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linux系統(tǒng)下如何新增vg大小

更新時間：2024年12月18日 15:12:55 作者：Lfei5120

文章介紹了在Linux系統(tǒng)下新增和擴(kuò)容卷組（VG）的操作步驟,包括添加數(shù)據(jù)盤、創(chuàng)建物理卷（PV）、將PV添加到VG、創(chuàng)建邏輯卷（LV）、賦予文件系統(tǒng)以及掛載LV

linux系統(tǒng)下新增vg大小

最近有很多身邊小伙伴問我呀，linux下面新增vg具體怎么操作，還有l(wèi)inux下面擴(kuò)容已有vg怎么操作，那么接下來，我就帶大家看看我們?nèi)绾涡略龊蛿U(kuò)容。

1.由于資源有限

所以我只能新增10G，哎~~，添加一個10G的數(shù)據(jù)盤。

添加數(shù)據(jù)盤之后我們可以看見的哈，我添加完成之后名字叫sdb，

[root@localhost ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   20G  0 disk 
├─sda1   8:1    0  300M  0 part /boot
├─sda2   8:2    0    2G  0 part [SWAP]
└─sda3   8:3    0 17.7G  0 part /
sdb      8:16   0   10G  0 disk 
sr0     11:0    1 1024M  0 rom  
[root@localhost ~]# fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000dad8d

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      616447      307200   83  Linux
/dev/sda2          616448     4810751     2097152   82  Linux swap / Solaris
/dev/sda3         4810752    41943039    18566144   83  Linux

Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

[root@localhost ~]#

2.創(chuàng)建這塊盤PV

[root@localhost ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   20G  0 disk 
├─sda1   8:1    0  300M  0 part /boot
├─sda2   8:2    0    2G  0 part [SWAP]
└─sda3   8:3    0 17.7G  0 part /
sdb      8:16   0   10G  0 disk 
sr0     11:0    1 1024M  0 rom  
[root@localhost ~]# pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.
[root@localhost ~]#

3.將這一塊盤創(chuàng)建成VG

VG名vgdata1

[root@localhost ~]# vgcreate vgdata1 /dev/sdb
  Volume group "vgdata1" successfully created
[root@localhost ~]# vgs
  VG      #PV #LV #SN Attr   VSize   VFree  
  vgdata1   1   0   0 wz--n- <10.00g <10.00g
[root@localhost ~]#

4.創(chuàng)建一個LV

名稱為Lvdata1，創(chuàng)建完成之后并查看。

[root@localhost ~]# lvcreate -L 9.9G -n Lvdata1 vgdata1 
 Rounding up size to full physical extent 9.90 GiB
  Logical volume "Lvdata1" created.
[root@localhost ~]# cd /dev/mapper/
[root@localhost mapper]# ls
control  vgdata1-Lvdata1
[root@localhost mapper]#

5.將已經(jīng)創(chuàng)建完成的vgdata1-Lvdata1給它賦予文件系統(tǒng)

我在這里就不過多解釋哦~~

[root@localhost ~]# mkfs.ext4 /dev/mapper/
control          vgdata1-Lvdata1  
[root@localhost ~]# mkfs.ext4 /dev/mapper/vgdata1-Lvdata1 
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
648960 inodes, 2595840 blocks
129792 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2151677952
80 block groups
32768 blocks per group, 32768 fragments per group
8112 inodes per group
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done 

[root@localhost ~]#

6.到這一步就算是已經(jīng)完成勒

如果需要掛載的話，那么可以繼續(xù)往下面看哦~~

[root@localhost ~]# lsblk
NAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                 8:0    0   20G  0 disk 
├─sda1              8:1    0  300M  0 part /boot
├─sda2              8:2    0    2G  0 part [SWAP]
└─sda3              8:3    0 17.7G  0 part /
sdb                 8:16   0   10G  0 disk 
└─vgdata1-Lvdata1 253:0    0  9.9G  0 lvm  
sr0                11:0    1 1024M  0 rom  
[root@localhost ~]#

7.需要掛載的話

悄悄告訴大家，需要創(chuàng)建掛載路徑，或者在已經(jīng)有的路徑上進(jìn)行掛載，根據(jù)客戶需要，想掛哪兒就掛哪兒。

在這里我就想掛載到、/opt/a里面

[root@localhost ~]# mkdir /opt/a
[root@localhost ~]# ls /opt
a  rh
[root@localhost ~]# 


在這里就已經(jīng)掛載完成啦，
[root@localhost ~]# mount /dev/mapper/vgdata1-Lvdata1 /opt/a
[root@localhost ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
/dev/sda3                     18G  4.3G   14G  24% /
devtmpfs                     471M     0  471M   0% /dev
tmpfs                        487M     0  487M   0% /dev/shm
tmpfs                        487M  8.6M  478M   2% /run
tmpfs                        487M     0  487M   0% /sys/fs/cgroup
/dev/sda1                    297M  147M  151M  50% /boot
tmpfs                         98M   20K   98M   1% /run/user/1000
tmpfs                         98M     0   98M   0% /run/user/0
/dev/mapper/vgdata1-Lvdata1  9.7G   37M  9.1G   1% /opt/a
[root@localhost ~]#