KVM虛擬機添加硬盤

新增硬盤(關閉虛擬機)

1. 宿主機添加一塊硬盤

[root@mrxy-py kvmdisk]# qemu-img create -f raw /data1/kvmdisk/WMS-test-2-2.img 50G Formatting '/data1/kvmdisk/WMS-test-2-2.img', fmt=raw size=53687091200

2. 添加新磁盤信息加入配置文件

#關閉電源 [root@mrxy-py kvmdisk]# virsh destroy WMS-test-2 Domain WMS-test-2 destroyed #配置文件添加信息 [root@mrxy-py kvmdisk]# virsh edit WMS-test-2 <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/data1/kvmdisk/WMS-test-2-2.img'/> <target dev='vdb' bus='ide'/> </disk>

3.啓動虛擬機並配置硬盤

[root@mrxy-py kvmdisk]# virsh start WMS-test-2 Domain WMS-test-2 started fdisk /dev/sdb mkfs.ext4 /dev/sdb mount /dev/vdb /data vi /etc/fstab

獲得到/dev/sdb這個分區的UUID使用命令:blkid /dev/sdb Cat << EOF >> /etc/fstab UUID="f7dbec85-ec1e-4291-bf91-73587dc81855"/data ext4 defaults 0 0 EOF

擴容硬盤

#查看硬盤信息 [root@mrxy-py kvmdisk]# qemu-img info /data1/kvmdisk/WMS-test-3.img image: /data1/kvmdisk/WMS-test-3.img file format: raw virtual size: 50G (53695545344 bytes) disk size: 50G #增長硬盤信息 [root@mrxy-py kvmdisk]# qemu-img resize /data1/kvmdisk/WMS-test-3.img +50G Image resized. #查看增長後硬盤信息 [root@mrxy-py kvmdisk]# qemu-img info /data1/kvmdisk/WMS-test-3.img image: /data1/kvmdisk/WMS-test-3.img file format: raw virtual size: 100G (107382636544 bytes) disk size: 50G