Re: [ovirt-users] qemu cgroup_controllers

Monday, 6 June 2016

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Hello Martin,

Thank you for your time. It is clear how to create partition and assign =
it to a VM. But libvirt manipulates with contents of devices.list and I =
didn't find a way to put my devices into devices.list and stop libvirt =
from removing them.

Anyway, it looks like that the best solution will be using oVirt 4.0 =
where scsi pass-through have been fixed.

--
Dmitry Glushenok
Jet Infosystems
http://www.jet.msk.su <http://www.jet.msk.su/>+7-495-411-7601 (ext. =
1237)

...
 6 =D0=B8=D1=8E=D0=BD=D1=8F 2016 =D0=B3., =D0=B2 12:33, Martin
Polednik = <mpolednik(a)redhat.com&gt;
=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0):=

...
=20
 On 03/06/16 14:05 +0300, =D0=94=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D0=B9 =
=D0=93=D0=BB=D1=83=D1=88=D0=B5=D0=BD=D0=BE=D0=BA wrote:
...
> Thank you Martin!
>=20
> Actually I tried the workaround hook, provided in [2], but then VDSM = (oVirt
3.6.6) tries to interpret hostdev in XML as PCI device, which =
leads to:
...
>=20
> ::The vm start process failed
> Traceback (most recent call last):
> File "/usr/share/vdsm/virt/vm.py", line 703, in _startUnderlyingVm
>   self._run()
> File "/usr/share/vdsm/virt/vm.py", line 1949, in _run
>   self._domDependentInit()
> File "/usr/share/vdsm/virt/vm.py", line 1797, in _domDependentInit
>   self._getUnderlyingVmDevicesInfo()
> File "/usr/share/vdsm/virt/vm.py", line 1738, in =
_getUnderlyingVmDevicesInfo
...
>   self._getUnderlyingHostDeviceInfo()
> File "/usr/share/vdsm/virt/vm.py", line 4277, in =
_getUnderlyingHostDeviceInfo
...
>   **self._getUnderlyingDeviceAddress(source))
> TypeError: pci_address_to_name() got an unexpected keyword argument =
'target'
...
>=20
> XML part was:
> <hostdev managed=3D"no" mode=3D"subsystem"
rawio=3D"yes" type=3D"scsi">= 
...
> 	<source>
> 		<adapter name=3D"scsi_host2"/>
> 		<address bus=3D"0" target=3D"1" unit=3D"0"/>
> 	</source>
> </hostdev>
> <hostdev managed=3D"no" mode=3D"subsystem"
rawio=3D"yes" type=3D"scsi">= 
...
> 	<source>
> 		<adapter name=3D"scsi_host2"/>
> 		<address bus=3D"0" target=3D"2" unit=3D"0"/>
> 	</source>
> </hostdev>
>=20
>=20
> As of creating custom partition - by default machine.slice has "a *:* =
rwm" in devices.list. But for every new VM libvirt removes *:* mask and =
fills the list with actually needed devices (as I understand the =
process). For example:
...
>=20
> c 136:* rw
> c 1:3 rw
> c 1:7 rw
> c 1:5 rw
> c 1:8 rw
> c 1:9 rw
> c 5:2 rw
> c 10:232 rw
> c 253:0 rw
> c 10:228 rw
> c 10:196 rw
>=20
> What I'm looking for is a way to tell libvirt about my additional = devices
without breaking oVirt.
...
=20
 The solution would be creating your own partition and somehow (e.g.
 VDSM hook) appending
=20
 <resource>
   <partition>/machine/custom</partition>
 </resource>
=20
 to the libvirt's <domain> element. I'm not sure how feasible creating
 your own partition is though. I've tried the process as follows:
=20
 $ cat ~/create-partition.sh
 # sh ~/create-partition.sh
 for i in blkio cpu,cpuacct cpuset devices freezer memory net_cls = perf_event
...
 do
   mkdir /sys/fs/cgroup/$i/machine.slice/custom.partition
 done
=20
 for i in cpuset.cpus cpuset.mems
 do
   cat /sys/fs/cgroup/cpuset/machine.slice/$i > =
/sys/fs/cgroup/cpuset/machine.slice/custom.partition/$i
...
 done
=20
 (creates /machine/custom partition).
 Now, we can create vdsm before_vm_start hook that will set given = partition
...
 for the VM:
=20
 $ pwd /usr/libexec/vdsm/hooks/before_vm_start
 $ cat 10_cgroups
=20
 #!/usr/bin/python
=20
 import hooking
=20
=20
 def custom_partition(domxml):
   resource =3D domxml.createElement('resource')
   partition =3D domxml.createElement('partition')
   partition_text =3D domxml.createTextNode('/machine/custom')
   partition.appendChild(partition_text)
   resource.appendChild(partition)
=20
   return resource
=20
 domxml =3D hooking.read_domxml()
 domain =3D domxml.getElementsByTagName('domain')[0]
 domain.appendChild(custom_partition(domxml))
 hooking.write_domxml(domxml)
=20
> --
> Dmitry Glushenok
> Jet Infosystems
> http://www.jet.msk.su
> +7-495-411-7601 (ext. 1237)
>=20
>> 3 =D0=B8=D1=8E=D0=BD=D1=8F 2016 =D0=B3., =D0=B2 12:24, Martin = Polednik
<mpolednik(a)redhat.com&gt; =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB=
(=D0=B0):
...
>>=20
>> On 03/06/16 11:48 +0300, =D0=94=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D0=B9 =
=D0=93=D0=BB=D1=83=D1=88=D0=B5=D0=BD=D0=BE=D0=BA wrote:
...
>>> Hello!
>>>=20
>>> Is it possible to tell libvirt to add specific devices to qemu =
cgroup? By somehow enumerating the devices in XML using a hook for =
example.
...
>>> I'm passing scsi-generic disks (/dev/sgX) to VM using
qemucmdline = hook and it doesn't work until I remove "devices" from
=
cgroup_controllers in qemu.conf.
...
>>=20
>> One way to achieve this is creating a hook to generate the scsi = device
...
>> XML instead of modifying qemu cmdline directly. Libvirt
assumes
>> ownership of all devices created in the XML and therefore adds them = to
...
>> the machine cgroup.
>>=20
>> Example of the XML taken from [1]:
>> <devices>
>>  <hostdev mode=3D'subsystem' type=3D'scsi'
sgio=3D'filtered' = rawio=3D'yes'>
...
>>      <source>
>>          <adapter name=3D'scsi_host0'/>
>>          <address bus=3D'0' target=3D'0'
unit=3D'0'/>
>>      </source>
>>      <readonly/>
>>      <address type=3D'drive' controller=3D'0'
bus=3D'0' target=3D'0' = unit=3D'0'/>
...
>>  </hostdev>
>> </devices>
>>=20
>> There is slight issue with this approach outlined in [2].
>>=20
>> If you want to keep the qemu approach, I think creating a custom
>> partition and moving devices there would be the cleanest approach. = In
...
>> this case, [3] could help but I'm not entirely sure if
that would
>> solve the issue.
>>=20
>> [1] https://libvirt.org/formatdomain.html
>> [2] https://bugzilla.redhat.com/show_bug.cgi?id=3D1325485
>> [3] https://libvirt.org/cgroups.html
>>> --
>>> Dmitry Glushenok
>>> Jet Infosystems
>>> http://www.jet.msk.su
>>> +7-495-411-7601 (ext. 1237)
>>>=20
>>> _______________________________________________
>>> Users mailing list
>>> Users(a)ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users 

