[libvirt-users] Oracle RAC in libvirt+KVM environment

[Timon Wang]

Right now, I found that Windows Failover Cluster needs SCSI-3
Persistent Reservation, I don't know where if virtio-scsi supports
this, according to http://www.ovirt.org/Features/Virtio-SCSI I found
this:

limited flexibility: virtio-blk does not support all possible storage
scenarios. For example, it does not allow SCSI passthrough or
persistent reservations. In principle, virtio-scsi provides anything
that the underlying SCSI target (be it physical storage, iSCSI or the
in-kernel target) supports.

virtio-blk does not support persistent reservations, but virtio-scsi
may surpport.

Another web page which archive mail lists
http://www.spinics.net/lists/target-devel/msg01813.html, which request
virtio-scsi to implement SPC-3 (persistent reservation) feature, but I
can't found any more information about this.

On Tue, Aug 20, 2013 at 2:00 PM, Timon Wang <timonwst at gmail.com> wrote:
> My domain xml is like this:
>
> <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
>   <name>2008-2</name>
>   <uuid>6325d8a5-468d-42e9-b5cb-9a04f5f34e80</uuid>
>   <memory unit='KiB'>524288</memory>
>   <currentMemory unit='KiB'>524288</currentMemory>
>   <vcpu placement='static'>2</vcpu>
>   <os>
>     <type arch='x86_64' machine='pc-i440fx-1.4'>hvm</type>
>   </os>
>   <features>
>     <acpi/>
>     <apic/>
>     <pae/>
>   </features>
>   <clock offset='localtime'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <emulator>/usr/bin/qemu-kvm</emulator>
>     <disk type='file' device='floppy'>
>       <driver name='qemu' type='raw' cache='none'/>
>       <target dev='fda' bus='fdc'/>
>       <readonly/>
>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='raw' cache='none'/>
>       <source file='/home/images/win2008_2_sys'/>
>       <target dev='hda' bus='ide'/>
>       <boot order='3'/>
>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>     </disk>
>     <disk type='file' device='cdrom'>
>       <driver name='qemu' type='raw'/>
>       <source file='/home/isos/windows2008_64r2.iso'/>
>       <target dev='sdc' bus='ide'/>
>       <readonly/>
>       <boot order='1'/>
>       <address type='drive' controller='0' bus='1' target='0' unit='0'/>
>     </disk>
>     <disk type='block' device='disk'>
>       <driver name='qemu' type='raw'/>
>       <source dev='/dev/fedora/q_disk'/>
>       <target dev='sda' bus='virtio'/>
>       <shareable/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0a'
> function='0x0'/>
>     </disk>
>     <controller type='fdc' index='0'/>
>     <controller type='ide' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x1'/>
>     </controller>
>     <controller type='virtio-serial' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> function='0x0'/>
>     </controller>
>     <controller type='usb' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x2'/>
>     </controller>
>     <controller type='pci' index='0' model='pci-root'/>
>     <controller type='scsi' index='0' model='virtio-scsi'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
> function='0x0'/>
>     </controller>
>     <interface type='bridge'>
>       <mac address='52:54:00:71:20:ae'/>
>       <source bridge='br0'/>
>       <target dev='vport2'/>
>       <model type='rtl8139'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
>     </interface>
>     <interface type='network'>
>       <mac address='52:54:00:12:a0:fd'/>
>       <source network='default'/>
>       <model type='rtl8139'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
>     </interface>
>     <serial type='pty'>
>       <target port='0'/>
>     </serial>
>     <console type='pty'>
>       <target type='serial' port='0'/>
>     </console>
>     <input type='tablet' bus='usb'/>
>     <input type='mouse' bus='ps2'/>
>     <graphics type='spice' autoport='yes' listen='0.0.0.0'>
>       <listen type='address' address='0.0.0.0'/>
>     </graphics>
>     <sound model='ac97'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
>     </sound>
>     <video>
>       <model type='qxl' ram='65536' vram='32768' heads='2'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
>     </video>
>     <memballoon model='virtio'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x08'
> function='0x0'/>
>     </memballoon>
>   </devices>
>   <qemu:commandline>
>     <qemu:arg value='-rtc-td-hack'/>
>   </qemu:commandline>
> </domain>
>
>
>
> On 8/19/13, Paolo Bonzini <pbonzini at redhat.com> wrote:
>> Il 15/08/2013 12:01, Timon Wang ha scritto:
>>> Thanks.
>>>
>>> I have read the link you provide, there is another link which tells me
>>> to pass a NPIV discovery lun as a disk, this is seen as a local direct
>>> access disk in windows. RAC and Failure Cluster both consider this
>>> pass through disk as local disk, not a share disk, and the setup
>>> process failed.
>>>
>>> Hyper-v provides a virtual Fiber Channel implementation, so I
>>> wondering if kvm has the same solution like it.
>>
>> Can you include the XML file you are using for the domain?
>>
>> Paolo
>>
>>
>
>
> --
> Focus on: Server Vitualization, Network security,Scanner,NodeJS,JAVA,WWW
> Blog: http://www.nohouse.net



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Blog: http://www.nohouse.net