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Gilberto Nunes

2009-Nov-30 15:53 UTC

[CentOS-virt] Live migration and DRBD

Hi folks

I deploy a two Dell PowerEdge T300 to test Virtualization with
kvm+drbd+heartbaet.

The KVM drbd and heartbeat work properly.

However, I have doubt!!

When the primary node has down, the secondary node start the VM that
has original running on primary node...
So, this required a full stop of hole system...
This is not we wish here...

Is there something way to live migrate VM from primary node that was
shutdown????

I have no idea how to make this stuff working...

Thanks for any help

-- 
Gilberto Nunes

Ben M.

2009-Nov-30 16:26 UTC

head link

[CentOS-virt] xendomains not autostarting

I have been scratching my head on this for days. Xendomains services 
just doesn't want to start at boot it seems, so I don't get my 
auto-domU's up without "service xendomains start" and the all
start.

chkconfig looks correct, I have checked xm dmesg, dmesg, turned off 
selinux and the only "clue" I have is that the xend.log startup looks 
different than a fairly similar machine and I don't quite understand 
what it might be saying. Is dom0 crashing and restarting at machine bootup?

I have only one domU in ../auto to keep this simpler, its name is 
"v22c54" and I have one other anomaly: smartd is also not starting on 
services boot up but apparently runs fine with a manual command.

=== xend.log boot up ==[2009-11-30 08:40:53 xend 3466] INFO (SrvDaemon:283) Xend
Daemon started

[2009-11-30 08:40:53 xend 3466] INFO (SrvDaemon:287) Xend changeset: 
unavailable.

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:228) XendDomainInfo.recreate({'paused': 0,
'cpu_time':
19493383087L, 'ssidref': 0, 'hvm': 0, 'shutdown_reason':
0, 'dying': 0,
'mem_kb': 1048576L, 'domid': 0, 'max_vcpu_id': 3,
'crashed': 0,
'running': 1, 'maxmem_kb': 17179869180L, 'shutdown': 0,
'online_vcpus':
4, 'handle': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 
'blocked': 0})

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] INFO (XendDomainInfo:240) 
Recreating domain 0, UUID 00000000-0000-0000-0000-000000000000.

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] WARNING 
(XendDomainInfo:262) No vm path in store for existing domain 0

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:992) Storing VM details: {'shadow_memory': '0',
'uuid':
'00000000-0000-0000-0000-000000000000', 'on_reboot':
'restart',
'on_poweroff': 'destroy', 'name': 'Domain-0',
'xend/restart_count': '0',
'vcpus': '4', 'vcpu_avail': '15',
'memory': '1024', 'on_crash':
'restart', 'maxmem': '1024'}

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1027) Storing domain details: {'cpu/1/availability': 
'online', 'cpu/3/availability': 'online',
'name': 'Domain-0',
'console/limit': '4194304', 'cpu/2/availability':
'online', 'vm':
'/vm/00000000-0000-0000-0000-000000000000', 'domid':
'0',
'cpu/0/availability': 'online', 'memory/target':
'1048576'}

[2009-11-30 08:40:53 xend 3466] DEBUG (XendDomain:163) number of vcpus 
to use is 2

[2009-11-30 08:40:53 xend 3466] INFO (SrvServer:116) unix 
path=/var/lib/xend/xend-socket

[2009-11-30 08:40:53 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1249) XendDomainInfo.handleShutdownWatch

== after manual xendomains start =
[root at localhost ~]# service xendomains start
Restoring Xen domains: v22c54.
Starting auto Xen domains: v22c54(skip)[done]              [  OK  ]