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<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div class=3D"">Hello Martin,</div><div
class=3D""><br =
class=3D""></div><div class=3D"">Thank you for your
time. It is clear =
how to create partition and assign it to a VM. But libvirt manipulates =
with contents of devices.list and I didn't find a way to put my devices =
into devices.list and stop libvirt from removing them.</div><div =
class=3D""><br class=3D""></div><div
class=3D"">Anyway, it looks like =
that the best solution will be using oVirt 4.0 where scsi pass-through =
have been fixed.</div><br class=3D""><div
class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; orphans: =
auto; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"color: rgb(0, 0, 0); letter-spacing: normal;
=
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"color: rgb(0, 0, 0); letter-spacing: normal;
=
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"color: rgb(0, 0, 0); letter-spacing: normal;
=
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"color: rgb(0, 0, 0); letter-spacing: normal;
=
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div class=3D"">--</div><div
class=3D""><div class=3D"" =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div class=3D"" =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div class=3D"" =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div class=3D"">Dmitry =
Glushenok</div><div class=3D"">Jet Infosystems</div><div
class=3D""><a =
href=3D"http://www.jet.msk.su" =
class=3D"">http://www.jet.msk.su</a></div></div></div></div>+7-495-411-760=
1 (ext. 1237)</div></div></div></div></div></div>
</div>

