系统:centos 5.x
1.exsi扩容图
扩容前:
扩容后:
2.分区前准备
yum -y install parted
ps:CentOS最小化安装默认是没有partprobe命令,所以我们要用yum安装
3.查看目前硬盘状态
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
38G 3.2G 33G 9% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 506M 0 506M 0% /dev/shm
[root@localhost ~]# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 5221 41833260 8e Linux LVM
4.开始对硬盘扩容
[root@localhost ~]# fdisk /dev/sda
The number of cylinders for this disk is set to 7832.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (5222-7832, default 5222):
Using default value 5222
Last cylinder or +size or +sizeM or +sizeK (5222-7832, default 7832):
Using default value 7832
Command (m for help): t (修改分区类型为 Linux LVM, 8e)Partition number (1-4): 3Hex code (type L to list codes): 8eChanged system type of partition 3 to 8e (Linux LVM)
Command (m for help): wq
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
然后再执行:
[root@localhost ~]# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 5221 41833260 8e Linux LVM
/dev/sda3 5222 7832 20972857+ 8e Linux
可以看到sda3已经出现了,表示为可用的状态.下面继续:
[root@localhost ~]# partprobe
[root@localhost ~]# partprobe /dev/sda3
ps:使用fdisk工具只是将分区信息写到磁盘,如果需要mkfs磁盘分区则需要重启系统,而使用partprobe则可以使kernel重新读取分区信息,从而避免重启系统.
5.创建物理卷及加入组
[root@localhost ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created
[root@localhost ~]# vgextend VolGroup00 /dev/sda3
Volume group "VolGroup00" successfully extended
查看物理卷情况
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 59.88 GB
PE Size 32.00 MB
Total PE 1916
Alloc PE / Size 1276 / 39.88 GB
Free PE / Size 640 / 20.00 GB
VG UUID qLjCMX-FZv2-Neha-Nze0-rAoq-p1R0-QV5pLu
[root@localhost ~]# lvresize -L +20G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 58.88 GB
Logical volume LogVol00 successfully resized
[root@localhost ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 15433728 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 15433728 blocks long.
6.验证
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
58G 3.2G 51G 6% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 506M 0 506M 0% /dev/shm
好了,可以看到已经把新增加的容量添加进去了.