[Linux-cluster] XEN VM Cluster

[Marcos Ferreira da Silva]

I have a problem when I'm trying to mount the partition.

Where is my mistake?

[root at vserver1 ~]# clustat
Member Status: Quorate

  Member Name                        ID   Status
  ------ ----                        ---- ------
  vserver1.teste.br                    1 Online, Local, rgmanager
  vserver2.teste.br                    2 Offline

  Service Name         Owner (Last)                   State
  ------- ----         ----- ------                   -----
  service:teste        (none)                         stopped

[root at vserver1 ~]# cat /etc/cluster/cluster.conf
<?xml version="1.0" ?>
<cluster alias="cluster1" config_version="19" name="cluster1">
        <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
        <clusternodes>
                <clusternode name="vserver1.teste.br" nodeid="1" votes="1">
                        <fence>
                                <method name="1">
                                        <device name="manual" nodename="vserver1.teste.br"/>
                                </method>
                        </fence>
                </clusternode>
                <clusternode name="vserver2.teste.br" nodeid="2" votes="1">
                        <fence>
                                <method name="1">
                                        <device name="manual" nodename="vserver2.teste.br"/>
                                </method>
                        </fence>
                </clusternode>
        </clusternodes>
        <cman expected_votes="1" two_node="1"/>
        <fencedevices>
                <fencedevice agent="fence_manual" name="manual"/>
        </fencedevices>
        <rm>
                <failoverdomains>
                        <failoverdomain name="gfsaluno" ordered="1" restricted="0">
                                <failoverdomainnode name="vserver1.teste.br" priority="1"/>
                                <failoverdomainnode name="vserver2.teste.br" priority="2"/>
                        </failoverdomain>
                </failoverdomains>
                <resources>
                        <clusterfs device="/dev/VGALUNO/LVAluno" force_unmount="0" fsid="63078" fstype="gfs" mountpoint="/storage/aluno" name="gfsaluno" options=""/>
                </resources>
                <service autostart="1" domain="gfsaluno" name="teste">
                        <clusterfs ref="gfsaluno"/>
                </service>
        </rm>
</cluster>

[root at vserver1 ~]# mount -t gfs /dev/VGALUNO/LVAluno /storage/aluno/
/sbin/mount.gfs: node not a member of the default fence domain
/sbin/mount.gfs: error mounting lockproto lock_dlm

[root at vserver1 ~]# lsmod | grep dlm
lock_dlm               56009  1
gfs2                  522861  1 lock_dlm
dlm                   153185  13 lock_dlm
configfs               62301  2 dlm

[root at vserver1 ~]# gfs_edit /dev/VGALUNO/LVAluno

Block #10                of 31FF000          (superblock)
(1 of 4)
00010000 01161970 00000001 00000000 00000000 [...p............]
00010010 00000064 00000000 0000051D 00000579 [...d...........y]
00010020 00000000 00001000 0000000C 00000010 [................]
00010030 00000000 00000032 00000000 00000032 [.......2.......2]
00010040 00000000 00000033 00000000 00000033 [.......3.......3]
00010050 00000000 00000036 00000000 00000036 [.......6.......6]
00010060 6C6F636B 5F646C6D 00000000 00000000 [lock_dlm........]
00010070 00000000 00000000 00000000 00000000 [................]
00010080 00000000 00000000 00000000 00000000 [................]
00010090 00000000 00000000 00000000 00000000 [................]
000100A0 636C7573 74657231 3A676673 616C756E [cluster1:gfsalun]
000100B0 6F000000 00000000 00000000 00000000 [o...............]

------------------------------
Marcos Ferreira da Silva
Digital Tecnologia
Uberlandia-MG
(34) 9154-0150 / 3226-2534

-------- Mensagem Original --------
> De: jr <johannes.russek at io-consulting.net>
> Enviado: quarta-feira, 6 de fevereiro de 2008 9:07
> Para: marcos at digitaltecnologia.info, linux clustering <linux-cluster at redhat.com>
> Assunto: SPAM-LOW:  Re: [Linux-cluster] XEN VM Cluster
> 
> > How could configure a partition to share a VM config for two machines?
> > Could you send me your cluster.conf for I compare with I want to do?
> 
> no need for my cluster.conf. just use a GFS partition and it will be
> fine. (don't forget to put it into fstab)
> 
> > 
> > Then I need to have a shared partition to put the VMs config, that will be access by other machines, and a physical (LVM in a storage) to put the real machine.
> > Is it correct?
> 
> i don't know what you mean by "real machine", but your guests not only
> need the config, they will also need some storage for their system.
> that's where you need a storage that's connected to your nodes, wether
> it's luns, lvm lvs or image files, no matter. just keep in mind that if
> you are using image files, you need to place them on GFS so that every
> node in your cluster can access them the same.
> 
> > 
> > When I start a VM in a node 1 it will start in a physical device.
> > If I disconnect the node 1, will the vm migrate to node 2?
> > Will the clients connections lose?
> 
> it's just failover, which means that if the cluster sees a problem with
> one of the nodes, the other node will take over it's services, which
> basically means that the vms will be started on the other node.
> that does mean that your clients will get disconnected.
> 
> > 
> > I'm use a HP Storage and a two servers with multipath with emulex fiber channel.
> 
> should be fine.
> 
> johannes