I don't suggest to move on 2.6.32 kernel. I said about
2.6.18-028stabXXX.Y. You can find a last stable 2.6.18 kernel here:
http://download.openvz.org/kernel/branches/rhel5-2.6.18/stab le/
This issue may be already fixed.
> - maoke
>
> 2012/3/14 Andrew Vagin <avagin@parallels.com
> <mailto:avagin@parallels.com>>
>
> 2.6.18-194.3.1.el5.028stab069.6xen is a very old version. Could
> you update it?
>
>
> On 03/14/2012 10:28 AM, Maoke wrote:
>
> sorry if this is more of a Xen problem.
>
> we are running openvz in Xen PVs (kernel
> 2.6.18-194.3.1.el5.028stab069.6xen), and occasionally the
> network of a PV, as well as the PV's hosted containers, at a
> virtual interface is lost. sometimes restarting the network
> can solve the problem but in most cases we have to restart the
> PV. the PVs another virtual interface was working and other
> PVs and the HV keeps working.
>
> detailed observation through tcpdump at the trouble time shows:
> 1. the inbound traffics can be delivered correctly through
> eth0 of the PV until venet0;
> 2. it looks the venet0 is also correctly functioned because
> TCP sync may get response from container and this sync ack can
> be seen at venet0;
> 3. but at the eth0 of PV, we only have seen the TCP sync
> request towards the containers while the sync ack is missing,
> thus TCP state of the container's application remains SYNC_RECV
> 4. if ping the PV, at the eth0, we only have seen the ICMP
> echo requests but the replies are missing.
>
> we didn't encounter the same problem when those openvz stuffs
> were running over physical machine instead of xen.
>
> does anyone have any hints or ideas? thanks a lot in advance.
>
> - maoke
>
>
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