1、查看现有磁盘大小：

root@inboc-nfs:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev             16G     0   16G   0% /dev
tmpfs           3.2G  1.2M  3.2G   1% /run
/dev/sda4       195G  4.7G  191G   3% /
tmpfs            16G     0   16G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            16G     0   16G   0% /sys/fs/cgroup
/dev/sdc1       5.0T  4.8T  228G  96% /mnt
/dev/sdb1        10T  2.8T  7.3T  28% /srv
/dev/sda2      1014M  180M  835M  18% /boot
tmpfs           3.2G     0  3.2G   0% /run/user/0

2、在虚拟机管理界面中将sdc磁盘扩容至7T

3、在虚拟机中扩容磁盘后，需要重新启动虚拟机。重启虚拟机后我接下来将为/dev/sdc1分区进行扩容

root@inboc-nfs:~# parted /dev/sdc
GNU Parted 3.2
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Warning: Not all of the space available to /dev/sdc appears to be used, you can fix the GPT to use all of the space (an extra 4294967296 blocks) or continue with the current setting? 
Fix/Ignore? ^C                                                            
Model: VMware Virtual disk (scsi)
Disk /dev/sdc: 7697GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name              Flags
 1      1049kB  5498GB  5498GB  xfs          Linux filesystem

(parted) resizepart 1                                                     
Warning: Partition /dev/sdc1 is being used. Are you sure you want to continue?
Yes/No? yes
 End?  [7397GB]? 7697GB                                                    
(parted) p                                                                
Model: VMware Virtual disk (scsi)
Disk /dev/sdc: 7697GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name              Flags
 1      1049kB  7697GB  7697GB  xfs          Linux filesystem                                                         

4、现在磁盘和分区的大小已经扩容了，但是当我们使用df命令查看时，分区的容量还是5T，因此我们还需要刷新文件系统的大小

root@inboc-nfs:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev             16G     0   16G   0% /dev
tmpfs           3.2G  1.2M  3.2G   1% /run
/dev/sda4       195G  4.7G  191G   3% /
tmpfs            16G     0   16G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            16G     0   16G   0% /sys/fs/cgroup
/dev/sdc1       5.0T  4.8T  228G  96% /mnt
/dev/sdb1        10T  2.8T  7.3T  28% /srv
/dev/sda2      1014M  180M  835M  18% /boot
tmpfs           3.2G     0  3.2G   0% /run/user/0
root@inboc-nfs:~# xfs_growfs /dev/sdc1
meta-data=/dev/sdc1              isize=512    agcount=5, agsize=268435455 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1 spinodes=0 rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=1342177019, imaxpct=5
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=521728, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 1342177019 to 1879047931
root@inboc-nfs:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev             16G     0   16G   0% /dev
tmpfs           3.2G  1.2M  3.2G   1% /run
/dev/sda4       195G  4.7G  191G   3% /
tmpfs            16G     0   16G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            16G     0   16G   0% /sys/fs/cgroup
/dev/sdc1       7.0T  4.8T  2.3T  69% /mnt
/dev/sdb1        10T  2.8T  7.3T  28% /srv
/dev/sda2      1014M  180M  835M  18% /boot
tmpfs           3.2G     0  3.2G   0% /run/user/0