Re: [CentOS-virt] Network isolation for KVM guests

2017-03-31 Thread Sven Kieske
On 31/03/17 15:55, C. L. Martinez wrote:
> I need to attach two physical interfaces to a guest and these phy interfaces 
> have IP and routes assigned and I need to get them off the main routing table.

I do not understand this.

You can attach a physical (or virtual, doesn't matter), interface to any
given vm, without assigning routes or IPs to these interfaces directly.

Just do the network configuration inside the vm, and the routing, well
on your router? You will just need the route for the vm networks on your
host, but what is your attack scenario to keep this separated from other
routes on this host? you need at least CAP_NET_ADMIN to fiddle with those.

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[CentOS-virt] some ovirt packages missing?

2016-09-30 Thread Sven Kieske
Hi,

I just tried to setup ovirt-websocket-proxy.

the package name in the upstream repo is e.g.:

http://resources.ovirt.org/pub/ovirt-3.6/rpm/el7/noarch/ovirt-engine-websocket-proxy-3.6.7.5-1.el7.centos.noarch.rpm

I have the following repos enabled:

yum repolist enabled
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.imt-systems.com
 * epel: mirror.imt-systems.com
 * extras: repo.de.bigstepcloud.com
 * updates: repo.de.bigstepcloud.com
repo id
   repo name
   status
base/7/x86_64
   CentOS-7 - Base
9.007
centos-gluster37/7/x86_64
   CentOS-7 - Gluster 3.7
  139
centos-ovirt36/7/x86_64
   CentOS-7 - oVirt 3.6
  499
centos-qemu-ev/7/x86_64
   CentOS-7 - QEMU EV
   52
epel/x86_64
   Extra Packages for Enterprise Linux 7 - x86_64
   10.626
extras/7/x86_64
   CentOS-7 - Extras
  390
updates/7/x86_64
   CentOS-7 - Updates
2.504
repolist: 23.217



shouldn't this suffice to install the websocket proxy?

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Re: [CentOS-virt] USB 3.0 in qemu-kvm-0.12

2016-03-30 Thread Sven Kieske
On 29/03/16 22:03, Robert Nichols wrote:
> I suspect I know the answer here, but is qemu-kvm-0.12 simply incapable
> of passing a USB 3.0 device to a guest? USB 2 devices work fine, but
> USB 3 -- nothing.  USB 3.0 works fine in the host, of course.
> 
> Currently using qemu-kvm-0.12.1.2-2.479.el6_7.4.x86_64 in CentOS 6.7.
> 
> I'm guessing I have to upgrade to CentOS 7 to pass USB 3.0 devices
> to the guest.  Hoping to avoid that just now.
> 
A quick search for "rhel usb 3 support kvm" leads to this article:

http://www.tecmint.com/redhat-enterprise-linux-7-1-installation/

citing:

"USB 3.0 support enabled in KVM as Technology Preview."

also, reading the release notes of upstream might help:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/7.2_Release_Notes/index.html

if you CTRL+F "usb 3" you can read:

 USB 3.0 host adapter (xHCI) emulation for KVM guests remains a
Technology Preview in Red Hat Enterprise Linux 7.2.

so it is available but not fully supported.

HTH

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Re: [CentOS-virt] [ovirt-users] CEPH rbd support in EL7 libvirt

2015-10-12 Thread Sven Kieske
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Hash: SHA1



On 12/10/15 10:13, Nux! wrote:
> Hi Nir,
> 
> I have not tried to use Ovirt with Ceph, my question was about
> libvirt and was directed to ask the question here, sorry for the
> noise; I understand libvirt is not really ovirt's people concern.
> 
> The thing is qemu can do ceph rbd in EL7, libvirt does not,
> although support seems to be there and a simple rebuild enables
> it. Was hoping you guys know more.
> 
> Lucian

I'd suggest to ask this on the virt-sig of centOS (cc'ed).

Why is there no rbd support in el7 libvirt? I don't know, maybe the
virt repo guys from centos can rebuild it (they already do rebuild
libvirt afaik, another flag might not hurt them ).

