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KVM LVM动态增加虚拟机磁盘最佳实践 1. 虚拟机安装时使用主机的LVM分区1.1 主机创建lvm分区# lvcreate -L 10G -n lv_vm_img vg1.2 使用此分区创建虚拟机# 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. 为虚拟机增加新的磁盘空间2.1 主机创建lvm分区 # lvcreate -L 40G -n lv_vm_img1 vg2.2 添加此分区到虚拟机中# virsh attach-disk --domain vm_img1 --source /dev/mapper/vg-lv_vm_img1 --target vdb --persistent2.3 进入虚拟机扩展VG空间# 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 为虚拟机的特定应用创建lv# lvcreate -L 20G -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/
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