Shulou(Shulou.com)06/01 Report--

In this issue, Xiaobian will bring you about how centos7.2 LVM expands a mounted logical volume. The article is rich in content and analyzes and narrates it from a professional perspective. After reading this article, I hope you can gain something.

[root@node1 ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/centos-root 50G 19G 32G 38% /

devtmpfs 5.7G 0 5.7G 0% /dev

tmpfs 5.7G 0 5.7G 0% /dev/shm

tmpfs 5.7G 8.4M 5.7G 1% /run

tmpfs 5.7G 0 5.7G 0% /sys/fs/cgroup

/dev/mapper/centos-home 44G 42G 2.6G 95% /home

/dev/sda1 497M 124M 374M 25% /boot

tmpfs 1.2G 0 1.2G 0% /run/user/0

Requirements:

Not enough space at home, need to expand 50G

LVM expansion:

fdisk -l

Division:

fdisk /dev/sdb (m-n,p,1)

Creating PV

pvcreate /dev/sdb1

Display pv information

pvdisplay

Display vg information

vgdisplay

Expand VG space

vgextend centos /dev/sdb1

Display LV message

lvdisplay

Increase target logical volume space

lvextend -L +50G /dev/centos/home

acknowledgement information

df -h

If the expanded space size is not displayed, execute the following command

xfs_growfs /dev/centos/home

Results after expansion:

[root@node1 mysql]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/centos-root 50G 19G 32G 38% /

devtmpfs 5.7G 0 5.7G 0% /dev

tmpfs 5.7G 0 5.7G 0% /dev/shm

tmpfs 5.7G 8.4M 5.7G 1% /run

tmpfs 5.7G 0 5.7G 0% /sys/fs/cgroup

/dev/mapper/centos-home 94G 21G 74G 22% /home

/dev/sda1 497M 124M 374M 25% /boot

tmpfs 1.2G 0 1.2G 0% /run/user/0

The above is how centos7.2 LVM expands a mounted logical volume shared by Xiaobian. If you happen to have similar doubts, you may wish to refer to the above analysis for understanding. If you want to know more about it, please pay attention to the industry information channel.

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