1:15 p.m.
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I'm trying to use the vhostmd vdsm host to access ovirt node metrics from w=
ithin a VM. Vhostmd is running and updating the /dev/shm/vhostmd0 on the ov=
irt node.
The part I'm stuck on is: "This disk image is exported read-only to guests.=
Guests can read the disk image to see metrics" from http://www.ovirt.org/d=
evelop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I don't see any new read-only device moun=
ted in the guest. Is there additional work I need to do to mount this and a=
ccess the data from within the guest?
Many thanks,
Simon
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link=3D"#0563C1" vlink=3D"#954F72" <div
class=3D"WordSection1" <p
class=3D"MsoNormal">I’m trying to use the vhostmd vdsm host to
acc=
ess ovirt node metrics from within a VM. Vhostmd is running and updating th=
e /dev/shm/vhostmd0 on the ovirt node.<o:p></o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p class=3D"MsoNormal">The part I’m
stuck on is: “This disk ima=
ge is exported read-only to guests. Guests can read the disk image to see m=
etrics” from
<a href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhost...
o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p class=3D"MsoNormal">Does the hook do this by
default? I don’t see =
any new read-only device mounted in the guest. Is there additional work I n=
eed to do to mount this and access the data from within the guest?<o:p></o:=
p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p class=3D"MsoNormal">Many
thanks,<o:p></o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p
class=3D"MsoNormal">Simon<o:p></o:p></p </div
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6:02 p.m.
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--------------080601030306010607090205
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Hi Simon,
You will need to have vhostmd running on the oVirt node and set the
"sap_agent" custom property for the vm as you may see on the screenshot.
sap_agent
Arsène
On 04/15/2016 12:15 PM, Simon Barrett wrote:
Im trying to use the vhostmd vdsm host to access ovirt node metrics
from within a VM. Vhostmd is running and updating the
/dev/shm/vhostmd0 on the ovirt node.
The part Im stuck on is: This disk image is exported read-only to
guests. Guests can read the disk image to see metrics from
http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I dont see any new read-only device
mounted in the guest. Is there additional work I need to do to mount
this and access the data from within the guest?
Many thanks,
Simon
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--------------080601030306010607090205
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Hi Simon,<br>
<br>
You will need to have vhostmd running on the oVirt node and set the
"sap_agent" custom property for the vm as you may see on the
screenshot.<br>
<br>
<img alt="sap_agent"
src="cid:part1.05000603.06090803@unibas.ch"
height="125" width="664"><br>
<br>
Arsène<br>
<br>
<div class="moz-cite-prefix">On 04/15/2016 12:15 PM, Simon Barrett
wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">Im trying to use the vhostmd vdsm host to
access ovirt node metrics from within a VM. Vhostmd is running
and updating the /dev/shm/vhostmd0 on the ovirt
node.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The part Im stuck on is: This disk image
is exported read-only to guests. Guests can read the disk
image to see metrics from
<a moz-do-not-send="true"
href="http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd...
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does the hook do this by default? I dont
see any new read-only device mounted in the guest. Is there
additional work I need to do to mount this and access the data
from within the guest?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many
thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
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<br>
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Thanks Ars=E8ne,
I have vhostmd running on the ovirt node and have set the sap_agent to true=
on the VM configuration. I also stopped and started the VM to ensure that =
the config change took effect.
On the oVirt node I see the vhostmd running and see the following entry in =
the qemu-kvm output:
drive file=3D/dev/shm/vhostmd0,if=3Dnone,id=3Ddrive-virtio-disk701,readonly=
=3Don,format=3Draw -device virtio-blk-pci,scsi=3Doff,bus=3Dpci.0,addr=3D0x8=
,drive=3Ddrive-virtio-disk701,id=3Dvirtio-disk701
The part I wasn't quite understanding was how this presented itself on the =
VM but I now see a new disk device "/dev/vdb". If I cat the contents of /de=
v/vdb I now see the information that is provided from the ovirt node, which=
is great news and very useful.
