目录
一、查看卷组信息
查看服务器
卷组（VG）
、
物理卷（PV）
、
逻辑卷（LV）
相关信息。
vgscan
：查找系统中存在的LVM卷组。显示卷组名和LVM元数据类型。
vgdisplay
：查看卷组详细信息。
pvscan
：查看系统中所有连接硬盘，显示出物理卷。
lvscan
：查看所有LVM的逻辑卷（LV）。
新增硬盘后，用
fdisk -l
命令，查看新增硬盘。
二、新建一个分区partition
新建一个主分区（primary partition）或逻辑分区（logical partition）
[root@getlnx20 ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xaa12f277.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-10443, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-10443, default 10443):
Using default value 10443
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
三、创建物理卷pv
[root@getlnx20 ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created
[root@getlnx20 ~]# pvscan
PV /dev/sda2 VG VolGroup00 lvm2 [39.51 GiB / 0 free]
PV /dev/sdb1 lvm2 [80.00 GiB]
Total: 2 [119.51 GiB] / in use: 1 [39.51 GiB] / in no VG: 1 [80.00 GiB]
四、创建卷组vg
[root@getlnx20 ~]# vgcreate -s 32M VolGroup01 /dev/sdb1
Volume group "VolGroup01" successfully created
[root@getlnx20 ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "VolGroup01" using metadata type lvm2
Found volume group "VolGroup00" using metadata type lvm2
五、查看vg可用空间
[root@getlnx20 ~]# vgdisplay
--- Volume group ---
VG Name VolGroup01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 79.97 GiB
PE Size 32.00 MiB
Total PE 2559
Alloc PE / Size 0 / 0
Free PE / Size 2559 / 79.97 GiB
VG UUID FD5kEp-a9Cv-K181-Xb7e-i8k4-zV52-Dbuxc3
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 39.51 GiB
PE Size 4.00 MiB
Total PE 10114
Alloc PE / Size 10114 / 39.51 GiB
Free PE / Size 0 / 0
VG UUID sWwXef-0AHf-66ZI-dZHh-JuJt-KMj7-YqIisW
六、建立逻辑卷lv
[root@getlnx20 ~]# lvcreate -L79.97G -n LogVol00 VolGroup01
Rounding up size to full physical extent 80.00 GiB
Volume group "VolGroup01" has insufficient free space (2559 extents): 2560 required.
[root@getlnx20 ~]# lvcreate -L79.96G -n LogVol00 VolGroup01
Rounding up size to full physical extent 79.97 GiB
Logical volume "LogVol00" created
[root@getlnx20 ~]# lvscan
ACTIVE '/dev/VolGroup01/LogVol00' [79.97 GiB] inherit
ACTIVE '/dev/VolGroup00/lv_root' [31.51 GiB] inherit
ACTIVE '/dev/VolGroup00/lv_swap' [8.00 GiB] inherit
七、建立文件系统
[root@getlnx20 ~]# mkfs -t ext3 /dev/VolGroup01/LogVol00
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
5242880 inodes, 20963328 blocks
1048166 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
640 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
八、建立挂载点
[root@getlnx20 ~]# mkdir /mysqldata
九、挂载存储
[root@getlnx20 ~]# mount /dev/VolGroup01/LogVol00 /mysqldata
[root@getlnx20 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-lv_root
31G 2.5G 27G 9% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
/dev/sda1 477M 33M 419M 8% /boot
/dev/mapper/VolGroup01-LogVol00
79G 184M 75G 1% /mysqldata
十、修改fstab配置文件实现自动挂载
[root@getlnx20 ~]# more /etc/fstab
#
# /etc/fstab
# Created by anaconda on Sat Jun 13 10:29:07 2015
#
# 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
#
/dev/mapper/VolGroup00-lv_root / ext4 defaults 1 1
