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@redhat.com> 写道： 发件人: Eric Blake <eblake@redhat.com> 主题: Re: [libvirt-users] live migration 收件人: "hcyy" <caiyanyang@yahoo.com.cn> 抄送: libvirt-users@redhat.com 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@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org