LVM扩容

1.为VM添加硬盘空间，名字和大小自定义。

2.登陆到console，确定要扩充的挂载点。

[root@el5enhance16 ~]# df
Filesystem 1K-???? ??? ??????? ??????? 
?dev/mapper/VolGroup00-LogVol00
24218752 21835704 1132952 96% / 
/dev/xvda1 101086 13369 82498 14% 
/boot tmpfs 1048664 0 1048664 0% /dev/shm

3.确认硬盘的分区方式，确定是使用LVM分区方式，并且能看到我们刚才添加的硬盘/dev/xvdb

[root@el5enhance16 ~]# fdisk -l
Disk /dev/xvdd: 258 MB, 258160640 bytes
255 heads, 63 sectors/track, 31 cylinders
Units = ???????of 16065 * 512 = 8225280 bytes

??????? /dev/xvdd ?????????????????????

?isk /dev/xvda: 26.8 GB, 26843545600 bytes 
255 heads, 63 sectors/track, 3263 cylinders
Units = ???????of 16065 * 512 = 8225280 bytes

?????? Boot Start End Blocks Id System

/dev/xvda1 * 1 13 104391 83 Linux
/dev/xvda2 14 3263 26105625 8e Linux LVM

Disk /dev/xvdb: 10.7 GB, 10737418240 bytes 
255 heads, 63 sectors/track, 1305 cylinders 
Units = ???????of 16065 * 512 = 8225280 bytes
??????? /dev/xvdb ?????????????????????

4.添加PV

root@el5enhance16 ~]# pvcreate /dev/xvdb
Physical volume "/dev/xvdb" successfully created

5.查看刚才增加的PV

[root@el5enhance16 ~]# pvdisplay 

6.下面就是将新添的物理卷加入到已有的逻辑卷组中

[root@el5enhance16 ~]# vgextend /dev/VolGroup00 /dev/xvdb 
Volume group "VolGroup00" successfully extended

7.查看卷组的空间

[root@el5enhance16 ~]# vgdisplay

8.查看下分区，确定要扩容的分区

[root@el5enhance16 ~]# lvdisplay

9.开始扩容的操作

[root@el5enhance16 ~]# lvextend -L +9G /dev/VolGroup00/LogVol00

Extending logical volume LogVol00 to 32.84 GB
Logical volume LogVol00 successfully resized

10.使增加的容量生效

[root@el5enhance16 ~]# resize2fs /dev/VolGroup00/LogVol00

11.最后用df在看下现在的空间情况

[root@el5enhance16 ~]# df