Re: [ovirt-users] oVirt Nested Virtualization

[Sandro Bonazzola]

On Mon, Mar 6, 2017 at 9:20 AM, Luca 'remix_tj' Lorenzetto <
lorenzetto.l...@gmail.com> wrote:

> On Sun, Mar 5, 2017 at 2:43 PM, Barak Korren  wrote:
> > oVirt system tests are indeed using nested virtualization, but it is
> > done to run oVirt nested on top of a stand-alone KVM host, and not to
> > run nested stuff on top of oVirt.
> >
> > The steps Fred specified can be done manually on all hosts, but oVirt
> > offers a slightly more automated alternative. Simply install the
> > following vdsm hooks (available as packages) on all hosts:
> >
> > vdsm-hook-macspoof
> > vdsm-hook-nestedvt
> >
> > And then reboot the hosts (You will need to put hosts into maintenance
> > mode to do that).
> >
>
> Hello,
>
> the packages you're referring are not available through yum on hosts.
> I've seen that only specific packages are included from repos, does
> these packages are excluded?
>

ovirt-node is designed to just update itself as a firmware.
any additional packages is treated as 3rd party rpm which will be persisted
on upgrade.
In order to install the hooks on node you need to enable the ovirt
repositories in /etc/yum.repos.d

For installing the hooks on al new hosts during deploy you can do on the
engine host / vm:
# echo  vdsm-hook-macspoof >
/usr/share/ovirt-host-deploy/plugins/ovirt-host-deploy/vdsmhooks/packages.d/vdsm-hook-macspoof.centos
# echo  vdsm-hook-nestedvt >
/usr/share/ovirt-host-deploy/plugins/ovirt-host-deploy/vdsmhooks/packages.d/vdsm-hook-nestedvt.centos

And whenever you'll add a new node, those packages will be installed. Just
remember to enable the repository before adding the new host to the engine.
Packages and configuration will be persisted on upgrade.




>
> Luca
>
>
>
> --
> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare
> calcoli che potrebbero essere affidati a chiunque se si usassero delle
> macchine"
> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
>
> "Internet è la più grande biblioteca del mondo.
> Ma il problema è che i libri sono tutti sparsi sul pavimento"
> John Allen Paulos, Matematico (1945-vivente)
>
> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <
> lorenzetto.l...@gmail.com>
>



-- 
Sandro Bonazzola
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See how it works at redhat.com
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Re: [ovirt-users] oVirt Nested Virtualization

[Nir Soffer]

On Mon, Mar 6, 2017 at 11:56 AM, Barak Korren  wrote:
> On 6 March 2017 at 10:20, Luca 'remix_tj' Lorenzetto
>  wrote:
>>> The steps Fred specified can be done manually on all hosts, but oVirt
>>> offers a slightly more automated alternative. Simply install the
>>> following vdsm hooks (available as packages) on all hosts:
>>>
>>> vdsm-hook-macspoof
>>> vdsm-hook-nestedvt
>>>
>>> And then reboot the hosts (You will need to put hosts into maintenance
>>> mode to do that).
>>>
>>
>> Hello,
>>
>> the packages you're referring are not available through yum on hosts.
>> I've seen that only specific packages are included from repos, does
>> these packages are excluded?
>
> Those packages should be available from the oVirt repos as they are
> built together with the vdsm package. Perhaps node has special
> exclusions. Referring again to the node maintainers. Sandro? Fabian?

+Ryan (working now on node)

>
>
> --
> Barak Korren
> bkor...@redhat.com
> RHCE, RHCi, RHV-DevOps Team
> https://ifireball.wordpress.com/
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Re: [ovirt-users] oVirt Nested Virtualization

[Barak Korren]

On 6 March 2017 at 10:20, Luca 'remix_tj' Lorenzetto
 wrote:
>> The steps Fred specified can be done manually on all hosts, but oVirt
>> offers a slightly more automated alternative. Simply install the
>> following vdsm hooks (available as packages) on all hosts:
>>
>> vdsm-hook-macspoof
>> vdsm-hook-nestedvt
>>
>> And then reboot the hosts (You will need to put hosts into maintenance
>> mode to do that).
>>
>
> Hello,
>
> the packages you're referring are not available through yum on hosts.
> I've seen that only specific packages are included from repos, does
> these packages are excluded?

Those packages should be available from the oVirt repos as they are
built together with the vdsm package. Perhaps node has special
exclusions. Referring again to the node maintainers. Sandro? Fabian?


-- 
Barak Korren
bkor...@redhat.com
RHCE, RHCi, RHV-DevOps Team
https://ifireball.wordpress.com/
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Re: [ovirt-users] oVirt Nested Virtualization

[Luca 'remix_tj' Lorenzetto]

On Sun, Mar 5, 2017 at 2:43 PM, Barak Korren  wrote:
> oVirt system tests are indeed using nested virtualization, but it is
> done to run oVirt nested on top of a stand-alone KVM host, and not to
> run nested stuff on top of oVirt.
>
> The steps Fred specified can be done manually on all hosts, but oVirt
> offers a slightly more automated alternative. Simply install the
> following vdsm hooks (available as packages) on all hosts:
>
> vdsm-hook-macspoof
> vdsm-hook-nestedvt
>
> And then reboot the hosts (You will need to put hosts into maintenance
> mode to do that).
>

Hello,

the packages you're referring are not available through yum on hosts.
I've seen that only specific packages are included from repos, does
these packages are excluded?

