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Sysadmin/Migrate virtual machine (view source)

Revision as of 01:06, 23 January 2011

54 bytes removed ,  01:06, 23 January 2011
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* First, create the logical volume and attach it to the running VM:
 
* First, create the logical volume and attach it to the running VM:
   −
  treehouse# scp lightwave:/boot/{vmlinuz,initrd}-2.6.31-22-server /srv/vm/kernel/ubuntu/
+
  treehouse# scp VMNAME:/boot/{vmlinuz,initrd}-2.6.31-22-server /srv/vm/kernel/ubuntu/
−
  treehouse# virsh vol-create-as treehouse lightwave-root 10G
+
  treehouse# virsh vol-create-as treehouse VMNAME-root 10G
−
  treehouse# virsh attach-disk lightwave /dev/treehouse/lightwave-root vdc
+
  treehouse# virsh attach-disk VMNAME /dev/treehouse/VMNAME-root vdc
−
  treehouse# virsh console lightwave
+
  treehouse# virsh console VMNAME
    
* From within the VM, format the new volume and move things over
 
* From within the VM, format the new volume and move things over
   −
  lightwave# mkfs.ext4 -L lightwave-root -O flex_bg,extent,uninit_bg,sparse_super /dev/vdc
+
  VMNAME# mkfs.ext4 -L VMNAME-root -O flex_bg,extent,uninit_bg,sparse_super /dev/vdc
−
  lightwave# tune2fs -c -1 -i 0 /dev/vdc
+
  VMNAME# tune2fs -c -1 -i 0 /dev/vdc
−
  lightwave# mount /dev/vdc /mnt
+
  VMNAME# mount /dev/vdc /mnt
−
  lightwave# rsync -PHAXphax --numeric-ids --delete / /mnt/
+
  VMNAME# rsync -PHAXphax --numeric-ids --delete / /mnt/
−
  lightwave# vim /mnt/etc/fstab
+
  VMNAME# vim /mnt/etc/fstab
−
  lightwafe# umount /mnt
+
  VMNAME# umount /mnt
−
  lightwave# ^D
+
  VMNAME# ^D
    
* Then edit the VM configuration to make it boot without GRUB, using externally provided kernel and initrd:
 
* Then edit the VM configuration to make it boot without GRUB, using externally provided kernel and initrd:
   −
  treehouse# virsh edit lightwave
+
  treehouse# virsh edit VMNAME
    
   <os>
 
   <os>
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     <kernel>/srv/vm/kernel/ubuntu/vmlinuz-2.6.31-22-server</kernel>
 
     <kernel>/srv/vm/kernel/ubuntu/vmlinuz-2.6.31-22-server</kernel>
 
     <initrd>/srv/vm/kernel/ubuntu/initrd.img-2.6.31-22-server</initrd>
 
     <initrd>/srv/vm/kernel/ubuntu/initrd.img-2.6.31-22-server</initrd>
−
     <cmdline>console=tty0 console=ttyS0,115200n8 vga=normal root=LABEL=lightwave-root ro</cmdline>
+
     <cmdline>console=tty0 console=ttyS0,115200n8 vga=normal root=LABEL=VMNAME-root ro</cmdline>
 
     <boot dev='hd'/>
 
     <boot dev='hd'/>
 
   </os>
 
   </os>
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     ...
 
     ...
 
     <disk type='block' device='disk'>
 
     <disk type='block' device='disk'>
−
       <source dev='/dev/treehouse/lightwave-root'/>
+
       <source dev='/dev/treehouse/VMNAME-root'/>
 
       <target dev='vda' bus='virtio'/>
 
       <target dev='vda' bus='virtio'/>
 
     </disk>
 
     </disk>
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* Reboot
 
* Reboot
   −
  #treehouse virsh destroy lightwave
+
  #treehouse virsh destroy VMNAME
−
  #treehouse virsh start lightwave --console
+
  #treehouse virsh start VMNAME --console
    
=== How to migrate a file-based guest to LVM (offline method) ===
 
=== How to migrate a file-based guest to LVM (offline method) ===
Retrieved from "https://wiki.sugarlabs.org/go/Special:MobileDiff/60947"