虚拟镜像的扩展工作在rbd块设备上进行的操作
1 rbd操作
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os.system("ssh -o StrictHostKeyChecking=no " + serviceIp + " rbd resize " + image + " --size " + str(size*1024));
2 [root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
13G 1.6G 11G 14% /
tmpfs 246M 0 246M 0% /dev/shm
/dev/sda1 485M 33M 428M 8% /boot
[root@localhost ~]#
[root@localhost ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x00053901
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 1959 15215616 8e Linux LVM
Disk /dev/mapper/VolGroup-lv_root: 13.5 GB, 13463715840 bytes
255 heads, 63 sectors/track, 1636 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: 2113 MB, 2113929216 bytes
255 heads, 63 sectors/track, 257 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
分区已经扩展，如果使用需要对磁盘进行分区扩展操作
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2 qemu-img 操作
os.system("ssh -o StrictHostKeyChecking=no " + serviceIp + "qemu-img resize rbd:" + image + str(size*1024));
[root@kvm9100 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
13G 1.6G 11G 14% /
tmpfs 246M 0 246M 0% /dev/shm
/dev/sda1 485M 33M 428M 8% /boot
/dev/sda3 6.9G 144M 6.4G 3% /mnt
[root@kvm9100 ~]# fdisk -l
Disk /dev/sda: 23.6 GB, 23622320128 bytes
255 heads, 63 sectors/track, 2871 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: 0x00053901
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 1959 15215616 8e Linux LVM
/dev/sda3 1959 2871 7332667+ 83 Linux
Disk /dev/mapper/VolGroup-lv_root: 13.5 GB, 13463715840 bytes
255 heads, 63 sectors/track, 1636 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: 2113 MB, 2113929216 bytes
255 heads, 63 sectors/track, 257 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
分区扩展操作后：
[root@localhost mnt]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup-lv_root
12941636 1655468 10628760 14% /
tmpfs 251308 0 251308 0% /dev/shm
/dev/sda1 495844 32968 437276 8% /boot
/dev/sda3 5153880 141304 4750768 3% /mnt