~~ xend.log cont'd from above point ~~

[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:287) XendDomainInfo.restore(['domain', ['domid',
'3'],
['uuid', 'a3199faf-edb4-42e5-bea1-01f2df77a47f'],
['vcpus', '1'],
['vcpu_avail', '1'], ['cpu_cap', '0'],
['cpu_weight', '256.0'],
['memory', '512'], ['shadow_memory', '0'],
['maxmem', '512'],
['bootloader', '/usr/bin/pygrub'], ['features'],
['name', 'v22c54'],
['on_poweroff', 'destroy'], ['on_reboot',
'restart'], ['on_crash',
'restart'], ['image', ['linux', ['ramdisk', 
'/var/lib/xen/boot_ramdisk.yFE7zn'], ['kernel', 
'/var/lib/xen/boot_kernel.bnNF6O'], ['args', 'ro 
root=/dev/vgcentos00/root']]], ['cpus', []], ['device',
['vif',
['backend', '0'], ['script', 'vif-bridge'],
['bridge', 'xenbr1'],
['mac', '00:16:36:41:76:ae']]], ['device',
['tap', ['backend', '0'],
['dev', 'xvda:disk'], ['uname', 
'tap:aio:/var/lib/xen/images/vms/v22c54'], ['mode',
'w']]], ['device',
['vkbd', ['backend', '0']]], ['device',
['vfb', ['backend', '0'],
['type', 'vnc'], ['vncunused', '1'],
['xauthority',
'/root/.Xauthority'], ['keymap', 'en-us']]],
['state', '-b----'],
['shutdown_reason', 'poweroff'], ['cpu_time',
'0.008262668'],
['online_vcpus', '1'], ['up_time',
'305.694555044'], ['start_time',
'1259414461.79'], ['store_mfn', '1875035'],
['console_mfn', '2193022']])
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:328) parseConfig: config is ['domain', ['domid',
'3'],
['uuid', 'a3199faf-edb4-42e5-bea1-01f2df77a47f'],
['vcpus', '1'],
['vcpu_avail', '1'], ['cpu_cap', '0'],
['cpu_weight', '256.0'],
['memory', '512'], ['shadow_memory', '0'],
['maxmem', '512'],
['bootloader', '/usr/bin/pygrub'], ['features'],
['name', 'v22c54'],
['on_poweroff', 'destroy'], ['on_reboot',
'restart'], ['on_crash',
'restart'], ['image', ['linux', ['ramdisk', 
'/var/lib/xen/boot_ramdisk.yFE7zn'], ['kernel', 
'/var/lib/xen/boot_kernel.bnNF6O'], ['args', 'ro 
root=/dev/vgcentos00/root']]], ['cpus', []], ['device',
['vif',
['backend', '0'], ['script', 'vif-bridge'],
['bridge', 'xenbr1'],
['mac', '00:16:36:41:76:ae']]], ['device',
['tap', ['backend', '0'],
['dev', 'xvda:disk'], ['uname', 
'tap:aio:/var/lib/xen/images/vms/v22c54'], ['mode',
'w']]], ['device',
['vkbd', ['backend', '0']]], ['device',
['vfb', ['backend', '0'],
['type', 'vnc'], ['vncunused', '1'],
['xauthority',
'/root/.Xauthority'], ['keymap', 'en-us']]],
['state', '-b----'],
['shutdown_reason', 'poweroff'], ['cpu_time',
'0.008262668'],
['online_vcpus', '1'], ['up_time',
'305.694555044'], ['start_time',
'1259414461.79'], ['store_mfn', '1875035'],
['console_mfn', '2193022']]
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:445) parseConfig: result is {'features': None,
'image':
['linux', ['ramdisk',
'/var/lib/xen/boot_ramdisk.yFE7zn'], ['kernel',
'/var/lib/xen/boot_kernel.bnNF6O'], ['args', 'ro 
root=/dev/vgcentos00/root']], 'cpus': [], 'vcpu_avail': 1,
'backend':
[], 'uuid': 'a3199faf-edb4-42e5-bea1-01f2df77a47f',
'on_reboot':
'restart', 'cpu_weight': 256.0, 'memory': 512,
'cpu_cap': 0,
'localtime': None, 'timer_mode': None, 'start_time':
1259414461.79,
'on_poweroff': 'destroy', 'on_crash': 'restart',
'device': [('vif',
['vif', ['backend', '0'], ['script',
'vif-bridge'], ['bridge',
'xenbr1'], ['mac', '00:16:36:41:76:ae']]),
('tap', ['tap', ['backend',
'0'], ['dev', 'xvda:disk'], ['uname', 
'tap:aio:/var/lib/xen/images/vms/v22c54'], ['mode',
'w']]), ('vkbd',
['vkbd', ['backend', '0']]), ('vfb',
['vfb', ['backend', '0'], ['type',
'vnc'], ['vncunused', '1'], ['xauthority',
'/root/.Xauthority'],
['keymap', 'en-us']])], 'bootloader':
'/usr/bin/pygrub', 'maxmem': 512,
'shadow_memory': 0, 'name': 'v22c54',
'bootloader_args': None, 'vcpus':
1, 'cpu': None}
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1774) XendDomainInfo.construct: None