HTH


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Re: [CentOS-virt] [!!Mass Mail]Re: iSCSI on CentOS 6

2015-07-14 Thread Sven Kieske
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On 11/07/15 14:47, Miguel Barbosa Gonçalves wrote:
> I just need to know if a CentOS 6 iSCSI target is stable for
> production because after reading this
> 
> "Setting up a Red Hat Enterprise Linux server as an iSCSI target is
> not recommended. The example used in this section should not be
> used in production, and is provided as an example which should only
> be referred to for basic shared storage testing and educational
> purposes."
> 
> ( 
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux
/5/html/Virtualization/sect-Virtualization-Shared_storage_and_virtualiza
tion-Using_iSCSI_for_storing_virtual_disk_images.html#idp17629440

Maybe
> 
don't use docs from ancient past?
Or do you want to use EL 5?
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6
/html/Storage_Administration_Guide/iscsi-target-setup.html

HTH
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Re: [CentOS-virt] Where does virt-manager store config in CentOS 7.1?

2015-04-14 Thread Sven Kieske


On 14/04/15 11:16, C. L. Martinez wrote:
> Hi all,
> 
>  Anyone knows where virt-manager stores user config files in CentOS
> 7.1?? I am not seeing anything in user's home directory 

Hi,

well on my standard machine virt-manager just starts with root
privileges, so the config is where I expect it to be:
/etc/libvirt/qemu/$NAME.xml

HTH

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Re: [CentOS-virt] Reminder: CentOS Virt SIG meeting on IRC today (10 Mar), 2pm GMT

2015-03-10 Thread Sven Kieske
Just a quick question:

Did the last meeting take place?
I did not see any logs/minutes on this mailing list.
Would be cool to get a meetbot in the centos channel, if
there isn't already one.

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Re: [CentOS-virt] Disable/stop nic in a virtual guest with virsh

2015-02-17 Thread Sven Kieske


On 17/02/15 09:18, C. L. Martinez wrote:
> Hi all,
> 
> How can I stop/disable a nic in a virtual guest using a virsh
> command?? I am searching the same effect like if I unplug network
> cable ... Is it possible?? I have tried with "detach-interface"
> command without luck. I don't want to remove the nic from guest
> configuration, only to stop the nic ...

Depending on your network architecture you could just ifdown
the vmnet, but this just works if you don't have multiple
vms on one vmnet (which you shouldn't).

HTH

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Re: [CentOS-virt] Issues with Ubuntu 14 as a guest VM, and network throughput..

2014-09-30 Thread Sven Kieske
I don't know if ubuntu includes all the drivers in the newest versions.
they did for ubuntu 12.04, but they also offer special kernels for
virtualization guests, it might be worth it to check them out.

On 30/09/14 12:44, Howard Leadmon wrote:
>  Your right, I didn't, and I could have sworn I had put that in the message. 
> I am running KVM, and I thought it would seem funny for the virtio stuff to 
> be missing in the Linux kernel, well the newer ones at that.

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Re: [CentOS-virt] Issues with Ubuntu 14 as a guest VM, and network throughput..

2014-09-29 Thread Sven Kieske


On 30/09/14 00:50, Howard Leadmon wrote:
>  I have a CentOS 6.5 server running as a host for about a dozen other VM's,
> and all were running just fine.   I had a mix of CentOS, Ubuntu, and FreeBSD
> VM's running, no problem at all.   
> 
>  I then updated the Ubuntu VM's to the newer 14.x release, and that
> installed a 3.13 linux kernel, and after that (which I didn't notice right
> at the start) the network throughput outbound was abysmal at best.

Hi,

as you already figured out, this seems to be an ubuntu or kernel issue
(maybe virtio drivers are missing in these kernels?).
So it would be best to contact canonical or kernel folks about it.
Furthermore you didn't bother to say if you are running kvm or xen
or something completely different?

HTH

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Re: [CentOS-virt] CentOS ovirt-3.1 repository

2014-09-02 Thread Sven Kieske
Hi,

fyi:

this might be true for old 3.0 versions
but at least since 3.3.z upgrades are stable
and work well. there is just some breakage in rest api
json support from 3.3. to 3.4. but this is due to the fact
that json was not "officially" supported in 3.3

HTH

Am 02.09.2014 02:14, schrieb Hideo Goto:
> But Ovirt is,
> as you know, very update-hostile system: We still have another 3.0 site
> working.

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Re: [CentOS-virt] Masking CPU flags via libvirt xml not working?

2014-09-01 Thread Sven Kieske
Hi,

I guess this is the wrong approach:

Libvirt does manage cpu type in an xml file,
you would have to alter this xml file:

/usr/share/libvirt/cpu_map.xml

HTH

PS: Maybe add an feature request upstream
to enable this for all libvirt users?

I have seen this request quite some time
on different mailing lists.

Am 27.08.2014 20:08, schrieb Nathan March:
> On 8/26/2014 4:52 PM, Nathan March wrote:
>>
>> Has anyone here managed to get cpu masking working via libvirt?
>> Intention to enable VM migrations between hosts of a different CPU
>> generation.
>>
> 
> To add to this, I've tried using the boot options to set the cpu mask 
> instead:
> 
> xen_commandline: dom0_mem=2048M,max:2048M loglvl=all 
> guest_loglvl=all cpuid_mask_ecx=0x009ee3fd cpuid_mask_edx=0xbfebfbff
> 
> Unfortunately still no luck. There's no errors in xm dmesg to indicate 
> the settings were / weren't applied, it simply doesn't seem to do anything.
> 
> - Nathan
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> 
> 

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Re: [CentOS-virt] Fwd: About Centos 7 + Virt-manager

2014-07-16 Thread Sven Kieske
Am 16.07.2014 15:16, schrieb Scott Dowdle:
> Docker dropped LXC with version 0.6 or was it 1.0?  They have their own 
> library that they use now.

This is not correct, or the docker docs are out of date:

"Docker combines these components into a wrapper we call a container
format. The default container format is called libcontainer.Docker also
supports traditional Linux containers using LXC." Source:[1]

[1]https://docs.docker.com/introduction/understanding-docker/#the-underlying-technology

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Re: [CentOS-virt] Fwd: About Centos 7 + Virt-manager

2014-07-16 Thread Sven Kieske
Hi Scott,

while much of what you say is true
you somehow could lead unaware users
to the conclusion that docker and lxc
are two very different container technologies.

In fact, docker uses lxc for containers.
So it's more a management abstraction layer
with an API.

Nevertheless for true and secure containerization
you'll need openvz atm, sadly it's not in the kernel yet.

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Re: [CentOS-virt] Preferred method of provisioning VM images

2014-06-20 Thread Sven Kieske


Am 18.06.2014 23:33, schrieb lee:
> No, I'm talking about an "installer" which can be used to create and to
> configure a VM image.  The resulting VM image would have all needed
> packages installed and be fully configured.

Yes, this is e.g. something you can do with saltstack salt-virt
or similar tools (especially the "fully configured" part).
but you could also use virt-builder/-installer + cloud-init
or various other tools.


> Does "provisioning VM images" not involve their creation?

No, not necessary.

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Re: [CentOS-virt] Preferred method of provisioning VM images

2014-06-18 Thread Sven Kieske
I just dived a little in virt-builder and here are my findings:

1. It's awesome!

Am 18.06.2014 12:46, schrieb George Dunlap:
> So it looks like we might want to recommend three potential paths we
> could recommend people to explore:
> 
> 1) For basic CentOS VMs, use a CentOS-provided cloud image, with our
> custom metadata tweaking script.

2. Why create a custom script if maybe virt-builder can handle it?
   I don't know if you can point virt-builder to other images than
those on libguestfs.org, but this should be possible, include an centos
cloud-image on libguestfs.org and just use virt-builder


> 2) For more versatile image set-up and manipulation (including other
> operating systems), use virt-builder.
> 
> 3) If you're thinking about using libvirt anyway, use virt-install and
> install from installation media.

3. as a fallback if virt-builder is not available or you don't got
the images from libguestfs.org cached or you don't have direct internet
access: ok, for other purposes I guess virt-builder should be enough?

> Does that sound reasonable?

