KVM虚拟机添加磁盘
未添加硬盘之前,到虚拟机中查看 fdisk -l ,确定只有一块vda
[root@ehs-oracle-01 rules.d]# fdisk -l 磁盘 /dev/vda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000b337a 设备 Boot Start End Blocks Id System /dev/vda1 * 2048 2099199 1048576 83 Linux /dev/vda2 2099200 104857599 51379200 8e Linux LVM 磁盘 /dev/mapper/rhel-root:47.2 GB, 47240445952 字节,92266496 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/mapper/rhel-swap:5368 MB, 5368709120 字节,10485760 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 [root@ehs-oracle-01 rules.d]#
在宿主机上进行操作
[root@localhost images]# cd /var/lib/libvirt/images
创建新的虚拟磁盘:
[root@ehs-as-04 images]# qemu-img create -f qcow2 -o size=4G /var/lib/libvirt/images/ehs-rac-01-b.qcow2 Formatting '/var/lib/libvirt/images/ehs-rac-01-b.qcow2', fmt=qcow2 size=4294967296 encryption=off cluster_size=65536 lazy_refcounts=off [root@ehs-as-04 images]# qemu-img create -f qcow2 -o size=4G /var/lib/libvirt/images/ehs-rac-01-c.qcow2 Formatting '/var/lib/libvirt/images/ehs-rac-01-c.qcow2', fmt=qcow2 size=4294967296 encryption=off cluster_size=65536 lazy_refcounts=off [root@ehs-as-04 images]# qemu-img create -f qcow2 -o size=4G /var/lib/libvirt/images/ehs-rac-01-d.qcow2 Formatting '/var/lib/libvirt/images/ehs-rac-01-d.qcow2', fmt=qcow2 size=4294967296 encryption=off cluster_size=65536 lazy_refcounts=off [root@ehs-as-04 images]# qemu-img create -f qcow2 -o size=40G /var/lib/libvirt/images/ehs-rac-01-e.qcow2 Formatting '/var/lib/libvirt/images/ehs-rac-01-e.qcow2', fmt=qcow2 size=21474836480 encryption=off cluster_size=65536 lazy_refcounts=off [root@ehs-as-04 images]# qemu-img create -f qcow2 -o size=20G /var/lib/libvirt/images/ehs-rac-01-f.qcow2 Formatting '/var/lib/libvirt/images/ehs-rac-01-f.qcow2', fmt=qcow2 size=21474836480 encryption=off cluster_size=65536 lazy_refcounts=off [root@ehs-as-04 images]# ll 总用量 127525264 -rw------- 1 qemu qemu 21478375424 9月 9 17:47 ehs-jboss-01.qcow2 -rw------- 1 qemu qemu 4642897920 9月 9 17:47 ehs-jboss-02.qcow2 -rw------- 1 qemu qemu 3873898496 9月 9 17:46 ehs-mq-01.qcow2 -rw------- 1 qemu qemu 3718119424 9月 9 17:43 ehs-mq-02.qcow2 -rw-r--r-- 1 root root 197120 9月 6 16:20 ehs-oracle-01-a.img -rw-r--r-- 1 root root 197120 9月 6 16:21 ehs-oracle-01-b.img -rw-r--r-- 1 root root 197120 9月 6 16:21 ehs-oracle-01-c.img -rw-r--r-- 1 root root 197120 9月 6 16:21 ehs-oracle-01-d.img -rw-r--r-- 1 root root 197120 9月 6 16:21 ehs-oracle-01-e.img -rw------- 1 root root 53695545344 9月 9 15:42 ehs-oracle-01.qcow2 -rw------- 1 root root 3783524352 9月 9 15:42 ehs-oracle-02.qcow2 -rw-r--r-- 1 root root 197120 9月 9 17:46 ehs-rac-01-b.qcow2 -rw-r--r-- 1 root root 197120 9月 9 17:46 ehs-rac-01-c.qcow2 -rw-r--r-- 1 root root 197120 9月 9 17:46 ehs-rac-01-d.qcow2 -rw-r--r-- 1 root root 197120 9月 9 17:46 ehs-rac-01-e.qcow2 -rw-r--r-- 1 root root 197120 9月 9 17:46 ehs-rac-01-f.qcow2 -rw------- 1 qemu qemu 36369137664 9月 9 17:42 ehs-rac-01.qcow2 -rw------- 1 qemu qemu 4957863936 9月 9 17:47 ehs-rac-02.qcow2
添加虚拟磁盘到指定的虚拟机:
[root@ehs-as-04 images]# virsh attach-disk --domain ehs-rac-01 --source /var/lib/libvirt/images/ehs-rac-01-b.qcow2 --target sdb --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistent 成功附加磁盘 [root@ehs-as-04 images]# virsh attach-disk --domain ehs-rac-01 --source /var/lib/libvirt/images/ehs-rac-01-c.qcow2 --target sdc --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistent 成功附加磁盘 [root@ehs-as-04 images]# virsh attach-disk --domain ehs-rac-01 --source /var/lib/libvirt/images/ehs-rac-01-d.qcow2 --target sdd --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistent 成功附加磁盘 [root@ehs-as-04 images]# virsh attach-disk --domain ehs-rac-01 --source /var/lib/libvirt/images/ehs-rac-01-e.qcow2 --target sde --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistent 成功附加磁盘 [root@ehs-as-04 images]# virsh attach-disk --domain ehs-rac-01 --source /var/lib/libvirt/images/ehs-rac-01-f.qcow2 --target sdf --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistent 成功附加磁盘
注意:这里的 --source 后面必须跟绝对路径;
参数说明:
--persistent:会让此操作同时对运行的虚拟机以及虚拟机的xml文件都会生效;
--target:设定在虚拟机中此设备的设备文件名称,最好在添加硬盘之前到虚拟机中先查看确认一下磁盘设备名称;然后此处设置名称顺延,比如我的虚拟机中原来只有一块盘,其设备文件名为vda,所以我这里设定为vdb。
--targetbus:用来设定客户机磁盘的总线类型;
--driver:根据模拟器而定,如果模拟器是qemu则此处的值只能是qemu;
--subdriver:磁盘源的类型;
--sourcetype:磁盘源的大类,这里用的是file,也可以使用block;
查看虚拟机的配置信息:
[root@localhost images]# virsh dumpxml ehs-rac-01 ... <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/libvirt/images/ehs-oracle-01.qcow2'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-a.img'/> <backingStore/> <target dev='vdb' bus='virtio'/> <alias name='virtio-disk1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-b.img'/> <backingStore/> <target dev='vdc' bus='virtio'/> <alias name='virtio-disk2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-c.img'/> <backingStore/> <target dev='vdd' bus='virtio'/> <alias name='virtio-disk3'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-d.img'/> <backingStore/> <target dev='vde' bus='virtio'/> <alias name='virtio-disk4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0e' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-e.img'/> <backingStore/> <target dev='vdf' bus='virtio'/> <alias name='virtio-disk5'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0f' function='0x0'/> </disk> ...
编辑虚拟机配置文件:
[root@localhost images]# virsh edit ehs-rac-01 ... <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/libvirt/images/ehs-oracle-01.qcow2'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-a.img'/> <target dev='vdb' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-b.img'/> <target dev='vdc' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-c.img'/> <target dev='vdd' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-d.img'/> <target dev='vde' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0e' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/ehs-oracle-01-e.img'/> <target dev='vdf' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0f' function='0x0'/> </disk> ...
添加磁盘之后,到虚拟机中查看:
[root@ehs-oracle-01 rules.d]# fdisk -l 磁盘 /dev/vda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000b337a 设备 Boot Start End Blocks Id System /dev/vda1 * 2048 2099199 1048576 83 Linux /dev/vda2 2099200 104857599 51379200 8e Linux LVM 磁盘 /dev/mapper/rhel-root:47.2 GB, 47240445952 字节,92266496 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/mapper/rhel-swap:5368 MB, 5368709120 字节,10485760 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/vdb:4294 MB, 4294967296 字节,8388608 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/vdc:4294 MB, 4294967296 字节,8388608 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/vdd:4294 MB, 4294967296 字节,8388608 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/vde:21.5 GB, 21474836480 字节,41943040 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/vdf:21.5 GB, 21474836480 字节,41943040 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节
然后对磁盘进行分区格式化挂载,使用就行了;