[2009-11-30 11:17:15 xend 3466] DEBUG (balloon:145) Balloon: 7021072 KiB 
free; need 4096; done.
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:992) Storing VM details: {'shadow_memory': '0',
'uuid':
'a3199faf-edb4-42e5-bea1-01f2df77a47f', 'on_crash':
'restart',
'on_reboot': 'restart', 'start_time':
'1259414461.79', 'on_poweroff':
'destroy', 'name': 'v22c54',
'xend/restart_count': '0', 'vcpus': '1',
'vcpu_avail': '1', 'memory': '512',
'bootloader': '/usr/bin/pygrub',
'image': "(linux (ramdisk /var/lib/xen/boot_ramdisk.yFE7zn) (kernel
/var/lib/xen/boot_kernel.bnNF6O) (args 'ro 
root=/dev/vgcentos00/root'))", 'maxmem': '512'}
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:114) DevController: 
writing {'state': '1', 'backend-id': '0',
'backend':
'/local/domain/0/backend/vkbd/1/0'} to /local/domain/1/device/vkbd/0.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:116) DevController: 
writing {'frontend-id': '1', 'domain': 'v22c54',
'frontend':
'/local/domain/1/device/vkbd/0', 'state': '1',
'online': '1'} to
/local/domain/0/backend/vkbd/1/0.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:114) DevController: 
writing {'backend-id': '0', 'mac':
'00:16:36:41:76:ae', 'handle': '0',
'state': '1', 'backend':
'/local/domain/0/backend/vif/1/0'} to
/local/domain/1/device/vif/0.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:116) DevController: 
writing {'bridge': 'xenbr1', 'domain': 'v22c54',
'handle': '0',
'script': '/etc/xen/scripts/vif-bridge', 'state':
'1', 'frontend':
'/local/domain/1/device/vif/0', 'mac':
'00:16:36:41:76:ae', 'online':
'1', 'frontend-id': '1'} to
/local/domain/0/backend/vif/1/0.
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:633) Checking for duplicate for uname: 
/var/lib/xen/images/vms/v22c54 [tap:aio:/var/lib/xen/images/vms/v22c54], 
dev: xvda:disk, mode: w
[2009-11-30 11:17:15 xend 3466] DEBUG (blkif:27) exception looking up 
device number for xvda:disk: [Errno 2] No such file or directory: 
'/dev/xvda:disk'
[2009-11-30 11:17:15 xend 3466] DEBUG (blkif:27) exception looking up 
device number for xvda: [Errno 2] No such file or directory: '/dev/xvda'
[2009-11-30 11:17:15 xend 3466] DEBUG (blkif:27) exception looking up 
device number for xvda: [Errno 2] No such file or directory: '/dev/xvda'
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:114) DevController: 
writing {'backend-id': '0', 'virtual-device':
'51712', 'device-type':
'disk', 'state': '1', 'backend':
'/local/domain/0/backend/tap/1/51712'}
to /local/domain/1/device/vbd/51712.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:116) DevController: 
writing {'domain': 'v22c54', 'frontend': 
'/local/domain/1/device/vbd/51712', 'format': 'raw',
'dev': 'xvda',
'state': '1', 'params':
'aio:/var/lib/xen/images/vms/v22c54', 'mode':
'w', 'online': '1', 'frontend-id': '1',
'type': 'tap'} to
/local/domain/0/backend/tap/1/51712.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:114) DevController: 
writing {'state': '1', 'backend-id': '0',
'backend':
'/local/domain/0/backend/vfb/1/0'} to /local/domain/1/device/vfb/0.
[2009-11-30 11:17:15 xend 3466] DEBUG (DevController:116) DevController: 
writing {'vncunused': '1', 'domain': 'v22c54',
'frontend':
'/local/domain/1/device/vfb/0', 'xauthority':
'/root/.Xauthority',
'state': '1', 'keymap': 'en-us',
'online': '1', 'frontend-id': '1',
'type': 'vnc'} to /local/domain/0/backend/vfb/1/0.
[2009-11-30 11:17:15 xend 3466] DEBUG (vfbif:70) No VNC passwd 
configured for vfb access
[2009-11-30 11:17:15 xend 3466] DEBUG (vfbif:11) Spawn: 
['/usr/lib64/xen/bin/qemu-dm', '-M', 'xenpv',
'-d', '1', '-domain-name',
'v22c54', '-vnc', '127.0.0.1:0', '-vncunused',
'-k', 'en-us']
[2009-11-30 11:17:15 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1027) Storing domain details: {'console/port':
'2',
