[root@C111 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 485M     0  485M   0% /dev
tmpfs                    496M     0  496M   0% /dev/shm
tmpfs                    496M  7.1M  489M   2% /run
tmpfs                    496M     0  496M   0% /sys/fs/cgroup
/dev/mapper/centos-root  2.6G  2.1G  534M  80% /
/dev/sda1               1014M  168M  847M  17% /boot
tmpfs                    100M     0  100M   0% /run/user/0

[root@C111 ~]# fdisk -l

Disk /dev/sda: 6442 MB, 6442450944 bytes, 12582912 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000cb77f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200     8388607     3144704   8e  Linux LVM

Disk /dev/mapper/centos-root: 2785 MB, 2785017856 bytes, 5439488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-swap: 432 MB, 432013312 bytes, 843776 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

添加硬盘后, 分区 /dev/sda ,   /dev/sda5

[root@C111 ~]# fdisk -l

Disk /dev/sda: 6442 MB, 6442450944 bytes, 12582912 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000cb77f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200     8388607     3144704   8e  Linux LVM
/dev/sda3         8388608    12582911     2097152    5  Extended
/dev/sda5         8390656    12582911     2096128   83  Linux

Disk /dev/mapper/centos-root: 2785 MB, 2785017856 bytes, 5439488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-swap: 432 MB, 432013312 bytes, 843776 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

创建 PV

[root@C111 ~]# pvcreate /dev/sda5
Physical volume "/dev/sda5" successfully created.
[root@C111 ~]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               centos
  PV Size               <3.00 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              767
  Free PE               0
  Allocated PE          767
  PV UUID               C0yRML-QxbR-8pkp-qtEJ-Vu22-uoGz-dVFKhs

  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               centos
  PV Size               <2.00 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              511
  Free PE               0
  Allocated PE          511
  PV UUID               HeWNxb-qvt5-RuU2-Ni1I-33Xw-BJw8-qORUsF

/dev/sda5 加入到 VG centos 下

[root@C111 ~]# vgextend centos /dev/sda5
  Volume group "centos" successfully extended

剩余 100% 容量分给 centos/root 分区

[root@C111 ~]# lvextend -l +100%FREE /dev/centos/root
  Size of logical volume centos/root changed from 2.59 GiB (664 extents) to <4.59 GiB (1175 extents).
  Logical volume centos/root successfully resized.

刷新分区表

[root@C111 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 485M     0  485M   0% /dev
tmpfs                    496M     0  496M   0% /dev/shm
tmpfs                    496M  7.1M  489M   2% /run
tmpfs                    496M     0  496M   0% /sys/fs/cgroup
/dev/mapper/centos-root  2.6G  2.1G  534M  80% /
/dev/sda1               1014M  168M  847M  17% /boot
tmpfs                    100M     0  100M   0% /run/user/0
[root@C111 ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=169984 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=679936, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 679936 to 1203200
[root@C111 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 485M     0  485M   0% /dev
tmpfs                    496M     0  496M   0% /dev/shm
tmpfs                    496M  7.1M  489M   2% /run
tmpfs                    496M     0  496M   0% /sys/fs/cgroup
/dev/mapper/centos-root  4.6G  2.1G  2.6G  46% /
/dev/sda1               1014M  168M  847M  17% /boot
tmpfs                    100M     0  100M   0% /run/user/0