Thanks for your help.
Simon
From: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] On Behalf Of=
Ars=E8ne Gschwind
Sent: Monday, 18 April, 2016 16:03
To: users(a)ovirt.org
Subject: Re: [ovirt-users] vhostmd vdsm-hook
Hi Simon,
You will need to have vhostmd running on the oVirt node and set the "sap_ag=
ent" custom property for the vm as you may see on the screenshot.
[sap_agent]
Ars=E8ne
On 04/15/2016 12:15 PM, Simon Barrett wrote:
I'm trying to use the vhostmd vdsm host to access ovirt node metrics from w=
ithin a VM. Vhostmd is running and updating the /dev/shm/vhostmd0 on the ov=
irt node.
The part I'm stuck on is: "This disk image is exported read-only to guests.=
Guests can read the disk image to see metrics" from http://www.ovirt.org/d=
evelop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I don't see any new read-only device moun=
ted in the guest. Is there additional work I need to do to mount this and a=
ccess the data from within the guest?
Many thanks,
Simon
_______________________________________________
Users mailing list
Users@ovirt.org<mailto:Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" <div class=3D"WordSection1" <p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks Ars=E8ne,<o:p><=
/o:p></span <div
style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in" <p
class=3D"MsoNormal"><b><span
style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> users-bounces(a)ovirt.org
[mailto:users-bou=
nces(a)ovirt.org]
<b>On Behalf Of </b>Ars=E8ne Gschwind<br
<b>Sent:</b> Monday, 18 April, 2016 16:03<br <b>To:</b> users(a)ovirt.org<br <b>Subject:</b> Re: [ovirt-users] vhostmd
vdsm-hook<o:p></o:p></span </div <p
class=3D"MsoNormal"><o:p> </o:p
<br You will need to have vhostmd
running on the oVirt node and set the "s=
ap_agent" custom property for the vm as you may see on the screenshot.=
<br <br <img width=3D"664"
height=3D"125" id=3D"_x0000_i1025" src=3D"cid:image001.p=
ng(a)01D19A1F.384C1930" alt=3D"sap_agent"><br <br Ars=E8ne<span
style=3D"font-size:12.0pt"><o:p></o:p></span <p
class=3D"MsoNormal">On 04/15/2016 12:15 PM, Simon Barrett
wrote:<o:p></o=
:p
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt" <p class=3D"MsoNormal">I’m trying to
use the vhostmd vdsm host to acc=
ess ovirt node metrics from within a VM. Vhostmd is running and updating th=
e /dev/shm/vhostmd0 on the ovirt node.<o:p></o:p
<br <br
<o:p></o:p></span <pre>Users mailing
list<o:p></o:p></pre
<pre><a
href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><o:p></o:p></pre=
<pre><a
href=3D"http://lists.ovirt.org/mailman/listinfo/users">http:...
.ovirt.org/mailman/listinfo/users</a><o:p></o:p></pre </blockquote <p
class=3D"MsoNormal"><span
style=3D"font-size:12.0pt;font-family:"Ti=
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</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">I have vhostmd running=
on the ovirt node and have set the sap_agent to true on the VM configurati=
on. I also stopped and started the VM to ensure that the config change took=
effect.<o:p></o:p></span</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">On the oVirt node I se=
e the vhostmd running and see the following entry in the qemu-kvm output:<o=
:p></o:p></span</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">drive file=3D/dev/shm/=
vhostmd0,if=3Dnone,id=3Ddrive-virtio-disk701,readonly=3Don,format=3Draw -de=
vice virtio-blk-pci,scsi=3Doff,bus=3Dpci.0,addr=3D0x8,drive=3Ddrive-virtio-=
disk701,id=3Dvirtio-disk701<o:p></o:p></span</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">The part I wasn’=
t quite understanding was how this presented itself on the VM but I now see=
a new disk device “/dev/vdb”. If I cat the contents of /dev/vd=
b I now see the information that is provided from the
ovirt node, which is great news and very useful.<o:p></o:p></span</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks for your help.<=
o:p></o:p></span</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Simon<o:p></o:p></span=
</p>
<p class=3D"MsoNormal"><a
name=3D"_MailEndCompose"><span style=3D"color:#1F=
497D"><o:p> </o:p></span></a</p>
<div</p>
</div</p>
<p class=3D"MsoNormal"
style=3D"margin-bottom:12.0pt">Hi Simon,<br</p>
<div</p>
</div</p>
<p class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">The part
I’m stuck on is: “This disk ima=
ge is exported read-only to guests. Guests can read the disk image to see m=
etrics” from
<a href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhost...
