CentOS virt - Dec 2013 - CentOS-virt Digest, Vol 76, Issue 3

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Verzonden: ?6-?12-?2013 09:35
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Onderwerp: CentOS-virt Digest, Vol 76, Issue 3

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Today's Topics:

   1. Re: What do you use to provision domU's? (Johnny Hughes)
   2. Re: What do you use to provision domU's? (Johnny Hughes)
   3. Re: What do you use to provision domU's? (Dusty Mabe)
   4. Re: What do you use to provision domU's? (Johnny Hughes)
   5. Re: What do you use to provision domU's? (Kenneth Porter)


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Message: 1
Date: Tue, 03 Dec 2013 17:31:38 -0600
From: Johnny Hughes <johnny at centos.org>
Subject: Re: [CentOS-virt] What do you use to provision domU's?
To: centos-virt at centos.org
Message-ID: <529E69DA.4030709 at centos.org>
Content-Type: text/plain; charset="iso-8859-1"

On 12/02/2013 12:32 AM, Kenneth Porter wrote:
> The subject says it all. I got CentOS 6.4 installed and then converted it
> to boot into the Xen kernel, using the C6.4 system as its dom0. But now
I'm
> uncertain how to put a C6.4 domU on the result. Which tools are
recommended?
You can use virt-manager either from the Dom0 server (if it has all the
GUI stuff and virt-manger installed) ... OR ... by connecting to the
Dom0 using virt-manager from a Linux workstation.  See my xen4centos
libvirt article here:

http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt

You can also use Xen XM tools with the default install ... OR ... if you
do not plan on using libvirt at all, you can setup and use Xen XL tools
(if using libvirt, you have to use xend and Xen XM):

XM Tools:
http://wiki.xen.org/wiki/XM

XL Tools:
http://wiki.xen.org/wiki/XL

Thanks,
Johnny Hughes

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Message: 2
Date: Tue, 03 Dec 2013 17:35:16 -0600
From: Johnny Hughes <johnny at centos.org>
Subject: Re: [CentOS-virt] What do you use to provision domU's?
To: centos-virt at centos.org
Message-ID: <529E6AB4.3050002 at centos.org>
Content-Type: text/plain; charset="iso-8859-1"

On 12/03/2013 05:32 AM, Nico Kadel-Garcia wrote:
> On Mon, Dec 2, 2013 at 1:11 PM, Karanbir Singh <mail-lists at
karan.org> wrote:
>> On 12/02/2013 06:32 AM, Kenneth Porter wrote:
>>> The subject says it all. I got CentOS 6.4 installed and then
converted it
>>> to boot into the Xen kernel, using the C6.4 system as its dom0. But
now I'm
>>> uncertain how to put a C6.4 domU on the result. Which tools are
recommended?
>> why not just use virt-install from the cli ?
>>
>> - KB
> Morning, Karanbir, long time since I've commented on a thread with you.
>
> Because virt-install involves having some fairly serious knowledge of
> the options available. For a noob, or someone who doesn't write their
> own resource analysis and wrapper scripts easily, It's fairly fragile
> to use. It also doesn't automatically report replicatoin of IP
> addresses for setup configurations, nor is it capable of tracking
> resource allocations and overlaps among multiple KVM servers that are
> not in a cluster.
>
> virt-manager is very helpful to noobs setting up their first
> resources, but I frankly admit that for small virtualization
> environments. But it's quite burdened by trying to support too many
> virtualization technologies, and by its own confusion of who owns the
> configuration files and where they should reside.  But I also admit
> that for small, lightweight virtualization setups, I find KVM itself
> quite awkeward and simply use VirtualBox. The KVM bridging
> requirements, in particular, are impossible to set up without
> hand-editing the network configuration files or reading, and writing,
> guidelines such as my old ones for pair bonding and bridging and KVM
> and VLANs at
https://wikis.uit.tufts.edu/confluence/display/TUSKpub/Configure+Pair+Bonding,+VLANs,+and+Bridges+for+KVM+Hypervisor.
>

Heaven help me, but I agree with you :)

Libvirt and virt-manager is much easier to use than the command line
tools ... although it also limits what you can accomplish as it only
does a fraction of the possible configurations.

Libvirt on xen4centos:

http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt

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Message: 3
Date: Tue, 3 Dec 2013 18:41:27 -0500
From: Dusty Mabe <dustymabe at gmail.com>
Subject: Re: [CentOS-virt] What do you use to provision domU's?
To: Discussion about the virtualization on CentOS
        <centos-virt at centos.org>
Message-ID:
        <CAFfJ-R6rm9FuVG4_VjUM4wcqJS4w0+ekFRRfc2j5es+9rqNpoA at
mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

On Tue, Dec 3, 2013 at 6:31 PM, Johnny Hughes <johnny at centos.org>
wrote:
>
> You can also use Xen XM tools with the default install ... OR ... if you
> do not plan on using libvirt at all, you can setup and use Xen XL tools
> (if using libvirt, you have to use xend and Xen XM):
>
IIRC I have used libvirt with the libxl driver (no xend running) and
it seemed to work fine (although I was just learning and not really
using it in production). Is there a reason you say you have to use
xend rather than libxl with libvirt?

Dusty


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Message: 4
Date: Tue, 03 Dec 2013 17:56:17 -0600
From: Johnny Hughes <johnny at centos.org>
Subject: Re: [CentOS-virt] What do you use to provision domU's?
To: centos-virt at centos.org
Message-ID: <529E6FA1.8000304 at centos.org>
Content-Type: text/plain; charset="iso-8859-1"

On 12/03/2013 05:41 PM, Dusty Mabe wrote:
> On Tue, Dec 3, 2013 at 6:31 PM, Johnny Hughes <johnny at centos.org>
wrote:
>> You can also use Xen XM tools with the default install ... OR ... if
you
>> do not plan on using libvirt at all, you can setup and use Xen XL tools
>> (if using libvirt, you have to use xend and Xen XM):
>>
> IIRC I have used libvirt with the libxl driver (no xend running) and
> it seemed to work fine (although I was just learning and not really
> using it in production). Is there a reason you say you have to use
> xend rather than libxl with libvirt?
>
Yes, there are (or at least were in xen-4.2.2, kernel-3.4.x, and
libvirt-0.10.2.4 when we did extensive testing) some issues creating VMs
using xenlight (XL) with the xen4centos libvirt.

We have done many updates since then (much newer libvirt (0.10.2.8) and
also 4.2.3 xen and even a newer kernel (3.10.x)) ... so it XL might work
better now than it did initially.

I would be glad to hear reports from others who have tested XL with the
latest packages.

You can not swap xen types on a dom0 ... SO ... do not break you
production machines trying to go from XM to XL and vice-versa :)

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Message: 5
Date: Tue, 03 Dec 2013 22:24:38 -0800
From: Kenneth Porter <shiva at sewingwitch.com>
Subject: Re: [CentOS-virt] What do you use to provision domU's?
To: Discussion about the virtualization on CentOS
        <centos-virt at centos.org>
Message-ID: <BA8E29444B52F26B497BB5B6@[10.170.7.6]>
Content-Type: text/plain; charset=us-ascii; format=flowed

--On Tuesday, December 03, 2013 5:35 PM -0600 Johnny Hughes
<johnny at centos.org> wrote:
> Libvirt on xen4centos:
>
> http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt
I'm looking forward to the page on libvirt bridging mentioned there.




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