linux系统下如何新增vg大小

目录

• linux系统下新增vg大小
• 1.由于资源有限
• 3.将这一块盘创建成VG
• 4.创建一个LV
• 5.将已经创建完成的vgdata1-Lvdata1给它赋予文件系统
• 6.到这一步就算是已经完成勒
• 7.需要挂载的话
• 总结

linux系统下新增vg大小

最近有很多身边小伙伴问我呀，linux下面新增vg具体怎么操作，还有linux下面扩容已有vg怎么操作，那么接下来，我就带大家看看我们如何新增和扩容。

1.由于资源有限

所以我只能新增10G，哎~~，添加一个10G的数据盘。

添加数据盘之后我们可以看见的哈，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.创建这块盘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.将这一块盘创建成VG

VG名vgdata1

[root@localhost ~]# vgcreate vgdata1 /dev/sd编程客栈b
  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.创建一个LV

名称为Lvdata1，创建完成之后并查看。

[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.将已经创建完成的vgdata1-Lvdata1给它赋予文件系统

我在这里就不过多解释哦~~

[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, Stripandroide width=0 blocks
648960 inodes, 2595840 blocks
129792 blocks (5.00%) reserved fwww.devze.comor 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         编程客栈                   
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done 

[root@localhost ~]# 

6.到这一步就算是已经完成勒

如果需要挂载的话，那么可以继续往下面看哦~~

[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.需要挂载的话

悄悄告诉大家，需要创建挂载路径，或者在已经有的路径上进行挂载，根据客户需要，想挂哪儿就挂哪儿。

在这里我就想挂载到、/opt/a里面

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


在这里就已经挂载完成啦，
[root@localhost ~]# mount /dev/mapper/vgdata1-Lvdata1 /opt/a
[root@localhost ~]# df -h
Filesystem     android              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 ~]# 

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程客栈(www.devze.com)。