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Re: [CentOS-virt] Preferred method of provisioning VM images

2014-06-18 Thread Sven Kieske


Am 17.06.2014 19:31, schrieb lee:
> How about some sort of package management that lets you define and
> configure the VM?
> 
> This is currently done from "the inside", i. e. when the VM is running,
> with whatever installer and package manager a distribution comes
> with.
> 
> Why not do it from "the outside", i. e. before the VM even exists,
> creating it in the process?  Define some sort of API so that the same
> "VM creator tool" could be used with different distributions.

I believe you are talking about a bootstrapped minimal installation
and than managing this via a config management tool like puppet, chef
etc. ?

Nevertheless I think this gets really off topic and out of scope.

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Re: [CentOS-virt] understanding problems

2014-06-16 Thread Sven Kieske
This is wrong.

A bridge does not need an ip address
itself to pass traffic from interface A
to interface C, so it could look like this:

hw interface a <---> bridge b <---> vm interface c
192.168.1.3 none192.168.1.4

Keep in mind that bridging takes place on layer 2:
https://en.wikipedia.org/wiki/Bridging_%28networking%29

HTH

Am 14.06.2014 08:41, schrieb lee:
> But when you attach them to bridges and don't have IP addresses on the
> bridges, then they are unreachable.

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Re: [CentOS-virt] Call for agenda items for tomorrow's VIRT SIG meeting

2014-05-20 Thread Sven Kieske
Hi,

I'm sorry, but I can't find the info on the wiki:
on which server/ room will the meeting take place?

it isn't mentioned here:
http://wiki.centos.org/SpecialInterestGroup/Virtualization

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Re: [CentOS-virt] p2v conversion questions

2014-05-12 Thread Sven Kieske
And here is the link:
https://alt.fedoraproject.org/pub/alt/virtio-win/

Am 12.05.2014 12:58, schrieb Itamar Heim:
> On 05/06/2014 10:52 AM, Sven Kieske wrote:
>> Quickly scanning some of the files I found some GPLed
>> and some under a weird IBM license (which allows redistribution).
>>
>> I didn't find anything which does not permit redistribution.
>> Maybe you can point me in the right direction?
>>
>> CC'ing Itamar who can maybe give some insight into virtio-win
>> licenses.
>>
> 
> I don't remember the specifics on this one, but the virtio-win drivers
> (available on alt.fedoraproject.org) can be freely redistributed.
> 
>> Am 06.05.2014 14:56, schrieb m...@tdiehl.org:
>>> Hi,
>>>
>>> On Mon, 5 May 2014, Sven Kieske wrote:
>>>
>>>> Am 03.05.2014 22:32, schrieb SilverTip257:
>>>>> Per the RH docs, a RHN subscription is necessary for the virtio-win
>>>>> package.
>>>>
>>>> well the ovirt-project[1]
>>>> will provide this package "soon" (tm).
>>>>
>>>> meanwhile you could try the following:
>>>> (this is a quote from the ovirt-users ML)
>>>>
>>>>> download the src rpm from
>>>>> http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/RHOS/SRPMS/
>>>>> build the rpm
>>>>> rpmbuild --rebuild virtio-win-1.6.8-4.el6.src.rpm
>>>>> install the rpm
>>>>> rpm -Uhv  ~/rpmbuild/RPMS/noarch/virtio-win-1.6.8-4.el6.noarch.rpm
>>>>
>>>> I didn't test it myself, so I don't know if it really works, but
>>>> "it should" (ymmv).
>>>
>>> That is what I was looking for. I never thought to look there. Thank
>>> you.
>>>
>>>>
>>>> [1] http://www.ovirt.org
>>>>
>>>> PS: ovirt is the upstream project of red hat enterprise virtualization
>>>> it would be cool to see some integration work with the centos virt sig!
>>>
>>> I agree that would be nice but as I read the license, it cannot be
>>> redistributed. Obviously, Red Hat can do as they wish, since it is
>>> already
>>> on the ovirt site. I wonder if they will extend that to CentOS?
>>>
>>> OTOH, it is trivial to build the rpm, so I am not sure it is worth
>>> putting
>>> lot of effort into it. The hard part was finding the src.rpm and that
>>> was only
>>> hard because I was looking in the wrong place.
>>>
>>> Regards,
>>>
>>
> 
> 
> 
> 

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Re: [CentOS-virt] p2v conversion questions

2014-05-06 Thread Sven Kieske
Quickly scanning some of the files I found some GPLed
and some under a weird IBM license (which allows redistribution).

