kvm qcow 扩容
qemu-imge resize /data/data_root/vm-images/0_new_add1.img +250G virsh define /etc/libvirt/qemu/0_new.xml && virsh start 0_new umount /data2 e2fsck -f /dev/vdb resize2fs /dev/vdb mount -a
qemu-imge resize /data/data_root/vm-images/0_new_add1.img +250G virsh define /etc/libvirt/qemu/0_new.xml && virsh start 0_new umount /data2 e2fsck -f /dev/vdb resize2fs /dev/vdb mount -a