pools, how to use

[Tom Zander]

Hi,

I've set up a new qubes install and created two LVM volume groups. I wanted to try and see how this works with qubes and I tried out the pools concept.

The problem is that I think I did everything according to the docs, but the qvm-create command gives me an error message.

Can someone find out what I did wrong?


sudo vgs -a
VG #PV #LV #SN Attr VSize VFree
Slow 1 1 0 wz--n- 391.51g 391.01g
qubes_dom0 1 2 0 wz--n- 59.33g 37.33g
sudo lvcreate -L 37g -n systems qubes_dom0
sudo lvcreate -L 390.5g -n data Slow
sudo lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
data Slow -wi-a----- 390.50g
adminvm qubes_dom0 -wi-ao---- 22.00g
systems qubes_dom0 -wi-a----- 37.00g

qvm-pool -a qubes_ssd lvm_thin -o volume_group=qubes_dom0,thin_pool=systems,revisions_to_keep=0
qvm-pool -a data lvm_thin -o volume_group=Slow,thin_pool=data,revisions_to_keep=0

qvm-create -P qubes_ssd --template fedora-25 -l green --class AppVM test
app: Error creating VM: b' Logical volume qubes_dom0/systems is not a thin pool.\n'


Any help appreciated!
--
Tom Zander
Blog: https://zander.github.io
Vlog: https://vimeo.com/channels/tomscryptochannel

[Marek Marczykowski-Górecki]

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Hash: SHA256

On Sun, Dec 24, 2017 at 12:57:57AM +0100, 'Tom Zander' via qubes-users wrote:
> Hi,
>
> I've set up a new qubes install and created two LVM volume groups. I wanted to try and see how this works with qubes and I tried out the pools concept.
>
> The problem is that I think I did everything according to the docs, but the qvm-create command gives me an error message.
>
> Can someone find out what I did wrong?
>
>
> sudo vgs -a
> VG #PV #LV #SN Attr VSize VFree
> Slow 1 1 0 wz--n- 391.51g 391.01g
> qubes_dom0 1 2 0 wz--n- 59.33g 37.33g
> sudo lvcreate -L 37g -n systems qubes_dom0
> sudo lvcreate -L 390.5g -n data Slow

You need yo create those as thin pools, not standard volumes. For
example this way:
lvcreate -L 37g --thinpool systems qubes_dom0

> sudo lvs
> LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
> data Slow -wi-a----- 390.50g
> adminvm qubes_dom0 -wi-ao---- 22.00g
> systems qubes_dom0 -wi-a----- 37.00g
>
> qvm-pool -a qubes_ssd lvm_thin -o volume_group=qubes_dom0,thin_pool=systems,revisions_to_keep=0
> qvm-pool -a data lvm_thin -o volume_group=Slow,thin_pool=data,revisions_to_keep=0
>
> qvm-create -P qubes_ssd --template fedora-25 -l green --class AppVM test
> app: Error creating VM: b' Logical volume qubes_dom0/systems is not a thin pool.\n'
>
>
> Any help appreciated!

- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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[Tom Zander]

On Sunday, 24 December 2017 02:09:54 CET Marek Marczykowski-Górecki wrote:
> > sudo lvcreate -L 390.5g -n data Slow
>
> You need yo create those as thin pools, not standard volumes. For
> example this way:
> lvcreate -L 37g --thinpool systems qubes_dom0

Thanks, that fixed it :-)

It took some more puzzling and I now have some VMs on LVM pools instead of
everything as huge files in my dom0 filesystem.

Great success.