o:p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">Does the hook
do this by default? I don’t see =
any new read-only device mounted in the guest. Is there additional work I n=
eed to do to mount this and access the data from within the guest?<o:p></o:=
p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">Many
thanks,<o:p></o:p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p
class=3D"MsoNormal">Simon<o:p></o:p</p>
<p class=3D"MsoNormal"><span
style=3D"font-size:12.0pt;font-family:"Ti=
mes New Roman",serif"><br</p>
<pre>_______________________________________________<o:p></o:p></pre</p>
</div
3:06 p.m.
This is a multi-part message in MIME format.
--------------040808020702070803070800
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
The metric information are available on this additional disk /dev/vdb.
You may install the package vm-dump-metrics and use the command
vm-dump-metrics which will display all metrics in an xml format.
Arsène
On 04/19/2016 10:48 AM, Simon Barrett wrote:
Thanks Arsène,
I have vhostmd running on the ovirt node and have set the sap_agent to
true on the VM configuration. I also stopped and started the VM to
ensure that the config change took effect.
On the oVirt node I see the vhostmd running and see the following
entry in the qemu-kvm output:
drive
file=/dev/shm/vhostmd0,if=none,id=drive-virtio-disk701,readonly=on,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk701,id=virtio-disk701
The part I wasnt quite understanding was how this presented itself on
the VM but I now see a new disk device /dev/vdb. If I cat the
contents of /dev/vdb I now see the information that is provided from
the ovirt node, which is great news and very useful.
Thanks for your help.
Simon
*From:*users-bounces@ovirt.org [mailto:users-bounces@ovirt.org] *On
Behalf Of *Arsène Gschwind
*Sent:* Monday, 18 April, 2016 16:03
*To:* users(a)ovirt.org
*Subject:* Re: [ovirt-users] vhostmd vdsm-hook
Hi Simon,
You will need to have vhostmd running on the oVirt node and set the
"sap_agent" custom property for the vm as you may see on the screenshot.
sap_agent
Arsène
On 04/15/2016 12:15 PM, Simon Barrett wrote:
Im trying to use the vhostmd vdsm host to access ovirt node
metrics from within a VM. Vhostmd is running and updating the
/dev/shm/vhostmd0 on the ovirt node.
The part Im stuck on is: This disk image is exported read-only
to guests. Guests can read the disk image to see metrics from
http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I dont see any new read-only
device mounted in the guest. Is there additional work I need to do
to mount this and access the data from within the guest?
