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Re: [virt-tools-list] virt-manager and iSCSI





On Thu, Apr 5, 2012 at 1:30 PM, Eric Blake <eblake redhat com> wrote:
A pool is like a directory (in fact, you can make a pool that wraps a
directory, if you are using files on a file system instead of LUNs in an
iSCSI setup).  A storage volume is the space that can hold a single disk
image (in a directory-based storage pool, each storage volume is a file;
in an iSCSI setup, each LUN is a a storage volume).

You can't have a storage volume without also having a storage pool to
hold the volume.  So you need XML for both.



OK, I have been sort of getting that far in my reading but I still don't know how to make the XML file for my disk :-)

Or, maybe I had it right the first time and my problem is elsewhere.

In short I have this :
[root solexa1 xen]# iscsiadm -m discovery -t sendtargets -p zfs1
192.168.160.250:3260,2 iqn.1986-03.com.sun:02:44ed42e5-747b-eb6c-9273-9cebdd051c64
192.168.160.250:3260,2 iqn.1986-03.com.sun:02:f4f32db3-53b1-422c-c979-c568b1e6227b

Those are 2 disks (iSCSI targets, I guess you would say) on my ZFS server.  The first one is the one I set up a month or so ago and have been using on a VBox VM since then.  On a different physical machine.

The 2nd one I just set up now to test this with virt-manager 

I had created this XML file and used the instructions from Daniel's website to get virt-manager to see it.

<pool type='iscsi'>
    <name>ZFS1</name>
    <source>
        <host name='ZFS1'/>
        <device path='iqn.1986-03.com.sun:02:44ed42e5-747b-eb6c-9273-9cebdd051c64'/>
    </source>
    <target>
        <path>/dev/disk/by-path</path>
    </target>
</pool>

But the disk could not be read for whatever reason.  That is the problem I am trying to solve.

So in the meantime I destroyed that pool.   But I'm guessing now if I make a new XML file with two different <source> declarations I can probably add both disks to the pool, right?  And see them both.

I'll try that now and then mount and use my new test desk and try a fresh install of Ubuntu to see what happens.

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