[Linux-cluster] XEN VM Cluster

[Ray Charles]

Hi Marcos,

Here are 2 links I found usefull when doing what
you're trying. 

http://www.linux.com/articles/55773

http://sources.redhat.com/cluster/wiki/VMClusterCookbook

I would also say be sure to give some attenttion to
the multicast messages between the hosts, make sure
that multicast is passing throught the switch. Seemed
to be a gotcha for me, and there's docs on that part
floating around.

-Ray



--- Marcos Ferreira da Silva
<marcos at digitaltecnologia.info> wrote:

> I'm trying to do a two node cluster.
> I want start a virtual machine at vserver1 and
> reallocate it to vserver2 if node 1 stop.
> The VM is installed in a shared HP storage.
> This access is made with two Emulex Corporation
> Zephyr-X LightPulse Fibre Channel Host Adapter.
> If I start it manually which xm create its ok in
> both servers.
> The partition is a LVM in /dev/VG2/LV01.
> I install virtual machine directly in this
> partition.
> The names vserver1 e vserv2 are in the /etc/hosts.
> The cluster start but vserver2 join and after appear
> "Member Left".
> 
> I think that my problem is in fence device.
> I don't have any equipament.
> I have only the servers, storage, NICs and Emulex.
> 
> I didn't find any manual for this situation.
> 
>  
>      +--- SWITCH ---+
>      |              |
>      |              |  
> +----------+     +----------+
> | XEN      |     | XEN      |
> |   maq1   |     |          |
> |          |     |          |
> | vserver1 |     | vserver2 |
> +----------+     +----------+
>      |              |
>      |              |
>     +----------------+
>     |  HP Storage    |
>     +----------------+
> 
> 
> 
> My cluster.conf is: 
> 
> <?xml version="1.0"?>
> <cluster alias="cluster1" config_version="13"
> name="cluster1">
>         <fence_daemon clean_start="0"
> post_fail_delay="0" post_join_delay="3"/>
>         <fence_xvmd family="ipv4"
> key_file="/etc/cluster/fence_xvm.key"/>
>         <clusternodes>
>                 <clusternode
> name="vserver1.teste.br" nodeid="1" votes="1">
>                         <fence>
>                                 <method name="1">
>                                         <device
> domain="teste.br" name="maq1"/>
>                                 </method>
>                         </fence>
>                 </clusternode>
>                 <clusternode
> name="vserver2.teste.br" nodeid="2" votes="1">
>                         <fence/>
>                 </clusternode>
>         </clusternodes>
>         <cman expected_votes="1" two_node="1"/>
>         <fencedevices>
>                 <fencedevice agent="fence_xvm"
> name="maq1" auth="none"/>
>         </fencedevices>
>         <rm>
>                 <failoverdomains>
>                         <failoverdomain
> name="fodMaq1" ordered="1" restricted="1">
>                                 <failoverdomainnode
> name="vserver1.teste.br" priority="1"/>
>                                 <failoverdomainnode
> name="vserver2.teste.br" priority="2"/>
>                         </failoverdomain>
>                 </failoverdomains>
>                 <resources/>
>                 <vm autostart="1" domain="fodMaq1"
> exclusive="0" name="maq1" path="/etc/xen"
> recovery="relocate"/>
>         </rm>
> </cluster>
> 
> 
> ------------------------------
> Marcos Ferreira da Silva
> Digital Tecnologia
> Uberlandia-MG
> (34) 9154-0150 / 3226-2534
> 
> 
> 
> --
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> Linux-cluster at redhat.com
>
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> 



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