[Fedora-xen] add 2 lvm to guest with virt-manager

[Mark Nielsen]

oops, I was just advised of the limits when adding multiple logical 
volumes to a VM...
"you can have upto 3 for fullvirt (or 4 if you PXE it instead of CDRM), 
or 16 for paravirt" - thanks Dan B.

Mark

Mark Nielsen wrote:
> Augusto Castelan Carlson wrote:
>> Hi!
>>
>>  
>>> Are you trying to use 2 logical volumes to separate / and /boot inside
>>> the VM, or present 2 logical volumes (which would show up as 2 separate
>>> disks entirely, xvda and xvdb for instance) to the guest from domain-0?
>>>     
>>
>> I'm trying to present 2 logical volumes to the VM.
>>
>>  
>>> If you are trying to present 2 logvols to the VM itself, those will 
>>> show
>>> up as 2 separate disks inside the VM, as I mentioned (xvda, xvdb, or in
>>> HVM sda, sdb, .. you get the idea) and I would wonder why you would 
>>> want
>>> to do that.
>>>     
>>
>> How can I present 2 logvols to the VM?
>>
>> I proposed to my "boss" to present one logvols to the VM and then do
>> the partitioning inside the VM (xvda1 = /home, xvda2 = /groups,...),
>> but he wants to present 2 logvols, one to be used for /home and the
>> other for /groups...
>>
>>   
> OK, well I'm not sure what benefit this would provide you honestly. I 
> am assuming that both logvols you present to the VM are coming from 
> the same storage (be it SAN or local disk). You are lucky (if you 
> insist on using virt-manager), however, in that it's /groups you want 
> to partition off. You could simply install the system as normal with 
> /, /boot, /home, et al, residing on xvda. Then you shut the VM down, 
> edit the config file for the VM to add the second logical volume as 
> xvdb, start the VM back up and fdisk/partition/format and create your 
> logical volumes as you would normally. Think of it as installing a new 
> box, then shutting it down to physically add a new hard disk. It makes 
> things a little easier it you think of VMs as being just like any 
> other server, the same thing you'd do to a physical box you have to 
> pretty much do with a VM (there are exceptions, block attach, etc) but 
> the hardware is just "virtual" vs. physical.
>
> OR -- simpy use virt-install. It's a cmd line based too, but I find 
> faster and simpler to use. The -f flag is used to present a disk, you 
> just add -f as many times for as many logical volumes you want to 
> present. I would expect that it orders them just as you do on the 
> command line.
>> Do you believe that is better to present only one logvols? If so,
>> please tell me, maybe a can convince him about use only one.
>>
>>   
> I add 2 logical volumes all the time to just about every VM I have, 
> but I typically do it because the LV in question is shared among VMs 
> with GFS partitions inside the VM in a cluster of virtual systems :) 
> again, just add -f as many times as you want using virt-install.
>> Thanks!
>>
>> Regards,
>> Augusto
>>   
>
> --
> Fedora-xen mailing list
> Fedora-xen at redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-xen
>   

-------------- next part --------------
A non-text attachment was scrubbed...
Name: mnielsen.vcf
Type: text/x-vcard
Size: 177 bytes
Desc: not available
Url : http://lists.fedoraproject.org/pipermail/xen/attachments/20080111/9f395578/attachment.vcf