给VMware下的Linux扩容磁盘空间到根分区（以centos7.0为例）

一、扩展VMWare硬盘空间

关闭Vmware 的 Linux系统，这样，才能在VMWare菜单中设置：

　　VM -> Settings... -> Hardware -> Hard Disk -> Utilities -> Expand

　　输入你想要扩展到多少G。

二、对新增加的硬盘进行分区、格式化

查看挂载点

# df -Th

[root@localhost ~]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        15G  .2G   14G   % /
devtmpfs                devtmpfs  .9G       .9G   % /dev
tmpfs                   tmpfs     .9G       .9G   % /dev/shm
tmpfs                   tmpfs     .9G  8.6M  .9G   % /run
tmpfs                   tmpfs     .9G       .9G   % /sys/fs/cgroup
/dev/sda1               xfs       197M  110M   88M  % /boot
tmpfs                   tmpfs     378M       378M   % /run/user/

查看硬盘信息

# lsblk

[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               :      150G   disk
├─sda1            :      200M   part /boot
└─sda2            :       17G   part
  ├─centos-root :       15G   lvm  /
  └─centos-swap :        2G   lvm  [SWAP]
sr0              :        4G   rom  

查看逻辑卷

# lvs

[root@localhost ~]# lvs
  LV   VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root centos -wi-ao---- .00g
  swap centos -wi-ao----  .00g   

对扩容的硬盘进行分区

# fdisk /dev/sda

Welcome to fdisk (util-linux 2.23.).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Command (m for help): n
Partition type:
   p   primary ( primary,  extended,  free)
   e   extended
Select (default p): p
Partition number (,, default ):
First sector (-, default ):
Using default value
Last sector, +sectors or +size{K,M,G} (-, default ): +100G
Partition  of type Linux and of size  GiB is set

Command (m for help): p

Disk /dev/sda: 161.1 GB,  bytes,  sectors
Units = sectors of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk label type: dos
Disk identifier: 0x00007397

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *                         Linux
/dev/sda2                     8e  Linux LVM
/dev/sda3                   Linux

Command (m for help): t
Partition number (-, default ):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p

Disk /dev/sda: 161.1 GB,  bytes,  sectors
Units = sectors of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk label type: dos
Disk identifier: 0x00007397

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *                         Linux
/dev/sda2                     8e  Linux LVM
/dev/sda3                 8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.

需要重启才能生效

#reboot

重启后查看硬盘信息

# lsblk

[root@localhost ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               :      150G   disk
├─sda1            :      200M   part /boot
├─sda2            :       17G   part
│ ├─centos-root :       15G   lvm  /
│ └─centos-swap :        2G   lvm  [SWAP]
└─sda3            8:3    0  100G  0 part
sr0              :        4G   rom  

分区格式化

# mkfs -t ext4 /dev/sda3

[root@localhost ~]# mkfs -t ext4 /dev/sda3
mke2fs 1.42. (-Dec-)
Filesystem label=
OS type: Linux
Block size= (log=)
Fragment size= (log=)
Stride= blocks, Stripe width= blocks
 inodes,  blocks
 blocks (5.00%) reserved for the super user
First data block=
Maximum filesystem blocks=
 block groups
 blocks per group,  fragments per group
 inodes per group
Superblock backups stored on blocks:
        , , , , , , , , ,
        , , , , 

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

创建物理卷

#pvcreate /dev/sda3

[root@localhost ~]# pvcreate /dev/sda3
WARNING: xfs signature detected on /dev/sda3 at offset . Wipe it? [y/n]: y
  Wiping xfs signature on /dev/sda3.
  Physical volume "/dev/sda3" successfully created

加入根分区的逻辑卷组

# vgextend centos /dev/sda3

[root@localhost ~]# vgextend centos /dev/sda3
  Volume group "centos" successfully extended

查看确认

[root@localhost ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas
  Metadata Sequence No
  VG Access             read/write
  VG Status             resizable
  MAX LV
  Cur LV
  Open LV
  Max PV
  Cur PV
  Act PV
  VG Size               117.00 GiB
  PE Size               4.00 MiB
  Total PE
  Alloc PE / Size        / 17.00 GiB
  Free  PE / Size        / 100.00 GiB
  VG UUID               a27Boi-C0ue-9PCo-1rPZ-BsjW-9IRg-Woh4uX

扩容

# lvextend -L +100G /dev/centos/root

[root@localhost ~]# lvextend -L +100G /dev/centos/root
  Size of logical volume centos/root changed from 15.00 GiB ( extents) to 115.00 GiB ( extents).
  Logical volume root successfully resized.

操作生效

# xfs_growfs /dev/centos/root

[root@localhost ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=    agcount=, agsize= blks
         =                       sectsz=   attr=, projid32bit=
         =                       crc=        finobt=
data     =                       bsize=   blocks=, imaxpct=
         =                       sunit=      swidth= blks
naming   =version               bsize=   ascii-ci= ftype=
log      =internal               bsize=   blocks=, version=
         =                       sectsz=   sunit= blks, lazy-count=
realtime =none                   extsz=   blocks=, rtextents=
data blocks changed from  to 

查看是否成功扩容

# df -Th

[root@localhost ~]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs       115G  .2G  114G   % /
devtmpfs                devtmpfs  .9G       .9G   % /dev
tmpfs                   tmpfs     .9G       .9G   % /dev/shm
tmpfs                   tmpfs     .9G  8.6M  .9G   % /run
tmpfs                   tmpfs     .9G       .9G   % /sys/fs/cgroup
/dev/sda1               xfs       197M  110M   88M  % /boot
tmpfs                   tmpfs     378M       378M   % /run/user/

# vgdisplay

[root@localhost ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas
  Metadata Sequence No
  VG Access             read/write
  VG Status             resizable
  MAX LV
  Cur LV
  Open LV
  Max PV
  Cur PV
  Act PV
  VG Size               117.00 GiB
  PE Size               4.00 MiB
  Total PE
  Alloc PE / Size        / 117.00 GiB
  Free  PE / Size        /
  VG UUID               a27Boi-C0ue-9PCo-1rPZ-BsjW-9IRg-Woh4uX

参考博客：

Linux中VMware虚拟机增加磁盘空间的扩容操作

https://www.cnblogs.com/matengfei123/p/7986259.html

给VMware下的Linux扩展磁盘空间（以CentOS6.5为例）

https://www.cnblogs.com/shijiaoyun/p/6207699.html

end