I was trying to to do an install onto an existing logical volume,
VolVirt/el5test. I have not found any documentation on the use of the
logical volumes, so I set virt-path to VolVirt/el5test
But i got an error saying "The volume group [VolVirt/el5test] does not
exist."
I have looked at the koan code app.py, calc_virt_path2.
It first checks to see if the volume group exists.
It runs /usr/sbin/vgs -o vg_name which correctly lists the volume groups.
VG
VolGroup00
VolVirt
But It then searches the list of volume groups looking for
VolVirt/el5test, which of course fails, it should be spliting the
location string and only looking for the volume group name.
Reading on, It then checks the size of the volume group by running
/usr/sbin/vgs --noheadings -o vg_free --units g VolVirt/el5test
Which also fails as it is expecting just the volume group name "VolVirt"
After this it starts to check the logical volume.
It correctly runs lvs -o lv_name VolVirt/el5test
LV
el5test
It now defines the logical volume name as Wed_Feb_27_14_19_24_2008-disk0
(The date is inserted as i have not defined a system name.)
Now the logical volume is created with the command /usr/sbin/lvcreate -L
5G -n Wed_Feb_27_14_19_24_2008-disk0 VolVirt/el5test
Which fails.
-----
So from this i can see that when using logical volumes the volume names
are defined by setting the virt-path to the volume group name and the
logical volume name will be sytstemName-disk0
If the calc_virt_path2 function was modified slightly, to first split
the location on / and using the first part as the volume group name, and
then if the second part is not null set the logical volume name to the
second part, else use the default name.
It would be possible to also explicitly specify the logical volume in
the virt-path using the form volumeGroup/logicalVolume
I would submit a patch to do it, but im not a python programmer.
regards
Adrian Revill
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