<br class=3D""><div><blockquote type=3D"cite"
class=3D""><div class=3D"">6=
 =D0=B8=D1=8E=D0=BD=D1=8F 2016 =D0=B3., =D0=B2 12:33, Martin Polednik =
&lt;<a href=3D"mailto:mpolednik@redhat.com" =
class=3D&quot;&quot;&gt;mpolednik(a)redhat.com&lt;/a&gt;&amp;gt;
=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=
=D0=BB(=D0=B0):</div><br class=3D"Apple-interchange-newline"><div
=
class=3D""><span style=3D"font-family: Menlo-Regular; font-size:
13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">On 03/06/16 14:05 +0300,
=
=D0=94=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D0=B9 =D0=93=D0=BB=D1=83=D1=88=D0=B5=D0=
=BD=D0=BE=D0=BA wrote:</span><br style=3D"font-family: Menlo-Regular; =
font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><blockquote type=3D"cite"
style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">Thank you Martin!<br
=
class=3D""><br class=3D"">Actually I tried the workaround
hook, provided =
in [2], but then VDSM (oVirt 3.6.6) tries to interpret hostdev in XML as =
PCI device, which leads to:<br class=3D""><br
class=3D"">::The vm start =
process failed<br class=3D"">Traceback (most recent call last):<br =
class=3D"">File "/usr/share/vdsm/virt/vm.py", line 703, in =
_startUnderlyingVm<br class=3D"">&nbsp;&nbsp;self._run()<br =
class=3D"">File "/usr/share/vdsm/virt/vm.py", line 1949, in
_run<br =
class=3D"">&nbsp;&nbsp;self._domDependentInit()<br
class=3D"">File =
"/usr/share/vdsm/virt/vm.py", line 1797, in _domDependentInit<br =
class=3D"">&nbsp;&nbsp;self._getUnderlyingVmDevicesInfo()<br =
class=3D"">File "/usr/share/vdsm/virt/vm.py", line 1738, in =
_getUnderlyingVmDevicesInfo<br =
class=3D"">&nbsp;&nbsp;self._getUnderlyingHostDeviceInfo()<br =
class=3D"">File "/usr/share/vdsm/virt/vm.py", line 4277, in =
_getUnderlyingHostDeviceInfo<br =
class=3D"">&nbsp;&nbsp;**self._getUnderlyingDeviceAddress(source))<br
=
class=3D"">TypeError: pci_address_to_name() got an unexpected keyword =
argument 'target'<br class=3D""><br class=3D"">XML
part was:<br =
class=3D"">&lt;hostdev managed=3D"no"
mode=3D"subsystem" rawio=3D"yes" =
type=3D"scsi"&gt;<br class=3D""><span
class=3D"Apple-tab-span" =
style=3D"white-space: pre;">	</span>&lt;source&gt;<br
class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:
pre;">	</span><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;">	=
</span>&lt;adapter name=3D"scsi_host2"/&gt;<br
class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:
pre;">	</span><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;">	=
</span>&lt;address bus=3D"0" target=3D"1"
unit=3D"0"/&gt;<br =
class=3D""><span class=3D"Apple-tab-span"
style=3D"white-space: pre;">	=
</span>&lt;/source&gt;<br
class=3D"">&lt;/hostdev&gt;<br =
class=3D"">&lt;hostdev managed=3D"no"
mode=3D"subsystem" rawio=3D"yes" =
type=3D"scsi"&gt;<br class=3D""><span
class=3D"Apple-tab-span" =
style=3D"white-space: pre;">	</span>&lt;source&gt;<br
class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:
pre;">	</span><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;">	=
</span>&lt;adapter name=3D"scsi_host2"/&gt;<br
class=3D""><span =
class=3D"Apple-tab-span" style=3D"white-space:
pre;">	</span><span =
class=3D"Apple-tab-span" style=3D"white-space: pre;">	=
</span>&lt;address bus=3D"0" target=3D"2"
unit=3D"0"/&gt;<br =
class=3D""><span class=3D"Apple-tab-span"
style=3D"white-space: pre;">	=
</span>&lt;/source&gt;<br
class=3D"">&lt;/hostdev&gt;<br class=3D""><br =
class=3D""><br class=3D"">As of creating custom partition -
by default =
machine.slice has "a *:* rwm" in devices.list. But for every new VM =
libvirt removes *:* mask and fills the list with actually needed devices =
(as I understand the process). For example:<br class=3D""><br
class=3D"">c=
 136:* rw<br class=3D"">c 1:3 rw<br class=3D"">c 1:7
rw<br class=3D"">c =
1:5 rw<br class=3D"">c 1:8 rw<br class=3D"">c 1:9 rw<br
class=3D"">c 5:2 =
rw<br class=3D"">c 10:232 rw<br class=3D"">c 253:0
rw<br class=3D"">c =
10:228 rw<br class=3D"">c 10:196 rw<br class=3D""><br
class=3D"">What =
I'm looking for is a way to tell libvirt about my additional devices =
without breaking oVirt.<br class=3D""></blockquote><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">The solution would be creating
=
your own partition and somehow (e.g.</span><br style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">VDSM hook)
