9:52 p.m.
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Hello.=0AI'm wondering if it is possible to create VMs with ovirt that have=
scsi disks?=0AI've just installed ovirt 3.2.1 on Fedora 18 and attached an=
ovirt node (the current fedora 18 based version).=0A=0AWhen adding disks t=
o a VM I can chose from the 'IDE' or 'VirtIO' interfaces.=A0 I'd like
a scs=
i option also.=0AMainly because when migrating from vsphere VMs this makes =
things simpler.=0AAlso, my current kickstart installer for various OSes doe=
s not yet handle 'vd' disks.=0ATo add to things I need to install a custom =
filesystem on the vms that wants a scsi disk.=A0 It does a scsi inquiry ear=
ly on in the install phase and will not work in 'vd' disks. ie: 'sg_inq /de=
v/vda' does not work.=0A=0AI also know that the libata driver in recent lin=
ux distributions exposes IDE drives as scsi and allows a scsi enquiry to su=
cceed.=A0 Unfortunately the use case I have required Enterprise Linux 5 and=
in this release IDE disks report as 'hd', whereas scsi disks report as 'sd=
'.=A0 So, I can just use an IDE disk to get around this problem.=0A=0A=0AI =
understand that virt-manager will allow attaching scsi disks to KVM based v=
irtual machines, and that this is made possible by recent changes in libvir=
t.=0A=0AI think we should be encouraging people to use the virtio disks whe=
re possible, but in cases where this is not straightforward ovirt - and RHE=
V - are missing a trick as far as allowing people that have existing vspher=
e setups to fairly easily move to ovirt.=0A=0AIs a 'scsi' interface' option=
for adding virtual disks for VMs on the roadmap?=A0 If not, could it be co=
nsidered?=0A=0AThanks.=0A
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<html><body><div style=3D"color:#000; background-color:#fff;
font-family:lu=
cida console,
sans-serif;font-size:12pt"><div>Hello.</div><div><span>I'm
wo=
ndering if it is possible to create VMs with ovirt that have scsi disks?</s=
pan></div><div style=3D"color: rgb(0, 0, 0); font-size: 16px;
font-family: =
lucida console,sans-serif; background-color: transparent; font-style: norma=
l;"><span>I've just installed ovirt 3.2.1 on Fedora 18 and attached an
ovir=
t node (the current fedora 18 based version).</span></div><div
style=3D"col=
or: rgb(0, 0, 0); font-size: 16px; font-family: lucida console,sans-serif; =
background-color: transparent; font-style:
normal;"><br><span></span></div>=
<div style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family: lucida con=
sole,sans-serif; background-color: transparent; font-style:
normal;"><span>=
When adding disks to a VM I can chose from the 'IDE' or 'VirtIO'
interfaces=
. I'd like a scsi option also.</span></div><div
style=3D"color: rgb(0=
,
0, 0); font-size: 16px; font-family: lucida console,sans-serif; background=
-color: transparent; font-style: normal;"><span>Mainly because when
migrati=
ng from vsphere VMs this makes things simpler.</span></div><div
style=3D"co=
lor: rgb(0, 0, 0); font-size: 16px; font-family: lucida console,sans-serif;=
background-color: transparent; font-style: normal;"><span>Also, my
current=
kickstart installer for various OSes does not yet handle 'vd' disks.</span=
</div><div style=3D"color: rgb(0, 0, 0); font-size:
16px; font-family: luc=
ida console,sans-serif; background-color: transparent;
font-style: normal;"=
<span>To add to things I need to install a custom filesystem on
the vms th=
at wants a scsi disk. It does a scsi inquiry early on in the
install =
phase and will not work in 'vd' disks. ie: '</span><span>sg_inq
/dev/vda' d=
oes not work.</span></div><div style=3D"color: rgb(0, 0, 0);
font-size: 16p=
x; font-family: lucida console,sans-serif; background-color: transparent;
font-style: normal;"><br></div><div style=3D"color: rgb(0, 0,
0); font-siz=
e: 16px; font-family: lucida console,sans-serif; background-color: transpar=
ent; font-style: normal;">I also know that the libata driver in recent linu=
x distributions exposes IDE drives as scsi and allows a scsi enquiry to suc=
ceed. Unfortunately the use case I have required Enterprise Linux 5 a=
nd in this release IDE disks report as 'hd', whereas scsi disks report as '=
