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本篇內(nèi)容介紹了“KVM虛擬機(jī)怎么擴(kuò)展磁盤空間”的有關(guān)知識(shí),在實(shí)際案例的操作過(guò)程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
KVM支持在線擴(kuò)展磁盤空間,支持RHEL系列6以上的版本
列出在線虛擬機(jī)磁盤
[root@e3 images]# virsh list --all Id 名稱 狀態(tài) ---------------------------------------------------- 29 centos6.6 running 41 centos6.5 running - kvm001 關(guān)閉 - kvm002 關(guān)閉 - kvm003 關(guān)閉 - template 關(guān)閉 [root@e3 images]# virsh domblklist centos6.5 #列出在線虛擬機(jī)磁盤情況 目標(biāo) 源 ------------------------------------------------ vda /data/kvm/images/centos6.5.qcow2 [root@e3 images]#
創(chuàng)建一塊qcow2磁盤并在線添加
[root@e3 images]# qemu-img create -f qcow2 centos6.5-add.qcow2 5G #創(chuàng)建一塊5G大小的硬盤 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 #在線添加磁盤 [root@e3 images]# virsh attach-disk centos6.5 /data/kvm/images/centos6.5-add.qcow2 vdb --cache=none --subdriver=qcow2 ## 成功附加磁盤
查看
[root@e3 images]# virsh domblklist centos6.5 目標(biāo) 源 ------------------------------------------------ vda /data/kvm/images/centos6.5.qcow2 vdb /data/kvm/images/centos6.5-add.qcow2 #添加成功 #切換虛擬機(jī)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
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