UUID=5486634e-ec6a-42d5-bbb9-dcd92537c294 /boot ext4 defaults 1 2
/dev/mapper/VolGroup00-lv_swap swap swap defaults 0 0
/dev/VolGroup01/LogVol00 /mysqldata ext3 defaults 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
十一、卸载卷组的逻辑卷lv
先 df -h 查看卷组信息，
/dev/mapper/VolGroup05-LogVol00 178G 48G 121G 29% /u05然后再 vgdisplay 查看pv、lv信息
[root@getlnx01uat ~]# vgdisplay -v VolGroup05
Using volume group(s) on command line
Finding volume group "VolGroup05"
--- Volume group ---
VG Name VolGroup05
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 179.97 GB
PE Size 32.00 MB
Total PE 5759
Alloc PE / Size 5759 / 179.97 GB
Free PE / Size 0 / 0
VG UUID UNFxZH-lAGM-vqF3-jtNK-yuKT-enUX-WwL7FQ
--- Logical volume ---
LV Name /dev/VolGroup05/LogVol00
VG Name VolGroup05
LV UUID kCTJnc-D3zQ-QiJp-TfPh-ivWs-WKyW-VvGTod
LV Write Access read/write
LV Status available
# open 1
LV Size 179.97 GB
Current LE 5759
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Physical volumes ---
PV Name /dev/sdg5
PV UUID VbSwjS-9ckQ-ZfWf-bl8g-oPWQ-TMBi-H6oMWv
PV Status allocatable
Total PE / Free PE 5759 / 0接下来卸载卷组逻辑卷
[root@getlnx01uat ~]# umount /dev/VolGroup05/LogVol00
或
[root@getlnx01uat ~]# umount /u05
十二、删除逻辑卷lv
[root@getlnx01uat ~]# lvremove /dev/VolGroup05/LogVol00
Do you really want to remove active logical volume LogVol00? [y/n]: y
Logical volume "LogVol00" successfully removed验证lv是否删除
[root@getlnx01uat ~]# lvdisplay | grep "dev/VolGroup05/LogVol00
十三、删除卷组vg
[root@getlnx01uat ~]# vgremove VolGroup05
Volume group "VolGroup05" successfully removed采用安全方法删除卷组vg，用 vgchange -a n VolGroup05 关闭了vg_name，然后才可以删除它。
[root@getlnx01uat ~]# vgchange -a n VolGroup05
0 logical volume(s) in volume group "VolGroup05" now active
[root@getlnx01uat ~]# vgremove VolGroup05
Volume group "VolGroup05" successfully removed验证卷组vg是否删除
[root@getlnx01uat ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "VolGroup04" using metadata type lvm2
Found volume group "VolGroup03" using metadata type lvm2
Found volume group "VolGroup02" using metadata type lvm2
Found volume group "VolGroup01" using metadata type lvm2
Found volume group "VolGroup00" using metadata type lvm2
十四、删除物理卷pv
[root@getlnx01uat ~]# pvremove /dev/sdg5
Labels on physical volume "/dev/sdg5" successfully wiped
[root@getlnx01uat ~]# pvscan
PV /dev/sde5 VG VolGroup04 lvm2 [139.97 GB / 0 free]
PV /dev/sdd5 VG VolGroup03 lvm2 [199.97 GB / 0 free]
PV /dev/sdc5 VG VolGroup02 lvm2 [199.97 GB / 0 free]
PV /dev/sdb5 VG VolGroup01 lvm2 [79.97 GB / 0 free]
PV /dev/sda2 VG VolGroup00 lvm2 [51.88 GB / 0 free]
PV /dev/sdf5 VG VolGroup00 lvm2 [59.97 GB / 0 free]
Total: 6 [731.72 GB] / in use: 6 [731.72 GB] / in no VG: 0 [0 ]
十五、编辑/etc/fstab，删除对应挂载信息
这一步是为了避免重启时会报错。先用下面的命令，把系统文件权限改为rw读写。然后编辑/etc/fstab，删除挂载信息，重启即可。
mount -o remount, rw / 本文参考：
Linux LVM学习总结——创建卷组VG
by 潇湘隐者
https://www.cnblogs.com/kerrycode/p/4612925.html
Linux LVM学习总结——删除卷组VG
by 潇湘隐者
https://www.cnblogs.com/kerrycode/p/4569515.html
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