【Centos7扩容】硬盘扩容了，分区没增加

程序员文章站 2024-03-09 10:00:59

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1.安装growpart扩容格式化工具

yum install cloud-utils-growpart

2.查看现有磁盘大小

Disk /dev/vda: 214.7 GB, 214748364800 bytes
16 heads, 63 sectors/track, 416101 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0004485a

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3        1018      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2            1018      416101   209201880   8e  Linux LVM

3.调用growpart

为需要扩容的磁盘和对应的第几个分区扩容

[email protected] ~]# growpart /dev/vda 2
#注意：/dev/vda空格2

4.resize2fs扩容文件系统

为系统盘的/dev/vda2分区扩容文件系统。

bin/                     .cshrc                   .ssh/                    
[[email protected] ~]# resize2fs /dev/vda2 
resize2fs 1.41.12 (17-May-2010)
resize2fs: Device or resource busy while trying to open /dev/vda2
Couldn't find valid filesystem superblock.

5.重置pv大小

pvresize /dev/vda2

6.查看pvdisplay、vgdisplay

[[email protected] ~]# pvdisplay 
  --- Physical volume ---
  PV Name               /dev/vda2
  VG Name               centos
  PV Size               199.51 GiB / not usable 1.71 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              51074
  Free PE               0
  Allocated PE          51074
  PV UUID               yIPcHy-b8cu-eF0k-pVE1-sST5-zPQh-AuBiV6
   
[[email protected] ~]# vgdisplay 
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  13
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               199.51 GiB
  PE Size               4.00 MiB
  Total PE              51074
  Alloc PE / Size       51074 / 199.51 GiB
  Free  PE / Size       0 / 0   
  VG UUID               Nx8x06-EHnj-LdVA-Uj5p-XenV-dAZy-FXwN5e

6.Free空间分配

lvextend -l +100%free /dev/mapper/centos-root

7.重置大小

resize2fs /dev/mapper/centos-root