Re: live migration

[hcyy <caiyanyang@xxxxxxxxxxxx>]

thank you!

could you show me a xml example for live migration?

I think maybe i have something wrong in it?

it is my xml :

<domain type='kvm'>

  <name>vm12</name>

  <uuid>7d620b81-ab66-a1df-9d36-38df867c3108</uuid>

  <memory>5000000</memory>

  <currentMemory>5000000</currentMemory>

  <vcpu>2</vcpu>

  <os>

    <type arch='x86_64' machine='pc-1.0'>hvm</type>

    <boot dev='hd'/>

  </os>

  <features>

    <acpi/>

    <apic/>

    <pae/>

  </features>

  <clock offset='utc'/>

  <on_poweroff>destroy</on_poweroff>

  <on_reboot>restart</on_reboot>

  <on_crash>restart</on_crash>

  <devices>

    <emulator>/usr/bin/kvm</emulator>

    <disk type='file' device='disk'>

      <driver name='qemu' type='qcow2'/>

      <source file='/share/vm12.img'/>

      <target dev='vda' bus='virtio'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>

    </disk>

    <interface type='bridge'>

      <mac address='52:54:00:20:ca:c1'/>

      <source bridge='br0'/>

      <model type='virtio'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>

    </interface>

    <serial type='pty'>

      <target port='0'/>

    </serial>

    <console type='pty'>

      <target type='serial' port='0'/>

    </console>

    <input type='mouse' bus='ps2'/>

    <graphics type='vnc' port='5912' autoport='no' keymap='en-us'/>

    <sound model='ich6'>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>

    </sound>

    <video>

      <model type='cirrus' vram='9216' heads='1'/>

     <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>

    </video>

    <memballoon model='virtio'>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>

    </memballoon>

  </devices>

</domain>

           

--- 12年7月10日，周二, Eric Blake <eblake@xxxxxxxxxx> 写道：

发件人: Eric Blake <eblake@xxxxxxxxxx>
主题: Re: live migration
收件人: "hcyy" <caiyanyang@xxxxxxxxxxxx>
抄送: libvirt-users@xxxxxxxxxx
日期: 2012年7月10日,周二,下午9:19

On 07/10/2012 06:46 AM, hcyy wrote:
> Hello, everybody.     I use NFS to do live migration。After input  virsh
> --connect=qemu:///system --quiet migrate --live vm12 qemu+tcp://pcmk-1/system  (vm12  is vm name,/pcmk-1 is host name)it use almost 10s for preparation. During the 10s,the vm is still runing and can ping other vm. But if i input mkdir pcmk-6 in vm during the 10s,it say :mkdir: cannot create directory `pcmk-6': Read-only file system.     Anybody can tell me this situation is due to my wrong configure or libvirt cannot mkdir during migration？thanks!

The act of migration should not be guest-visible, so if you are seeing a
read-only directory from within your guest, it is most likely some other
issue and not migration itself that caused the problem.

--
Eric Blake   eblake@xxxxxxxxxx    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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