Many thanks,
Simon
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
--------------040808020702070803070800
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<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
The metric information are available on this additional disk
/dev/vdb. You may install the package vm-dump-metrics and use the
command vm-dump-metrics which will display all metrics in an xml
format.<br>
<br>
Arsène<br>
<br>
<div class="moz-cite-prefix">On 04/19/2016 10:48 AM, Simon Barrett
wrote:<br>
</div>
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<p class="MsoNormal"><span
style="color:#1F497D">Thanks
Arsène,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I
have vhostmd
running on the ovirt node and have set the sap_agent to true
on the VM configuration. I also stopped and started the VM
to ensure that the config change took
effect.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">On the oVirt
node I see the vhostmd running and see the following entry
in the qemu-kvm output:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">drive
file=/dev/shm/vhostmd0,if=none,id=drive-virtio-disk701,readonly=on,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk701,id=virtio-disk701<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">The part I
wasnt quite understanding was how this presented itself on
the VM but I now see a new disk device /dev/vdb. If I cat
the contents of /dev/vdb I now see the information that is
provided from the ovirt node, which is great news and very
useful.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Thanks for your
help.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><a moz-do-not-send="true"
name="_MailEndCompose"><span
style="color:#1F497D"><o:p> </o:p></span></a></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="color:windowtext">From:</span></b><span
style="color:windowtext"> <a
class="moz-txt-link-abbreviated"
href="mailto:users-bounces@ovirt.org">users-bounces@ovirt.org</a>
[<a class="moz-txt-link-freetext"
href="mailto:users-bounces@ovirt.org">mailto:users-bounces@ovirt.org</a>]
<b>On Behalf Of </b>Arsène Gschwind<br>
<b>Sent:</b> Monday, 18 April, 2016 16:03<br>
<b>To:</b> <a class="moz-txt-link-abbreviated"
href="mailto:users@ovirt.org">users@ovirt.org</a><br>
<b>Subject:</b> Re: [ovirt-users] vhostmd
vdsm-hook<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi
Simon,<br>
<br>
You will need to have vhostmd running on the oVirt node and
set the "sap_agent" custom property for the vm as you may see
on the screenshot.<br>
<br>
<img id="_x0000_i1025"
src="cid:part2.04050509.01050409@unibas.ch"
alt="sap_agent"
height="125" width="664"><br>
<br>
Arsène<span
style="font-size:12.0pt"><o:p></o:p></span></p>
<div>
<p class="MsoNormal">On 04/15/2016 12:15 PM, Simon Barrett
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Im trying to use the vhostmd vdsm host
to access ovirt node metrics from within a VM. Vhostmd is
running and updating the /dev/shm/vhostmd0 on the ovirt
node.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The part Im stuck on is: This disk
image is exported read-only to guests. Guests can read the
disk image to see metrics from
<a moz-do-not-send="true"
href="http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd...
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Does the hook do this by default? I dont
see any new read-only device mounted in the guest. Is there
additional work I need to do to mount this and access the
data from within the guest?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Many
thanks,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Users mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true"
href="mailto:Users@ovirt.org">Users@ovirt.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
</div>
</blockquote>
<br>
</body>
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Thanks again but how does that work when a VM is configured to have more th=
an one disk?
If I have a VM with a /dev/vda disk and a /dev/vdb disk, when I turn the vh=
ostmd hook on the vm metric device gets created as /dev/vdb and the origin=
al /dev/vdb disk gets bumped to /dev/vdc.
Is that expected behavior? Will that not cause problems?
Thanks,
Simon
From: Ars=E8ne Gschwind [mailto:arsene.gschwind@unibas.ch]
Sent: Tuesday, 19 April, 2016 13:06
To: Simon Barrett <Simon.Barrett(a)tradingscreen.com>; users(a)ovirt.org
Subject: Re: [ovirt-users] vhostmd vdsm-hook
The metric information are available on this additional disk /dev/vdb. You =
may install the package vm-dump-metrics and use the command vm-dump-metrics=
which will display all metrics in an xml format.
Ars=E8ne
On 04/19/2016 10:48 AM, Simon Barrett wrote:
Thanks Ars=E8ne,
I have vhostmd running on the ovirt node and have set the sap_agent to true=
on the VM configuration. I also stopped and started the VM to ensure that =
the config change took effect.