appending</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;"
class=3D"">&lt;resource&gt;</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" =
class=3D"">&nbsp;&nbsp;&lt;partition&gt;/machine/custom&lt;/partition&gt;<=
/span><br style=3D"font-family: Menlo-Regular; font-size: 13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Menlo-Regular; font-size:
13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;"
class=3D"">&lt;/resource&gt;</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">to the libvirt's
&lt;domain&gt; =
element. I'm not sure how feasible creating</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">your own partition is though. =
I've tried the process as follows:</span><br style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><br
style=3D"font-family:=
 Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">$ cat =
~/create-partition.sh</span><br style=3D"font-family: Menlo-Regular; =
font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Menlo-Regular;
font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D""># sh =
~/create-partition.sh</span><br style=3D"font-family: Menlo-Regular; =
font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Menlo-Regular;
font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">for i in blkio cpu,cpuacct
=
cpuset devices freezer memory net_cls perf_event</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">do</span><br
style=3D"font-family:=
 Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">&nbsp;&nbsp;mkdir =
/sys/fs/cgroup/$i/machine.slice/custom.partition</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">done</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">for i in cpuset.cpus =
cpuset.mems</span><br style=3D"font-family: Menlo-Regular; font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Menlo-Regular; font-size:
13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">do</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">&nbsp;&nbsp;cat =
/sys/fs/cgroup/cpuset/machine.slice/$i &gt; =
/sys/fs/cgroup/cpuset/machine.slice/custom.partition/$i</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">done</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">(creates /machine/custom =
partition).</span><br style=3D"font-family: Menlo-Regular; font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Menlo-Regular; font-size:
13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">Now, we can create vdsm =
before_vm_start hook that will set given partition</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">for the VM:</span><br
=
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">$ pwd =
/usr/libexec/vdsm/hooks/before_vm_start</span><br style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">$ cat
10_cgroups</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;"
class=3D"">#!/usr/bin/python</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">import
hooking</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">def =
custom_partition(domxml):</span><br style=3D"font-family: Menlo-Regular; =
font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Menlo-Regular;
font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;"
class=3D"">&nbsp;&nbsp;resource =3D =
domxml.createElement('resource')</span><br style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">&nbsp;&nbsp;partition
=3D =
domxml.createElement('partition')</span><br style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;"
class=3D"">&nbsp;&nbsp;partition_text =3D =
domxml.createTextNode('/machine/custom')</span><br
style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" =
class=3D"">&nbsp;&nbsp;partition.appendChild(partition_text)</span><br
=
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" =
class=3D"">&nbsp;&nbsp;resource.appendChild(partition)</span><br
=
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" class=3D"">&nbsp;&nbsp;return =
resource</span><br style=3D"font-family: Menlo-Regular; font-size: 13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><br style=3D"font-family: Menlo-Regular; font-size: 13px;
=
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Menlo-Regular; font-size:
13px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">domxml =3D =
hooking.read_domxml()</span><br style=3D"font-family: Menlo-Regular; =