I didn't find anything which does not permit redistribution.
Maybe you can point me in the right direction?

CC'ing Itamar who can maybe give some insight into virtio-win
licenses.

Am 06.05.2014 14:56, schrieb m...@tdiehl.org:
> Hi,
> 
> On Mon, 5 May 2014, Sven Kieske wrote:
> 
>> Am 03.05.2014 22:32, schrieb SilverTip257:
>>> Per the RH docs, a RHN subscription is necessary for the virtio-win package.
>>
>> well the ovirt-project[1]
>> will provide this package "soon" (tm).
>>
>> meanwhile you could try the following:
>> (this is a quote from the ovirt-users ML)
>>
>>> download the src rpm from
>>> http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/RHOS/SRPMS/
>>> build the rpm
>>> rpmbuild --rebuild virtio-win-1.6.8-4.el6.src.rpm
>>> install the rpm
>>> rpm -Uhv  ~/rpmbuild/RPMS/noarch/virtio-win-1.6.8-4.el6.noarch.rpm
>>
>> I didn't test it myself, so I don't know if it really works, but
>> "it should" (ymmv).
> 
> That is what I was looking for. I never thought to look there. Thank you.
> 
>>
>> [1] http://www.ovirt.org
>>
>> PS: ovirt is the upstream project of red hat enterprise virtualization
>> it would be cool to see some integration work with the centos virt sig!
> 
> I agree that would be nice but as I read the license, it cannot be
> redistributed. Obviously, Red Hat can do as they wish, since it is already
> on the ovirt site. I wonder if they will extend that to CentOS?
> 
> OTOH, it is trivial to build the rpm, so I am not sure it is worth putting
> lot of effort into it. The hard part was finding the src.rpm and that was only
> hard because I was looking in the wrong place.
> 
> Regards,
> 

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Re: [CentOS-virt] p2v conversion questions

2014-05-06 Thread Sven Kieske
Well, I'd love to, but have not the time atm, sorry.

Am 06.05.2014 13:18, schrieb George Dunlap:
> That sounds great -- were you volunteering? :-)

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Re: [CentOS-virt] BAD disk I/O performance

2014-05-04 Thread Sven Kieske
Hi,

well quickly reading this thread I didn't see anyone
mentioning the I/O scheduler which is the component
with the highest performance impact.

you might want to check you are useing "deadline"
i/o scheduler.

extensive documentation on how to achieve this is
found on the web.

HTH
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Re: [CentOS-virt] p2v conversion questions

2014-05-04 Thread Sven Kieske
Hi,

Am 03.05.2014 22:32, schrieb SilverTip257:
> Per the RH docs, a RHN subscription is necessary for the virtio-win package.

well the ovirt-project[1]
will provide this package "soon" (tm).

meanwhile you could try the following:
(this is a quote from the ovirt-users ML)

> download the src rpm from
> http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/RHOS/SRPMS/
> build the rpm
> rpmbuild --rebuild virtio-win-1.6.8-4.el6.src.rpm
> install the rpm
> rpm -Uhv  ~/rpmbuild/RPMS/noarch/virtio-win-1.6.8-4.el6.noarch.rpm

I didn't test it myself, so I don't know if it really works, but
"it should" (ymmv).

HTH

[1] http://www.ovirt.org

PS: ovirt is the upstream project of red hat enterprise virtualization
it would be cool to see some integration work with the centos virt sig!
:)

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[CentOS-virt] libvirt versions / difference to upstream?

2014-04-22 Thread Sven Kieske
Hi,

I want to upgrade my libvirt version, in order
to get a bugfix from upstream, see this BZ
for details:
https://bugzilla.redhat.com/show_bug.cgi?id=1084477

in short: libvirt does not handle qos
correctly prior to version 0.10.2-33.el6

however, it is not (yet?) available in CentOS.
The latest available package seems to be:
libvirt-0.10.2-29.el6_5.7.x86_64

Please correct me if I'm wrong.
Is it just the versioning scheme that differs
between CentOS and upstream?

Or did the new rpm just not hit
the repo yet?

Thanks in advance!

PS: This is CentOS 6.5
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