创建LVM分区
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shell> fdisk /dev/xvdb #### 选择磁盘
Command (m
for
help): m #### 帮助
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print
this
menu
n add a
new
partition
o create a
new
empty DOS partition table
p print the partition table
q quit without saving changes
s create a
new
empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m
for
help): n #### 创建新的分区
Command action
e extended
p primary partition (1-4)
p #### 创建主分区
Partition number (1-4):1 #### 分区ID
First cylinder (1-65270,
default
1):
Using
default
value 1
Last cylinder, +cylinders or +size{K,M,G} (1-65270,
default
65270):
Using
default
value 65270
Command (m
for
help):t #### 修改分区类型
Command (m
for
help):8e #### Linux lvm
Command (m
for
help):w #### 保存修改
shell> pvcreate /dev/xvdb1/ #### 创建新的pv卷
shell> pvs #### 查看pv卷
shell> vgcreate datavg /dev/xvdb1/ #### 创建新的vg卷
shell> vgs #### 查看vg卷
shell> lvcreate -L 50G -n lv1 datavg #### 创建逻辑卷 -L 指定分区大小 -n 指定lvm名称
shell> mkfs.xfs /dev/datavg/lv1 #### 使用mkfs.ext4命令在逻辑卷lvmServer上创建ext4文件系统
shell> mount /dev/datavg/lv1 /server/ #### 挂在分区到本地目录/server
shell> vi /etc/fstab #### 修改fstab 开机自动挂载
#
# /etc/fstab
# Created by anaconda on Thu Aug 14 21:16:42 2014
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=94e4e384-0ace-437f-bc96-057dd64f42ee / ext4 defaults,barrier=0 1 1
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/datavg/lv1 /data xfs defaults 0 0
:wq
#### 保存重启测试
注意：
* fstab一定要正确填写路径,一旦出错,可能无法正常启动.
* 可以在rc.local使用mount命令进行挂载
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对挂载的逻辑卷进行扩容
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lvextend –L +2G /dev/datavg/lv1
对lv1进行在线(动态)扩容
e2fsck -f /dev/vg1/lv1 #检查磁盘错误 (ext4执行)
resize2fs /dev/vg1/lv1 #更新逻辑卷信息(ext4执行)
xfs_growfs /dev/vg1/lv1 #xfs文件系统需要执行
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参考链接：
http://blog.csdn.net/alone_map/article/details/51850381
https://my.oschina.net/u/3791387/blog/1633523