font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><span style=3D"font-family: Menlo-Regular;
font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">domain =3D =
domxml.getElementsByTagName('domain')[0]</span><br
style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" =
class=3D"">domain.appendChild(custom_partition(domxml))</span><br =
style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D""><span=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; =
display: inline !important;" =
class=3D"">hooking.write_domxml(domxml)</span><br
style=3D"font-family: =
Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><br
style=3D"font-family:=
 Menlo-Regular; font-size: 13px; font-style: normal; font-variant: =
normal; font-weight: normal; letter-spacing: normal; line-height: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><blockquote
type=3D"cite"=
 style=3D"font-family: Menlo-Regular; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D"">--<br=
 class=3D"">Dmitry Glushenok<br class=3D"">Jet
Infosystems<br =
class=3D""><a href=3D"http://www.jet.msk.su" =
class=3D"">http://www.jet.msk.su</a><br
class=3D"">+7-495-411-7601 (ext. =
1237)<br class=3D""><br class=3D""><blockquote
type=3D"cite" class=3D"">3 =
=D0=B8=D1=8E=D0=BD=D1=8F 2016 =D0=B3., =D0=B2 12:24, Martin Polednik =
&amp;lt;mpolednik(a)redhat.com&amp;gt; =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=
=B0):<br class=3D""><br class=3D"">On 03/06/16 11:48
+0300, =
=D0=94=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D0=B9 =D0=93=D0=BB=D1=83=D1=88=D0=B5=D0=
=BD=D0=BE=D0=BA wrote:<br class=3D""><blockquote
type=3D"cite" =
class=3D"">Hello!<br class=3D""><br
class=3D"">Is it possible to tell =
libvirt to add specific devices to qemu cgroup? By somehow enumerating =
the devices in XML using a hook for example.<br class=3D"">I'm passing
=
scsi-generic disks (/dev/sgX) to VM using qemucmdline hook and it =
doesn't work until I remove "devices" from cgroup_controllers in =
qemu.conf.<br class=3D""></blockquote><br
class=3D"">One way to achieve =
this is creating a hook to generate the scsi device<br class=3D"">XML =
instead of modifying qemu cmdline directly. Libvirt assumes<br =
class=3D"">ownership of all devices created in the XML and therefore =
adds them to<br class=3D"">the machine cgroup.<br
class=3D""><br =
class=3D"">Example of the XML taken from [1]:<br =
class=3D"">&lt;devices&gt;<br
class=3D"">&nbsp;&lt;hostdev =
mode=3D'subsystem' type=3D'scsi' sgio=3D'filtered'
rawio=3D'yes'&gt;<br =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;source&gt;<br
=
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;adapt=
er name=3D'scsi_host0'/&gt;<br =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;addre=
ss bus=3D'0' target=3D'0' unit=3D'0'/&gt;<br =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/source&gt;<br
=
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;readonly/&gt;<br
=
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;address
type=3D'drive' =
controller=3D'0' bus=3D'0' target=3D'0'
unit=3D'0'/&gt;<br =
class=3D"">&nbsp;&lt;/hostdev&gt;<br
class=3D"">&lt;/devices&gt;<br =
class=3D""><br class=3D"">There is slight issue with this
approach =
outlined in [2].<br class=3D""><br class=3D"">If you want
to keep the =
qemu approach, I think creating a custom<br class=3D"">partition and =
moving devices there would be the cleanest approach. In<br
class=3D"">this=
 case, [3] could help but I'm not entirely sure if that would<br =
class=3D"">solve the issue.<br class=3D""><br
class=3D"">[1] =
https://libvirt.org/formatdomain.html<br class=3D"">[2] =
https://bugzilla.redhat.com/show_bug.cgi?id=3D1325485<br class=3D"">[3] =
https://libvirt.org/cgroups.html<br class=3D""><blockquote
type=3D"cite" =
class=3D"">--<br class=3D"">Dmitry Glushenok<br
class=3D"">Jet =
Infosystems<br class=3D"">http://www.jet.msk.su<br =
class=3D"">+7-495-411-7601 (ext. 1237)<br class=3D""><br
=
class=3D"">_______________________________________________<br =
class=3D"">Users mailing list<br
class=3D&quot;&quot;&gt;Users(a)ovirt.org&lt;br =
class=3D"">http://lists.ovirt.org/mailman/listinfo/users<...
ckquote></blockquote></div></blockquote></div><br =
class=3D""></body></html>=

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Re: [ovirt-users] qemu cgroup_controllers