Best practices for dynamically adding virtual machine disks to KVM LVM

Kvm lvm dynamic addition of Virtual Machine disk best practices 1. when the VM is installed, use the LVM partition of the host 1.1 to create the lvm partition # lvcreate-L 10G-n lv_vm_img vg1.2 use this partition to create the VM # koan -- server = localhost -- port = "11180" -- virt -- system = "vm_img1" -- virt-path = "/dev/mapper/vg-lv_vm_img" -- virt-type = kvm -- qemu-disk-type = virtio -- qemu-net- type = virtio www.2cto.com 2. create an lvm partition for the VM to add new disk space 2.1 host # lvcreate-L 40G-n lv_vm_img1 vg2.2 add this partition to the VM # virsh attach-disk -- domain vm_img1 -- source/dev /mapper/vg-lv_vm_img1 -- target vdb -- persistent2.3 enter the VM to expand the VG space # virsh console vm_img1Connected to domain vm_img1Escape character is ^] CentOS release 6.3 (Final) kernel 2.6.32-279.2.1.el6.x86 _ 64 on an x86_64 www.2cto.com vm_img1 login: rootPassword: * *********** # pvcreate/dev/vdb # vgextend vg_vm_img1/dev/vdb # vgs 2.4 create lv # lvcreate-L 20 for specific applications of virtual machines g-n lv_www vg_vm_img1 # mkfs. ext4/dev/mapper/vg_vm_img1-lv_www # vi/etc/fstab/dev/mapper/vg_vm_img1-lv_www/var/www ext4 defaults 1 2 # mount/var/www # fixfiles restore/var/