On the oVirt node I see the vhostmd running and see the following entry in =
the qemu-kvm output:
drive file=3D/dev/shm/vhostmd0,if=3Dnone,id=3Ddrive-virtio-disk701,readonly=
=3Don,format=3Draw -device virtio-blk-pci,scsi=3Doff,bus=3Dpci.0,addr=3D0x8=
,drive=3Ddrive-virtio-disk701,id=3Dvirtio-disk701
The part I wasn't quite understanding was how this presented itself on the =
VM but I now see a new disk device "/dev/vdb". If I cat the contents of /de=
v/vdb I now see the information that is provided from the ovirt node, which=
is great news and very useful.
Thanks for your help.
Simon
From: users-bounces@ovirt.org<mailto:users-bounces@ovirt.org> [mailto:users=
-bounces(a)ovirt.org] On Behalf Of Ars=E8ne Gschwind
Sent: Monday, 18 April, 2016 16:03
To: users@ovirt.org<mailto:users@ovirt.org Subject:
Re: [ovirt-users] vhostmd vdsm-hook
Hi Simon,
You will need to have vhostmd running on the oVirt node and set the "sap_ag=
ent" custom property for the vm as you may see on the screenshot.
[sap_agent]
Ars=E8ne
On 04/15/2016 12:15 PM, Simon Barrett wrote:
I'm trying to use the vhostmd vdsm host to access ovirt node metrics from w=
ithin a VM. Vhostmd is running and updating the /dev/shm/vhostmd0 on the ov=
irt node.
The part I'm stuck on is: "This disk image is exported read-only to guests.=
Guests can read the disk image to see metrics" from http://www.ovirt.org/d=
evelop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I don't see any new read-only device moun=
ted in the guest. Is there additional work I need to do to mount this and a=
ccess the data from within the guest?
Many thanks,
Simon
_______________________________________________
Users mailing list
Users@ovirt.org<mailto:Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" <div class=3D"WordSection1" <p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks again but how d=
oes that work when a VM is configured to have more than one disk?<o:p></o:p=
<div
style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in" <p
class=3D"MsoNormal"><b><span
style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Ars=E8ne Gschwind
[mailto:arsene.gschwind=
@unibas.ch]
<br <b>Sent:</b> Tuesday, 19 April, 2016
13:06<br <b>To:</b> Simon Barrett
&lt;Simon.Barrett(a)tradingscreen.com&gt;; users@ovi=
rt.org<br <b>Subject:</b> Re:
[ovirt-users] vhostmd vdsm-hook<o:p></o:p
</div <p
class=3D"MsoNormal"><o:p> </o:p <br
Ars=E8ne<span style=3D"font-size:12.0pt"><o:p></o:p <p
class=3D"MsoNormal">On 04/19/2016 10:48 AM, Simon Barrett
wrote:<o:p></o=
:p
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt" <p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks Ars=E8ne,</span=
><o:p></o:p <div
style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in" <p
class=3D"MsoNormal"><b><span
style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext" <a
href=3D"mailto:users-bounces@ovirt.org">users-bounces@ovirt.org</a>
[<a =
href=3D"mailto:users-bounces@ovirt.org">mailto:users-bounces@ovirt.org</a>]
<b>On Behalf Of </b>Ars=E8ne Gschwind<br
<b>Sent:</b> Monday, 18 April, 2016 16:03<br <b>To:</b> <a
href=3D"mailto:users@ovirt.org">users@ovirt.org</a><br <b>Subject:</b> Re: [ovirt-users] vhostmd
vdsm-hook</span><o:p></o:p </div <p
class=3D"MsoNormal"> <o:p></o:p
<br You will need to have vhostmd
running on the oVirt node and set the "s=
ap_agent" custom property for the vm as you may see on the screenshot.=
<br <br <img border=3D"0"
width=3D"664" height=3D"125" id=3D"_x0000_i1025"
src=3D"c=
id:image001.png@01D19A41.6BC269F0" alt=3D"sap_agent"><br <br Ars=E8ne<o:p></o:p <p
class=3D"MsoNormal">On 04/15/2016 12:15 PM, Simon Barrett
wrote:<o:p></o=
:p
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt" <p class=3D"MsoNormal">I’m trying to
use the vhostmd vdsm host to acc=
ess ovirt node metrics from within a VM. Vhostmd is running and updating th=
e /dev/shm/vhostmd0 on the ovirt node.<o:p></o:p
<br <br
<br </span><o:p></o:p <pre>Users mailing
list<o:p></o:p></pre
<pre><a
href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><o:p></o:p></pre=
<pre><a
href=3D"http://lists.ovirt.org/mailman/listinfo/users">http:...
