kvm添加虚拟硬盘
1 创建新的虚拟硬盘# qemu-img create -f qcow2 /data/kvm/CentOs6.7_2.qcow2 2G
2 关闭虚拟机
# virsh shutdown CentOs6.7
3 编辑配置文件，注意source file和source file
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/data/kvm/CentOs6.7.qcow2'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/data/kvm/CentOs6.7_2.qcow2'/>
<source file='vdb' bus='virtio'/>
# 此行删去，会自动生成
# <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</disk>
4 启动虚拟机
# virsh start CentOs6.7 --console
5 分区、格式化、挂载即可使用
# mkfs.ext4 /dev/vdb
# mount /dev/vdb /mnt/
6 此处也可以将新的虚拟磁盘加入root的lvm中，此处不详述
# pvcreate /dev/vdb
# vgextend VolGroup /dev/vdb
# lvextend -l +100%FREE /dev/VolGroup/lv_root
# resize2fs -p /dev/VolGroup/lv_root
# df -h
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