Luca



-- 
"E' assurdo impiegare gli uomini di intelligenza eccellente per fare
calcoli che potrebbero essere affidati a chiunque se si usassero delle
macchine"
Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)

"Internet è la più grande biblioteca del mondo.
Ma il problema è che i libri sono tutti sparsi sul pavimento"
John Allen Paulos, Matematico (1945-vivente)

Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , 
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Re: [ovirt-users] oVirt Nested Virtualization

[Barak Korren]

oVirt system tests are indeed using nested virtualization, but it is
done to run oVirt nested on top of a stand-alone KVM host, and not to
run nested stuff on top of oVirt.

The steps Fred specified can be done manually on all hosts, but oVirt
offers a slightly more automated alternative. Simply install the
following vdsm hooks (available as packages) on all hosts:

vdsm-hook-macspoof
vdsm-hook-nestedvt

And then reboot the hosts (You will need to put hosts into maintenance
mode to do that).

Adding Sandro and Fabian to comment about how to persist this
configuration across node-ng updates.

On 5 March 2017 at 14:20, Fred Rolland  wrote:
> Our system tests are using nested virtualization. [1]
> Here the relevant part :
>
> Make sure that virtualization extension is enabled on the CPU, otherwise,
> you might need to enable it in the BIOS. Generally, if virtualization
> extension is disabled, dmesg log would contain a line similar to:
>
> kvm: disabled by BIOS
>
> Verify nested virtualization is enabled
>
> $ cat /sys/module/kvm_intel/parameters/nested
>
>  This command should print `Y` if nested virtualization is enabled,
> otherwise,
>  enable it the following way:
>
>  Edit `/etc/modprobe.d/kvm-intel.conf` and add the following line:
>
> options kvm-intel nested=y
>
> [1]
> http://ovirt-system-tests.readthedocs.io/en/latest/docs/general/installation.html
>
> On Sat, Mar 4, 2017 at 3:46 PM, Luca 'remix_tj' Lorenzetto
>  wrote:
>>
>> Hello,
>>
>> we're installing a small ovirt cluster for hosting some test
>> environments at work. We're interested in testing VM running
>> hypervisors (i.e ovirt itself or a small openstack deployment).
>>
>> Is there any documentation showing how to enable nested virtualization in
>> ovirt?
>>
>>  I've seen that while adding an host to the cluster there is the
>> opportunity to flag "Nested Virtualization" option, but i didn't
>> understand if other packages and configs are required.
>>
>> Our environment is running latest ovirt 4.1 installed with ovirt-node-ng.
>>
>> Luca
>>
>> --
>> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare
>> calcoli che potrebbero essere affidati a chiunque se si usassero delle
>> macchine"
>> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
>>
>> "Internet è la più grande biblioteca del mondo.
>> Ma il problema è che i libri sono tutti sparsi sul pavimento"
>> John Allen Paulos, Matematico (1945-vivente)
>>
>> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net ,
>> 
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>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>
>
>
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>



-- 
Barak Korren
bkor...@redhat.com
RHCE, RHCi, RHV-DevOps Team
https://ifireball.wordpress.com/
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Re: [ovirt-users] oVirt Nested Virtualization

[Fred Rolland]

Our system tests are using nested virtualization. [1]
Here the relevant part :

Make sure that virtualization extension is enabled on the CPU, otherwise,
you might need to enable it in the BIOS. Generally, if virtualization
extension is disabled, dmesg log would contain a line similar to:

kvm: disabled by BIOS

Verify nested virtualization is enabled

$ cat /sys/module/kvm_intel/parameters/nested

 This command should print `Y` if nested virtualization is enabled,
otherwise,
 enable it the following way:

 Edit `/etc/modprobe.d/kvm-intel.conf` and add the following line:

options kvm-intel nested=y

[1]
http://ovirt-system-tests.readthedocs.io/en/latest/docs/general/installation.html

On Sat, Mar 4, 2017 at 3:46 PM, Luca 'remix_tj' Lorenzetto <
lorenzetto.l...@gmail.com> wrote:

> Hello,
>
> we're installing a small ovirt cluster for hosting some test
> environments at work. We're interested in testing VM running
> hypervisors (i.e ovirt itself or a small openstack deployment).
>
> Is there any documentation showing how to enable nested virtualization in
> ovirt?
>
>  I've seen that while adding an host to the cluster there is the
> opportunity to flag "Nested Virtualization" option, but i didn't
> understand if other packages and configs are required.
>
> Our environment is running latest ovirt 4.1 installed with ovirt-node-ng.
>
> Luca
>
> --
> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare
> calcoli che potrebbero essere affidati a chiunque se si usassero delle
> macchine"
> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
>
> "Internet è la più grande biblioteca del mondo.
> Ma il problema è che i libri sono tutti sparsi sul pavimento"
> John Allen Paulos, Matematico (1945-vivente)
>
> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <
> lorenzetto.l...@gmail.com>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
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