.ovirt.org/mailman/listinfo/users</a><o:p></o:p></pre </blockquote <p
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</span></p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">If I have a VM with a =
/dev/vda disk and a /dev/vdb disk, when I turn the vhostmd hook on the vm m=
etric device gets created as /dev/vdb and the original /dev/vdb disk =
gets bumped to /dev/vdc.
<o:p></o:p</span></p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Is that expected behav=
ior? Will that not cause problems?<o:p></o:p</span></p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks,<o:p></o:p></sp=
an</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"><o:p> </o:p></spa=
n</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Simon<o:p></o:p></span=
</p>
<p class=3D"MsoNormal"><a
name=3D"_MailEndCompose"><span style=3D"color:#1F=
497D"><o:p> </o:p></span></a</p>
<div</span></p>
</div</p>
<p class=3D"MsoNormal"
style=3D"margin-bottom:12.0pt">The metric informatio=
n are available on this additional disk /dev/vdb. You may install the packa=
ge vm-dump-metrics and use the command vm-dump-metrics which will display a=
ll metrics in an xml format.<br</span></p>
<div</p>
</div</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">I have vhostmd running=
on the ovirt node and have set the sap_agent to true on the VM configurati=
on. I also stopped and started the VM to ensure that the config change took=
effect.</span><o:p></o:p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">On the oVirt node I se=
e the vhostmd running and see the following entry in the qemu-kvm output:</=
span><o:p></o:p</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">drive file=3D/dev/shm/=
vhostmd0,if=3Dnone,id=3Ddrive-virtio-disk701,readonly=3Don,format=3Draw -de=
vice virtio-blk-pci,scsi=3Doff,bus=3Dpci.0,addr=3D0x8,drive=3Ddrive-virtio-=
disk701,id=3Dvirtio-disk701</span><o:p></o:p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">The part I wasn’=
t quite understanding was how this presented itself on the VM but I now see=
a new disk device “/dev/vdb”. If I cat the contents of /dev/vd=
b I now see the information that is provided from the
ovirt node, which is great news and very useful.</span><o:p></o:p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Thanks for your help.<=
/span><o:p></o:p</p>
<p
class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D">Simon</span><o:p></o:p=
</p>
<p class=3D"MsoNormal"><span
style=3D"color:#1F497D"> </span><o:p></o:=
p</p>
<div</p>
</div</p>
<p class=3D"MsoNormal"
style=3D"margin-bottom:12.0pt">Hi Simon,<br</p>
<div</p>
</div</p>
<p class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">The part
I’m stuck on is: “This disk ima=
ge is exported read-only to guests. Guests can read the disk image to see m=
etrics” from
<a href=3D"http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhost...
o:p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">Does the hook
do this by default? I don’t see =
any new read-only device mounted in the guest. Is there additional work I n=
eed to do to mount this and access the data from within the guest?<o:p></o:=
p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p class=3D"MsoNormal">Many
thanks,<o:p></o:p</p>
<p
class=3D"MsoNormal"> <o:p></o:p</p>
<p
class=3D"MsoNormal">Simon<o:p></o:p</p>
<p class=3D"MsoNormal"><span
style=3D"font-size:12.0pt;font-family:"Ti=
mes New Roman ,serif",serif"><br</p>
<pre>_______________________________________________<o:p></o:p></pre</p>
</blockquote</span></p>
</div
8:09 p.m.