'name': 'v22c54', 'console/limit': '4194304',
'vm':
'/vm/a3199faf-edb4-42e5-bea1-01f2df77a47f', 'domid':
'1',
'cpu/0/availability': 'online', 'memory/target':
'524288', 'store/port':
'1'}
[2009-11-30 11:17:15 xend 3466] DEBUG (XendCheckpoint:200) 
restore:shadow=0x0, _static_max=0x200, _static_min=0x200,
[2009-11-30 11:17:15 xend 3466] DEBUG (balloon:145) Balloon: 7021064 KiB 
free; need 524288; done.
[2009-11-30 11:17:15 xend 3466] DEBUG (XendCheckpoint:217) [xc_restore]: 
/usr/lib64/xen/bin/xc_restore 20 1 1 2 0 0 0
[2009-11-30 11:17:15 xend 3466] INFO (XendCheckpoint:353) 
xc_domain_restore start: p2m_size = 20800
[2009-11-30 11:17:15 xend 3466] INFO (XendCheckpoint:353) Reloading 
memory pages:   0%
[2009-11-30 11:17:21 xend 3466] INFO (XendCheckpoint:353) Received all 
pages (0 races)
[2009-11-30 11:17:21 xend 3466] INFO (XendCheckpoint:3100%
[2009-11-30 11:17:21 xend 3466] INFO (XendCheckpoint:353) Memory 
reloaded (35912 pages)
[2009-11-30 11:17:21 xend 3466] INFO (XendCheckpoint:353) Domain ready 
to be built.
[2009-11-30 11:17:21 xend 3466] DEBUG (XendCheckpoint:324) store-mfn 1842329
[2009-11-30 11:17:21 xend 3466] DEBUG (XendCheckpoint:324) console-mfn 
2117145
[2009-11-30 11:17:21 xend 3466] INFO (XendCheckpoint:353) Restore exit 
with rc=0
[2009-11-30 11:17:21 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:927) XendDomainInfo.completeRestore
[2009-11-30 11:17:21 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1027) Storing domain details: {'console/ring-ref': 
'2117145', 'console/port': '2', 'name':
'v22c54', 'console/limit':
'4194304', 'vm':
'/vm/a3199faf-edb4-42e5-bea1-01f2df77a47f', 'domid':
'1', 'cpu/0/availability': 'online',
'memory/target': '524288',
'store/ring-ref': '1842329', 'store/port': '1'}
[2009-11-30 11:17:21 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:943) XendDomainInfo.completeRestore done
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices vif.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:164) Waiting for 0.
[2009-11-30 11:17:21 xend.XendDomainInfo 3466] DEBUG 
(XendDomainInfo:1249) XendDomainInfo.handleShutdownWatch
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:509) 
hotplugStatusCallback /local/domain/0/backend/vif/1/0/hotplug-status.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:523) 
hotplugStatusCallback 1.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices usb.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices vbd.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices irq.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices vkbd.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:164) Waiting for 0.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:509) 
hotplugStatusCallback /local/domain/0/backend/vkbd/1/0/hotplug-status.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:523) 
hotplugStatusCallback 1.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices vfb.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:164) Waiting for 0.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:509) 
hotplugStatusCallback /local/domain/0/backend/vfb/1/0/hotplug-status.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:523) 
hotplugStatusCallback 1.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices pci.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices ioports.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices tap.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:164) Waiting for 51712.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:509) 
hotplugStatusCallback /local/domain/0/backend/tap/1/51712/hotplug-status.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:523) 
hotplugStatusCallback 1.
[2009-11-30 11:17:21 xend 3466] DEBUG (DevController:158) Waiting for 
devices vtpm.