sd'. So, I can just use an IDE disk to get around this
problem.<br></=
div><div style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family: lucida=
console,sans-serif; background-color: transparent; font-style: normal;"><b=
r></div><div style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family:
lu=
cida console,sans-serif; background-color: transparent; font-style: normal;=
">I understand that virt-manager will allow attaching scsi disks to KVM bas=
ed virtual machines, and that this is made possible by recent changes in
libvirt.</div><div style=3D"color: rgb(0, 0, 0); font-size: 16px;
font-fam=
ily: lucida console,sans-serif; background-color: transparent; font-style: =
normal;"><br></div><div style=3D"color: rgb(0, 0, 0);
font-size: 16px; font=
-family: lucida console,sans-serif; background-color: transparent; font-sty=
le: normal;">I think we should be encouraging people to use the virtio disk=
s where possible, but in cases where this is not straightforward ovirt - an=
d RHEV - are missing a trick as far as allowing people that have existing v=
sphere setups to fairly easily move to ovirt.</div><div style=3D"color:
rgb=
(0, 0, 0); font-size: 16px; font-family: lucida console,sans-serif; backgro=
und-color: transparent; font-style: normal;"><br></div><div
style=3D"color:=
rgb(0, 0, 0); font-size: 16px; font-family: lucida console,sans-serif; bac=
kground-color: transparent; font-style: normal;">Is a 'scsi'
interface' opt=
ion for adding virtual disks for VMs on the roadmap? If not, could it
be considered?</div><div style=3D"color: rgb(0, 0, 0); font-size: 16px;
fo=
nt-family: lucida console,sans-serif; background-color: transparent; font-s=
tyle: normal;"><br></div><div style=3D"color: rgb(0, 0, 0);
font-size: 16px=
; font-family: lucida console,sans-serif; background-color: transparent; fo=
nt-style: normal;">Thanks.</div><div style=3D"color: rgb(0, 0, 0);
font-siz=
e: 16px; font-family: lucida console,sans-serif; background-color: transpar=
ent; font-style:
normal;"><br><span></span></div></div></body></html>
---847950152-1577495757-1364439137=:4063--
8:29 a.m.
----- Original Message -----
From: "Paul Jansen" <vlaero(a)yahoo.com.au>
To: users(a)ovirt.org
Sent: Wednesday, March 27, 2013 10:52:17 PM
Subject: [Users] scsi disks inside VMs?
Hello.
I'm wondering if it is possible to create VMs with ovirt that have
scsi disks?
I've just installed ovirt 3.2.1 on Fedora 18 and attached an ovirt
node (the current fedora 18 based version).
When adding disks to a VM I can chose from the 'IDE' or
'VirtIO'
interfaces. I'd like a scsi option also.
Mainly because when migrating from vsphere VMs this makes things
simpler.
Also, my current kickstart installer for various OSes does not yet
handle 'vd' disks.
To add to things I need to install a custom filesystem on the vms
that wants a scsi disk. It does a scsi inquiry early on in the
install phase and will not work in 'vd' disks. ie: ' sg_inq
/dev/vda' does not work.
I also know that the libata driver in recent linux distributions
exposes IDE drives as scsi and allows a scsi enquiry to succeed.
Unfortunately the use case I have required Enterprise Linux 5 and in
this release IDE disks report as 'hd', whereas scsi disks report as
'sd'. So, I can just use an IDE disk to get around this problem.
I understand that virt-manager will allow attaching scsi disks to
KVM
based virtual machines, and that this is made possible by recent
changes in libvirt.
I think we should be encouraging people to use the virtio disks
where
possible, but in cases where this is not straightforward ovirt - and
RHEV - are missing a trick as far as allowing people that have
existing vsphere setups to fairly easily move to ovirt.
Is a 'scsi' interface' option for adding virtual disks
for VMs on the
roadmap? If not, could it be considered?
There are plans to add support for virtio-scsi - still paravirtualized but providing a pv
scsi controller that gives us more features - such as passing scsi commands to luns,
allowing more disks per vm etc.
Thanks.
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1 comments
2 participants
participants (2)
-
Andrew Cathrow -
Paul Jansen