KVM虚拟机在线扩展磁盘空间 KVM虚拟机在线扩展磁盘空间

为什么80%的码农都做不了架构师？>>>
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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 ---------------------------------------------------- 29centos6.6running 41centos6.5running -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 -lDisk /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: 0x000903e2Device BootStartEndBlocksIdSystem /dev/vda1*3101851200083Linux Partition 1 does not end on cylinder boundary. /dev/vda2101841611204584968eLinux 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: 0x00000000Disk /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: 0x00000000Disk /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

【KVM虚拟机在线扩展磁盘空间】转载于:https://my.oschina.net/kcw/blog/370329