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Sysadmin/Migrate virtual machine (view source)
Revision as of 19:13, 14 January 2012
, 19:13, 14 January 2012no edit summary
=== How to migrate a file-based guest to LVM (online method) ===
=== How to migrate a file-based guest to LVM (online method) ===
* First, create the logical volume and attach it to the running VM:
* First, take a copy of the kernel and initrd:
treehouse# scp VMNAME:/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/
* Then, create the logical volume and attach it to the running VM:
treehouse# virsh vol-create-as treehouse VMNAME-root 10G
treehouse# virsh vol-create-as treehouse VMNAME-root 10G
treehouse# virsh attach-disk VMNAME /dev/treehouse/VMNAME-root vdc
treehouse# virsh attach-disk VMNAME /dev/treehouse/VMNAME-root vdc
=== How to migrate a file-based guest to LVM (offline method) ===
=== How to migrate a file-based guest to LVM (offline method) ===
This method works by taking down the virtual machine during the migration and mounting the
partition inside the hard drive image. Mounting qcow2 files require a fancier method.
* Determine the offset of the root partition within the raw disk image:
* Determine the offset of the root partition within the raw disk image: