[Fedora-xen] what steps are required to manually move a PV domU from one machine to another?
fc xen list
fcxen at itsbeen.sent.com
Sat Feb 2 21:38:50 UTC 2008
My bad, the clone army master was on eth0 and the clone army slaves were on
eth1 so when I copied the xml dump, I changed everything but that
<source bridge='eth1'/>
ugh, but please read below for problems with vanilla F8 and virt-clone.
Daniel P. Berrange wrote:
> On Sat, Feb 02, 2008 at 12:48:20PM -0800, fc xen list wrote:
>> Hi,
>>
>> I am having a problem - I created a lovely bunch of F8 x86_64 domUs and I
>> want to create a vast clone army of them using different dom0s. The problem
>> is, I do:
>>
>> fm # virt-install c1 (no graphics)
>> fm # xm start c1
>> fm # xm shutdown c1 [ ok I don't _always_ shut it down :P ]
>
> Welcome to the world of massive data corruption if you copy the
> disk without shutting down.
Yeah, I know, but they are pretty inactive and it has worked great in the past.
>
>> fm # scp -p c1.img othermachine:/var/lib/xen/images
>> then:
>> om1 # virsh define c1.xml
>
> You can't just use the same XML for each - you need to change the UUID,
> the namem, and disk image in the XML at very least.
Sorry, I do change that - id, name, image, MAC address, etc.
>
>> om1 # xm start c1
>>
>> and hangville,
>> if I do:
>> om1 # xmstart c1 -c
>> it seems to hang just after the grub boot menu.
>
> Define hang ? If the guest is configured with graphical framebuffer it
> is perfectly expected that you'll not see anything on the text console
> while booting.
I always choose no graphics on the virt-install
The xm list state is usually --p--
>
>> I assume I am "doing it wrong" but this worked great in the past.
>
> You might want to try the 'virt-clone' tool which will automate much of
> the stuff.
Thanks for mentioning that, I can't - my VMs always enter a "no state" state
when I shut them down and virt-clone won't clone them unless they are in a
different state that I can't seem to get them to go into.
One confusing thing is xm list and virsh use different terms. In xm list the
VM shows as state "------"
Example:
# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 5143 8 r----- 10708.0
c1 30 1200 1 -b---- 3294.3
c2 28 768 1 -b---- 349.4
c3 34 2465 1 ------ 0.0
# virsh list --all
Id Name State
----------------------------------
0 Domain-0 running
28 m66 blocked
30 m62 blocked
- m82 no state
I have never had a machine go to any other state, other than "------" (or "no
state" in virsh) after a xm shutdown*, should be using some other shutdown
method? All my builds are using vanilla F8 x86_64 and virt-install, no custom
kernels or other monkey business. A different dom0 with a centos51 and F8 domU
that I just did xm shutdown on, they both go to no state:
# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 2358 4 r----- 15402.7
d1 7 375 1 -b---- 466.3
c51 22 768 1 ------ 138.9
f8-2 21 512 1 ------ 57.3
[root at sc-t131 ~]# virsh list --all
Id Name State
----------------------------------
0 Domain-0 running
7 d1 blocked
- c51 no state
- f8-2 no state
Example of state during hanging after xm start attempt of c3:
# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 5143 8 r----- 10715.6
c1 30 1200 1 -b---- 3294.3
c2 28 768 1 -b---- 349.4
c3 35 2465 1 --p--- 0.0
# virsh list --all
Id Name State
----------------------------------
0 Domain-0 running
28 m66 blocked
30 m62 blocked
35 m82 paused
I'd love to use virt-clone...
>
> Dan.
* OK, one goes into "---s-d" but that is upgraded from a previous Fedora
version, so I don't worry about that one. All others are new virt-install
installs.
More information about the Fedora-xen
mailing list