vmware virtual machine disk expansion step tutorial

1. Enter the virtual machine settings externally and expand the disk first. The specific prompts are as shown in the figure below:

2. After the disk expansion is successful, log in to the virtual machine and first check the basic situation of the memory before expansion.

# 查看分区使用情况
df -h

3. After clarifying the partition, first check the partition information to determine the partition status.

# 查看系统分区信息
fdisk -l

(1) Disk /dev/sda: 53.7GB – The system contains a hard disk internally recognized as disk /dev/sda by the system, with a memory of 53.7G.

(2) Disk /dev/mapper/centos-swap: 2147M and disk /dev/mapper/centos-root: 18.2 GB – The two physical identifiers representing the system partition correspond to the partitions /dev/sda1 and /dev/ respectively. sda2.

4. Based on the directory information and partition information, it is determined that there are two partitions and partition sda3 needs to be added.

# 先进入dev目录
cd /dev
# 查看目录基本信息

5. Configure sda ​​disk information.

# 进入管理sda磁盘
fdisk /dev/sda
# 根据提示m查看帮助文档
m
# 选择n添加新的分区
n
# 接着创建主分区
p
# 有可能以前操作过的原因，保留了一个空闲的分区，如果有选择分区的话，默认即可，都是空的，不影响，回车即可
# 接着默认大小，直接回车即可
# 选择默认的start cylinder
# 保存修改

6. Restart the virtual machine and go to the dev directory to check the information. The partition sda3 appears, as shown below.

# 重新到dev目录
cd /dev
# 查看信息,出现分区如下图

7. Format the disk device with Ext4.

# 对磁盘设备进行Ext4格式化处理
mkfs.ext4 /dev/sda3

8. Add new LVM to the existing LVM group to achieve volume expansion.

# 进入逻辑卷管理
lvm
# 初始化分区
pvcreate /dev/sda3
# 将初始化过的分区加入到虚拟卷组centos
vgextend centos /dev/sda3
# 显示VG卷组的信息
vgdisplay

9. Expand the capacity of the existing volume. Please note that the following parameter value is the value of free PE /Site, as shown in the figure above.

# 扩展已有卷的容量（下面的参数值为free PE /Site的值）
lvextend -l+7679 /dev/mapper/centos-root
# 查看VG卷组的容量，如下图所示
vgdisplay

10. After the volume expansion is completed, go to the file system expansion and check the mount point of the root directory.

# 先退出逻辑卷管理
exit
# 回到根目录
cd ../
# centos7文件系统扩容
xfs_growfs /dev/mapper/centos-root
# centos6文件系统扩容
resize2fs /dev/mapper/centos-root
# 查看根目录的挂载点
df -h

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