linux 扩展文件系统

1. 创建新分区

[root@localhost ~]# fdisk -l

Disk /dev/sda: 32.2 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: 0x000a8293

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

Disk /dev/mapper/cl-root:  MB,  bytes,  sectors
Units = sectors of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes

Disk /dev/mapper/cl-swap:  MB,  bytes,  sectors
Units = sectors of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes

[root@localhost ~]# 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 ): +2G
Partition  of type Linux and of size  GiB is set

Command (m for help): p

Disk /dev/sda: 32.2 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: 0x000a8293

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

Command (m for help): t 　　# 修改文件系统类型
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: 32.2 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: 0x000a8293

   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!

2. partprobe

[root@localhost named]# partprobe

3. 创建 pv

[root@localhost ~]# pvcreate /dev/sda3
  Physical volume "/dev/sda3" successfully created.
[root@localhost ~]# pvdisplay 　　
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               cl
  PV Size               9.80 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE
  Free PE
  Allocated PE
  PV UUID               vBCY0m-syaR-HKNJ-FNlW-G7Ql-2eru-4ccPC6

  "/dev/sda3" is a new physical volume of "2.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sda3
  VG Name
  PV Size               2.00 GiB
  Allocatable           NO
  PE Size
  Total PE
  Free PE
  Allocated PE
  PV UUID               kRvof2-gzMz-raeu-njD7-vujG-N45B-yJemBd

4. 将 pv 添加到 vg

[root@localhost ~]# vgextend cl /dev/sda3
  Volume group "cl" successfully extended
[root@localhost ~]# vgs
  VG #PV #LV #SN Attr   VSize  VFree
  cl          wz--n- .80g .00g
[root@localhost ~]# pvs
  PV         VG Fmt  Attr PSize PFree
  /dev/sda2  cl lvm2 a--  .80g
  /dev/sda3  cl lvm2 a--  .00g .00g

5. 扩展 lv

[root@localhost ~]# lvextend /dev/cl/root /dev/sda3
  Size of logical volume cl/root changed from 7.80 GiB ( extents) to 9.80 GiB ( extents).
  Logical volume cl/root successfully resized.

6. 扩展文件系统的逻辑边界

[root@localhost ~]# xfs_growfs /dev/cl/root
meta-data=/dev/mapper/cl-root    isize=    agcount=, agsize= blks
         =                       sectsz=   attr=, projid32bit=
         =                       crc=        finobt= spinodes=
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
[root@localhost ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  .8G 1021M  .8G  % /
devtmpfs             .9G       .9G   % /dev
tmpfs                .9G       .9G   % /dev/shm
tmpfs                .9G  8.6M  .9G   % /run
tmpfs                .9G       .9G   % /sys/fs/cgroup
/dev/sda1            197M  117M   81M  % /boot
tmpfs                378M       378M   % /run/user/
[root@localhost ~]#