本篇内容介绍了“KVM虚拟机怎么扩展磁盘空间”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
KVM支持在线扩展磁盘空间，支持RHEL系列6以上的版本
列出在线虚拟机磁盘
[root@e3 images]# virsh list --all Id 名称 状态 ---------------------------------------------------- 29 centos6.6 running 41 centos6.5 running - kvm001 关闭 - kvm002 关闭 - kvm003 关闭 - template 关闭 [root@e3 images]# virsh domblklist centos6.5 #列出在线虚拟机磁盘情况 目标 源 ------------------------------------------------ vda /data/kvm/images/centos6.5.qcow2 [root@e3 images]#创建一块qcow2磁盘并在线添加
[root@e3 images]# qemu-img create -f qcow2 centos6.5-add.qcow2 5G #创建一块5G大小的硬盘 Formatting 'centos6.5-add.qcow2', fmt=qcow2 size=5368709120 encryption=off cluster_size=65536 lazy_refcounts=off [root@e3 images]# ll centos6.5-add.qcow2 -rw-r--r--. 1 root root 197120 1月 21 18:31 centos6.5-add.qcow2 #在线添加磁盘 [root@e3 images]# virsh attach-disk centos6.5 /data/kvm/images/centos6.5-add.qcow2 vdb --cache=none --subdriver=qcow2 ## 成功附加磁盘查看
[root@e3 images]# virsh domblklist centos6.5 目标 源 ------------------------------------------------ vda /data/kvm/images/centos6.5.qcow2 vdb /data/kvm/images/centos6.5-add.qcow2 #添加成功 #切换虚拟机里查看 [root@kvm003 ~]# fdisk -l Disk /dev/vda: 32.2 GB, 32212254720 bytes 16 heads, 63 sectors/track, 62415 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000903e2 Device Boot Start End Blocks Id System /dev/vda1 * 3 1018 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/vda2 1018 41611 20458496 8e Linux LVM Partition 2 does not end on cylinder boundary. Disk /dev/mapper/VolGroup-lv_root: 19.9 GB, 19906166784 bytes 255 heads, 63 sectors/track, 2420 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 1040 MB, 1040187392 bytes 255 heads, 63 sectors/track, 126 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/vdb: 5368 MB, 5368709120 bytes #添加的 16 heads, 63 sectors/track, 10402 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000郑重声明：本文版权归原作者所有，转载文章仅为传播更多信息之目的，如作者信息标记有误，请第一时间联系我们修改或删除，多谢。
