Re: [Xen-users] bonding on domU

[Donny Brooks <dbrooks@xxxxxxxxxxxxxxxx>]

What you need is two separate things. First is bonding on dom0. Then you need some kind of live failover for the domu's to another dom0. For the failover I would look into drbd or similar.

The reason bonding on the domu won't work is because if the dom0 crashes, what is going to keep the domu running? The domu has to have the dom0 for at least networking.

Donny B.

On 7/13/2010 9:39 PM, dongkyu lee wrote:

I appreciate of your reply.

 

The reason I want to confire bonding on domU is that I have experienced system failure (system crash,hang) serveral times with two bondings on dom0. We suspected single bonding works fine but multiple bonding may cause some problems on xen kernel (dom0). That is why I tried bonding on domU.

 

anyone can tell me why I should not configure bodning on domU?

2010/7/13 Donny Brooks <dbrooks@xxxxxxxxxxxxxxxx>

On 7/12/2010 8:36 PM, dongkyu lee wrote:

One of collegues said that configuring bonding on domU does not make sense because

the virtual nic on domU and virtual bridge on dom0 may not detect netowrk failure.

 

I think that bonding on domU should work with arp such as below:

"options bond0 arp_interval=1000 arp_ip_target=10.25.81.1,10.24.22.70 mode=1 primary=eth1"

 

I tried bonding on domU but it did not work. (domU detected network failure but backup interface did not work properly)

 

Anyone who tried to confiure bonding on bomU? If it worked, would you share bonding configuration files (/etc/modprobe.conf, and ifcfg-*)

 

Thank you in advnace

 

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You are looking at this the wrong way I do believe. Bonding needs to be done on dom0 and just have a single interface on the domu. I am sure someone else can explain better than myself, but you would want the failover functionality to be present on the dom0 so all the domu's benefit, not just one. Just my $0.02.

Donny B.

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