LVM2安装使用实操命令过程

相信很多文章写过关于lvm的安装和详细资料，以下为过往记录实际操作的步骤

LVM2安装

直接yum安装：

1. yum install lvm2

fdisk -l

查看物理卷的情况

df -h查看系统盘情况

初始化xvdf分区，创建pv（物理卷）

[root@ip-xxx-xxx-xxx-xxx usr]# pvcreate /dev/xvdf

Physical volume "/dev/xvdf" successfully created

[root@ip-xxx-xxx-xxx-xxx  usr]#

查看物理卷pv信息

[root@ip-xxx-xxx-xxx-xxx usr]#  pvdisplay

"/dev/xvdf" is a new physical volume of "500.00 GiB"

--- NEW Physical volume ---

PV Name               /dev/xvdf

VG Name

PV Size               500.00 GiB

Allocatable           NO

PE Size               0

Total PE              0

Free PE               0

Allocated PE          0

PV UUID               kkRq1o-gnd7-seJx-x19L-Kzn5-K7jf-XkIfmc

创建逻辑卷组vg,将/dev/sdb物理卷加入到这个卷组里

//创建逻辑卷组

[root@ip-xxx-xxx-xxx-xxx ~]# vgcreate DataGroup00 /dev/xvdb2

Volume group "DataGroup00" successfully created

//查看逻辑卷

vgdisplay

创建逻辑卷Data,名称Data00，由卷组DataGroup00提供空间，并给他指定拥有2Tib的空间

//创建逻辑卷

[root@ip-xxx-xxx-xxx-xxx ~]# lvcreate -L 1.99TiB -n Data00 DataGroup00

Rounding up size to full physical extent 1.99 TiB

Logical volume "Data00" created.

[root@ip-xxx-xxx-xxx-xxx ~]# lvdisplay

--- Logical volume ---

LV Path                /dev/bigdata/bigdatavolumn

LV Name                bigdatavolumn

VG Name                bigdata

LV UUID                eCegaT-dPfn-VBLN-obYh-llbK-fdA5-p1zGnU

LV Write Access        read/write

LV Creation host, time ip-xxx-xxx-xxx-xxx, 2017-06-13 09:04:11 +0000

LV Status              available

# open                 1

LV Size                499.99 GiB

Current LE             127998

Segments               1

Allocation             inherit

Read ahead sectors     auto

- currently set to     256

Block device           253:0

--- Logical volume ---

LV Path                /dev/DataGroup00/Data00

LV Name                Data00

VG Name                DataGroup00

LV UUID                inCtpk-GxuQ-EzC2-d2w4-simE-rRzT-rdDokz

LV Write Access        read/write

LV Creation host, time ip-10-30-2-123, 2017-06-15 06:22:47 +0000

LV Status              available

# open                 0

LV Size                1.99 TiB

Current LE             521667

Segments               1

Allocation             inherit

Read ahead sectors     auto

- currently set to     256

Block device           253:1

如何格式化磁盘

mkfs.ext4 /dev/mapper/VolGroup00-LogVol00 

mkfs -t ext4 -c /dev/xvdb1  

挂载

mount /dev/mapper/bigdata-bigdatavolumn /usr/local/

长期固定挂载

vi /etc/fstab

/dev/mapper/bigdata-bigdatavolumn /usr/local/   ext4    defaults        0 0