lvm扩容

/dev/sdb
/dev/sdc

1、 通过fdisk创建分区  可参考如下:

#两块磁盘信息

fdisk  /dev/sdc


n
p
1


t
8e
w

[root@master-node ~]# pvcreate /dev/sdb

  Physical volume "/dev/sdb" successfully created
[root@master-node ~]# pvcreate /dev/sdc

  Physical volume "/dev/sdc" successfully created
[root@master-node ~]# 

[root@master-node ~]# vgcreate soft /dev/sdb1
  Volume group "soft" successfully created
    

 [root@master-node ~]# vgreduce soft /dev/sdc1 
  Removed "/dev/sdc1" from volume group "soft"

 
  Total PE              5119    ==   100%FREE

  
             全部大写   卷组名称    lvm命令
  
 lvcreate -l 100%FREE  soft -n      soft01
 
 
             -L200M  指定大写
 
  lvcreate -L200M     soft -n      soft01

  [root@master-node ~]# mkfs.ext4 /dev/soft/soft01 
mke2fs 1.42.13 (17-May-2015)
Creating filesystem with 5241856 4k blocks and 1310720 inodes
Filesystem UUID: bce3312b-5a41-4d12-b4a7-62d440cce327
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000

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

  [root@master-node ~]# mkdir /soft
[root@master-node ~]# mount /dev/soft/soft01 /soft/
[root@master-node ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
udev                         468M     0  468M   0% /dev
tmpfs                         98M  4.6M   93M   5% /run
/dev/mapper/ubuntu--vg-root   19G  2.4G   15G  14% /
tmpfs                        488M     0  488M   0% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        488M     0  488M   0% /sys/fs/cgroup
/dev/sda1                    472M   58M  391M  13% /boot
tmpfs                         98M     0   98M   0% /run/user/1000
/dev/mapper/soft-soft01       20G   44M   19G   1% /soft
[root@master-node ~]# 

pvcreate /dev/sdc1

[root@master-node ~]# vgextend soft /dev/sdc1
  Volume group "soft" successfully extended

  [root@master-node ~]# vgdisplay soft 
  --- Volume group ---
  VG Name               soft
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               39.99 GiB
  PE Size               4.00 MiB
  Total PE              10238
  Alloc PE / Size       5119 / 20.00 GiB
  Free  PE / Size       5119 / 20.00 GiB
  VG UUID               zb5xiT-bM5p-y37X-acNs-Su1Z-WweZ-u5iaM6

写法一： 在现有的空间中添加500M
[root@master-node ~]#  lvextend -L+2G /dev/soft/soft01
  Size of logical volume soft/soft01 changed from 20.00 GiB (5119 extents) to 22.00 GiB (5631 extents).
  Logical volume soft01 successfully resized.


  扩容文件系统
  
  [root@master-node ~]# resize2fs /dev/soft/soft01 
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/soft/soft01 is mounted on /soft; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 2
The filesystem on /dev/soft/soft01 is now 5766144 (4k) blocks long.

[root@master-node ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
udev                         468M     0  468M   0% /dev
tmpfs                         98M  4.6M   93M   5% /run
/dev/mapper/ubuntu--vg-root   19G  2.4G   15G  14% /
tmpfs                        488M     0  488M   0% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        488M     0  488M   0% /sys/fs/cgroup
/dev/sda1                    472M   58M  391M  13% /boot
tmpfs                         98M     0   98M   0% /run/user/1000
/dev/mapper/soft-soft01       22G   44M   21G   1% /soft