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I've never tried with 2 disks but I will assume that the next free
available disk will be used by the vdsm hook and the vm-dump-metrics cmd
will check the kind of disk.
Let me know if you give a try....
thanks,
Arsène
On 04/19/2016 02:43 PM, Simon Barrett wrote:
Thanks again but how does that work when a VM is configured to have
more than one disk?
If I have a VM with a /dev/vda disk and a /dev/vdb disk, when I turn
the vhostmd hook on the vm metric device gets created as /dev/vdb and
the original /dev/vdb disk gets bumped to /dev/vdc.
Is that expected behavior? Will that not cause problems?
Thanks,
Simon
*From:*Arsène Gschwind [mailto:arsene.gschwind@unibas.ch]
*Sent:* Tuesday, 19 April, 2016 13:06
*To:* Simon Barrett <Simon.Barrett(a)tradingscreen.com>; users(a)ovirt.org
*Subject:* Re: [ovirt-users] vhostmd vdsm-hook
The metric information are available on this additional disk /dev/vdb.
You may install the package vm-dump-metrics and use the command
vm-dump-metrics which will display all metrics in an xml format.
Arsène
On 04/19/2016 10:48 AM, Simon Barrett wrote:
Thanks Arsène,
I have vhostmd running on the ovirt node and have set the
sap_agent to true on the VM configuration. I also stopped and
started the VM to ensure that the config change took effect.
On the oVirt node I see the vhostmd running and see the following
entry in the qemu-kvm output:
drive
file=/dev/shm/vhostmd0,if=none,id=drive-virtio-disk701,readonly=on,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk701,id=virtio-disk701
The part I wasnt quite understanding was how this presented
itself on the VM but I now see a new disk device /dev/vdb. If I
cat the contents of /dev/vdb I now see the information that is
provided from the ovirt node, which is great news and very useful.
Thanks for your help.
Simon
*From:*users-bounces@ovirt.org <mailto:users-bounces@ovirt.org>
[mailto:users-bounces@ovirt.org] *On Behalf Of *Arsène Gschwind
*Sent:* Monday, 18 April, 2016 16:03
*To:* users(a)ovirt.org <mailto:users@ovirt.org>
*Subject:* Re: [ovirt-users] vhostmd vdsm-hook
Hi Simon,
You will need to have vhostmd running on the oVirt node and set
the "sap_agent" custom property for the vm as you may see on the
screenshot.
sap_agent
Arsène
On 04/15/2016 12:15 PM, Simon Barrett wrote:
Im trying to use the vhostmd vdsm host to access ovirt node
metrics from within a VM. Vhostmd is running and updating the
/dev/shm/vhostmd0 on the ovirt node.
The part Im stuck on is: This disk image is exported
read-only to guests. Guests can read the disk image to see
metrics from
http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd/
Does the hook do this by default? I dont see any new
read-only device mounted in the guest. Is there additional
work I need to do to mount this and access the data from
within the guest?
