Installing LVM

Scenarios

By default, LVM is not installed in the ECS operating system (OS), and you need to manually install it. This section shows how to check whether LVM is installed on your ECS and how to install LVM.

In this section, CentOS 7.5 64bit is used as the sample OS. The method for formatting an EVS disk varies depending on the OS running on the server. This section is used for reference only.

Prerequisites

You have an ECS and have bound an EIP to the ECS.

Procedure

Log in to the ECS as user root.
Run the following command to check whether LVM is installed:
rpm -qa |grep lvm2
```
[root@ecs-lvmtest ~]# rpm -qa |grep lvm2
lvm2-libs-2.02.177-4.el7.x86_64
lvm2-2.02.177-4.el7.x86_64
```
- If the preceding information is displayed, LVM has been installed. Go to Creating a Logical Volume Using LVM.
- If the preceding information is not displayed, LVM is not installed. Go to 3.

Run the following command and follow the prompts to install LVM:

yum install lvm2

Information similar to the following is displayed:

......
Installed:
  lvm2.x86_64 7:2.02.177-4.el7

Dependency Installed:
  device-mapper-event.x86_64 7:1.02.146-4.el7                          device-mapper-event-libs.x86_64 7:1.02.146-4.el7
  device-mapper-persistent-data.x86_64 0:0.7.3-3.el7                   lvm2-libs.x86_64 7:2.02.177-4.el7

Dependency Updated:
  device-mapper.x86_64 7:1.02.146-4.el7                             device-mapper-libs.x86_64 7:1.02.146-4.el7

Complete!

When Complete! is displayed, LVM is successfully installed.

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