[et-mgmt-tools] koan --virt: lvm support

[Michael DeHaan]

Johan Huysmans wrote:
> well... it is possible ;)
> because we are allready doing this for over a year.
>   

The word on the street (from Dan Berrange) is that this feature is not 
guaranteed to work in future
versions of Xen. 

--Michael

> And the installation is quite simple:
> * you create your logical volumes in the dom0 and mount them
> * you install a minimal system with yum --installroot=
> * you create a xen config where you map the logical volumes to the
> partition inside the domU.
>
> The installation instructions can be found on my blog:
> http://www.raskas.be/blog/howtos/centos-base-image/
>
> And this is how the disk section of my xen config looks like:
> disk = ['phy:vm_volumes/root-host1,sda1,w'
>         ,'phy:vm_volumes/swap-host1,sda2,w'
>         ,'phy:vm_volumes/tmp-host1,sda3,w'
>         ,'phy:vm_volumes/varlog-host1,sda6,w'
>         ,'phy:vm_volumes/home-host1,sda7,w'
>         ]
>
> It would be really great if this would be possible to do with koan,
> for now we do this with our own create vhost script.
>
> Greetings,
> Johan
>
> On 9/4/07, Michael DeHaan <mdehaan at redhat.com> wrote:
>   
>> Johan Huysmans wrote:
>>     
>>> I noticed the koan parameter --virt-path and tried creating a vhost
>>> with following command:
>>> koan --server <some-ip> --virt --profile CentOS5-xen-i386 -P VolGroup00
>>>
>>> The profile and kickstart files are generated by an import from the CentOs5 DVD.
>>>
>>> This command creates 1 lv. The domU uses this as a disk (xvda) and
>>> creates partitions on this.
>>> It is working, but not really the thing i want.
>>>
>>> I want that koan will create multiple lv's on the dom0. Each lv on
>>> dom0 is a partition on domU. This means that the lv is directly
>>> formatted in the dom0, and you can mount that logical volume like a
>>> normal lv (it IS a normal volume) in the dom0.
>>>
>>> Is this (allready) possible with koan (or virt-inst)?
>>>
>>>       
>> I believe you are stuck with the extra level of indirection -- that is
>> that partitions in your host (dom0) appear
>> as disks in your domU -- with both tools.   I don't think you can feed a
>> partition up without a corresponding virtual disk :)
>>
>> (Note that you don't have to use LVM for this -- regular partitions work
>> too)
>>
>> --Michael
>>
>>
>>
>>
>>
>>
>>
>>     
>>> Greetings,
>>> Johan Huysmans
>>>
>>>
>>> On 9/4/07, Michael DeHaan <mdehaan at redhat.com> wrote:
>>>
>>>       
>>>> Johan Huysmans wrote:
>>>>
>>>>         
>>>>> Hi All,
>>>>>
>>>>> In March this year Fred posted a request on this mailinglist:
>>>>> http://www.redhat.com/archives/et-mgmt-tools/2007-March/msg00119.html
>>>>>
>>>>>
>>>>>           
>>>> Implemented.
>>>>
>>>> See the documentation for --virt-path in the koan manpage.
>>>>
>>>>
>>>>
>>>>         
>>>>> What is the status of this request, is it working in the latest version of koan?
>>>>>
>>>>> I noticed that it is now possible to use a logical volume as a disk,
>>>>> but it is also possible to use logical volumes on dom0 as partitions
>>>>> on domU?
>>>>>
>>>>>
>>>>>           
>>>> There are three ways storage can be specified:
>>>>
>>>> -- basic disk images on the filesystem (default behavior)
>>>> -- specifying a logical volume group that has free space in it, where
>>>> then koan will carve a paritition out of it named after the virtual machine
>>>> This allows for using a common LVM group for all your virtual machines,
>>>> which is rather useful.
>>>> -- specifying a specific partition for koan to use as storage.
>>>>
>>>> I hope that answers the question!
>>>>
>>>> Recently a few folks have been asking for ways to specify multiple
>>>> "disks" for their configurations ... and that's something I am going to
>>>> be looking at.
>>>>
>>>>
>>>>         
>>>>> Thanks for the information,
>>>>> Johan Huysmans
>>>>>
>>>>> _______________________________________________
>>>>> et-mgmt-tools mailing list
>>>>> et-mgmt-tools at redhat.com
>>>>> https://www.redhat.com/mailman/listinfo/et-mgmt-tools
>>>>>
>>>>>
>>>>>           
>>>> _______________________________________________
>>>> et-mgmt-tools mailing list
>>>> et-mgmt-tools at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/et-mgmt-tools
>>>>
>>>>
>>>>         
>>> _______________________________________________
>>> et-mgmt-tools mailing list
>>> et-mgmt-tools at redhat.com
>>> https://www.redhat.com/mailman/listinfo/et-mgmt-tools
>>>
>>>       
>> _______________________________________________
>> et-mgmt-tools mailing list
>> et-mgmt-tools at redhat.com
>> https://www.redhat.com/mailman/listinfo/et-mgmt-tools
>>
>>     
>
> _______________________________________________
> et-mgmt-tools mailing list
> et-mgmt-tools at redhat.com
> https://www.redhat.com/mailman/listinfo/et-mgmt-tools
>