Many thanks,
Simon
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
--------------010207050909040904000208
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http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
I've never tried with 2 disks but I will assume that the next free
available disk will be used by the vdsm hook and the vm-dump-metrics
cmd will check the kind of disk.<br>
Let me know if you give a try....<br>
<br>
thanks,<br>
Arsène<br>
<br>
<div class="moz-cite-prefix">On 04/19/2016 02:43 PM, Simon Barrett
wrote:<br>
</div>
<blockquote
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<p class="MsoNormal"><span
style="color:#1F497D">Thanks again
but how does that work when a VM is configured to have more
than one disk?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">If I have a VM
with a /dev/vda disk and a /dev/vdb disk, when I turn the
vhostmd hook on the vm metric device gets created as
/dev/vdb and the original /dev/vdb disk gets bumped to
/dev/vdc.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Is that
expected behavior? Will that not cause
problems?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><a moz-do-not-send="true"
name="_MailEndCompose"><span
style="color:#1F497D"><o:p> </o:p></span></a></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="color:windowtext">From:</span></b><span
style="color:windowtext"> Arsène Gschwind
[<a class="moz-txt-link-freetext"
href="mailto:arsene.gschwind@unibas.ch">mailto:arsene.gschwind@unibas.ch</a>]
<br>
<b>Sent:</b> Tuesday, 19 April, 2016 13:06<br>
<b>To:</b> Simon Barrett
<a class="moz-txt-link-rfc2396E"
href="mailto:Simon.Barrett@tradingscreen.com"><Simon.Barrett@tradingscreen.com></a>;
<a class="moz-txt-link-abbreviated"
href="mailto:users@ovirt.org">users@ovirt.org</a><br>
<b>Subject:</b> Re: [ovirt-users] vhostmd
vdsm-hook<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">The
metric
information are available on this additional disk /dev/vdb.
You may install the package vm-dump-metrics and use the
command vm-dump-metrics which will display all metrics in an
xml format.<br>
<br>
Arsène<span
style="font-size:12.0pt"><o:p></o:p></span></p>
<div>
<p class="MsoNormal">On 04/19/2016 10:48 AM, Simon Barrett
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="color:#1F497D">Thanks
Arsène,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">I have
vhostmd running on the ovirt node and have set the
sap_agent to true on the VM configuration. I also stopped
and started the VM to ensure that the config change took
effect.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">On the oVirt
node I see the vhostmd running and see the following entry
in the qemu-kvm output:</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">drive
file=/dev/shm/vhostmd0,if=none,id=drive-virtio-disk701,readonly=on,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk701,id=virtio-disk701</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">The part I
wasnt quite understanding was how this presented itself
on the VM but I now see a new disk device /dev/vdb. If I
cat the contents of /dev/vdb I now see the information
that is provided from the ovirt node, which is great news
and very useful.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">Thanks for
your help.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D">Simon</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="color:windowtext">From:</span></b><span
style="color:windowtext">
<a moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org">users-bounces@ovirt.org</a>
[<a moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org">mailto:users-bounces@ovirt.org</a>]
<b>On Behalf Of </b>Arsène Gschwind<br>
<b>Sent:</b> Monday, 18 April, 2016 16:03<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:users@ovirt.org">users@ovirt.org</a><br>
<b>Subject:</b> Re: [ovirt-users] vhostmd
vdsm-hook</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi
Simon,<br>
<br>
You will need to have vhostmd running on the oVirt node and
set the "sap_agent" custom property for the vm as you may
see on the screenshot.<br>
<br>
<img id="_x0000_i1025"
src="cid:part5.02060400.03080709@unibas.ch"
alt="sap_agent" height="125" width="664"
border="0"><br>
<br>
Arsène<o:p></o:p></p>
<div>
<p class="MsoNormal">On 04/15/2016 12:15 PM, Simon Barrett
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Im trying to use the vhostmd vdsm host
to access ovirt node metrics from within a VM. Vhostmd is
running and updating the /dev/shm/vhostmd0 on the ovirt
node.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The part Im stuck on is: This disk
image is exported read-only to guests. Guests can read the
disk image to see metrics from
<a moz-do-not-send="true"
href="http://www.ovirt.org/develop/developer-guide/vdsm/hook/vhostmd...
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Does the hook do this by default? I
dont see any new read-only device mounted in the guest.
Is there additional work I need to do to mount this and
access the data from within the guest?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Many
thanks,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman ,serif",serif"><br>
<br>
<br>
<br>
</span><o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Users mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true"
href="mailto:Users@ovirt.org">Users@ovirt.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New Roman
,serif",serif"> </span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
</div>
</blockquote>
<br>
</body>
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participants (2)
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Arsène Gschwind -
Simon Barrett