Tait Clarridge

2009-Nov-30 16:43 UTC

head link

[CentOS-virt] Live migration and DRBD

On Mon, 2009-11-30 at 13:53 -0200, Gilberto Nunes wrote:> Hi folks
> 
> I deploy a two Dell PowerEdge T300 to test Virtualization with
> kvm+drbd+heartbaet.
> 
> The KVM drbd and heartbeat work properly.
> 
> However, I have doubt!!
> 
> When the primary node has down, the secondary node start the VM that
> has original running on primary node...
> So, this required a full stop of hole system...
> This is not we wish here...
> 
> Is there something way to live migrate VM from primary node that was
> shutdown????
> 
> I have no idea how to make this stuff working...
> 
> Thanks for any help
> Currently there is work being done on a project for Xen called Remus. I
am not sure about KVM but Remus is still in development and although it
has been merged into the xen-unstable repository, it isn't completely
ready yet (although the developers are working very hard).

Basically it performs the first part of a live migration and if
connection is lost, it will jump the virtual machine over to the
secondary host.

http://nss.cs.ubc.ca/remus/


It appears that Red Hat is including "high availability" for KVM in
their Red Hat Enterprise Virtualization Manager for Servers.

Not sure if this is going to make it to CentOS, can someone
confirm/deny?
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Kai Schaetzl

2009-Nov-30 18:31 UTC

head link

[CentOS-virt] xendomains not autostarting

Ben M. wrote on Mon, 30 Nov 2009 11:26:17 -0500:
> I have been scratching my head
With or without scratching, please do not hit reply when you want to send 
a *new* message to the list! Use "new message"!
Thanks,

Kai

Ben M.

2009-Nov-30 19:24 UTC

head link

[CentOS-virt] xendomains not autostarting

My apologies, I thought that clearing the subject line and body of all 
data would do that.

All other lists I have been on the past 25 years perform that way just 
fine. I will check the FAQ.

Kai Schaetzl wrote:
  > With or without scratching, please do not hit reply when you want to 
send> a *new* message to the list! Use "new message"!
> Thanks,
> 
> Kai
> 
> 
> 
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt
>

Kris Buytaert

2009-Dec-01 11:53 UTC

head link

[CentOS-virt] Live migration and DRBD

On Mon, 2009-11-30 at 11:43 -0500, Tait Clarridge wrote:> On Mon, 2009-11-30 at 13:53 -0200, Gilberto Nunes wrote:
> > Hi folks
> > 
> > I deploy a two Dell PowerEdge T300 to test Virtualization with
> > kvm+drbd+heartbaet.
> > 
> > The KVM drbd and heartbeat work properly.
> > 
> > However, I have doubt!!
> > 
> > When the primary node has down, the secondary node start the VM that
> > has original running on primary node...
> > So, this required a full stop of hole system...
> > This is not we wish here...
> > 
> > Is there something way to live migrate VM from primary node that was
> > shutdown????
> > 
> > I have no idea how to make this stuff working...
> > 
> > Thanks for any help
> > 
> Currently there is work being done on a project for Xen called Remus. I
> am not sure about KVM but Remus is still in development and although it
> has been merged into the xen-unstable repository, it isn't completely
> ready yet (although the developers are working very hard).
> 
> Basically it performs the first part of a live migration and if
> connection is lost, it will jump the virtual machine over to the
> secondary host.
> 
> http://nss.cs.ubc.ca/remus/
> 
> 
> It appears that Red Hat is including "high availability" for KVM
in
> their Red Hat Enterprise Virtualization Manager for Servers.
> 
> Not sure if this is going to make it to CentOS, can someone
> confirm/deny?
There are 3 different things being discussed in this thread so far :

 1. Live Migration 
 2. Virtual Machine HA 
 3. Continuous Mirroring / Replication 

(1) First of all Live Migration  is not a HA solution,  if your primary
machine dies , there is no way to initiate a Live Migration anymore, as
Live  migration requires the home node to be still active,  it can be
used to migrate workloads away during maintenance slots etc , or to
spread load, but not for HA.

(2) So what people typically configure with HeartBeat is indeed the
restart of a virtual machine from the same "shared" storage device. 

(3) Remus and Kemari are new kids in town they are going for RealTime
Mirroring and therefore will implement real Virtual Machine HA.
Remus is headed for Xen inclusion, while Kemari has just announced that
they are also starting to work on a KVM port , but their current version
was only Xen targeted.

http://virtualization.com/guest-posts/2009/11/15/remus-and-kemari-still-going-strong/

Hope that clarifies some stuff ..

> ______________________________________
> _________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt

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[CentOS-virt] Live migration and DRBD

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[CentOS-virt] Live migration and DRBD

[CentOS-virt] xendomains not autostarting

[CentOS-virt] xendomains not autostarting

[CentOS-virt] Live migration and DRBD

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