1、虚拟化平台虚拟机添加硬盘

系统查看添加的硬盘

[root@yumserver ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   50G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   49G  0 part 
  ├─centos-root 253:0    0   44G  0 lvm  /
  └─centos-swap 253:1    0    5G  0 lvm  [SWAP]
sr0              11:0    1  4.4G  0 rom

如果没有显示出来新加的硬盘，则执行下面命令

 echo "- - -">/sys/class/scsi_host/host0/scan
 echo "- - -" >/sys/class/scsi_host/host1/scan
 echo "- - -" >/sys/class/scsi_host/host2/scan

再次查询，发现新添加的sdb已经可以看到了。

[root@yumserver ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   50G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   49G  0 part 
  ├─centos-root 253:0    0   44G  0 lvm  /
  └─centos-swap 253:1    0    5G  0 lvm  [SWAP]
sdb               8:16   0   50G  0 disk 
sr0              11:0    1  4.4G  0 rom

2、parted将sdb分区

[root@yumserver ~]# parted /dev/sdb
GNU Parted 3.1
使用 /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt                                                      
(parted) mkpart primary 0% 100%                                           
(parted) p                                                                
Model: VMware Virtual disk (scsi)
Disk /dev/sdb: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 
Number  Start   End     Size    File system  Name     标志
 1      1049kB  53.7GB  53.7GB               primary
(parted) q                                                                
信息: You may need to update /etc/fstab.
[root@yumserver ~]#

再次查看,发现主分区sdb1出现了

[root@yumserver ~]# lsblk                                                 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   50G  0 disk 
├─sda1            8:1    0  500M  0 part /boot
└─sda2            8:2    0 49.5G  0 part 
  ├─centos-root 253:0    0 47.5G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   50G  0 disk 
└─sdb1            8:17   0   50G  0 part 
sr0              11:0    1 1024M  0 rom  
[root@yumserver ~]#

3 、查看现有vg,lv,确定扩容

[root@yumserver ~]# pvs
  PV         VG     Fmt  Attr PSize   PFree
  /dev/sda2  centos lvm2 a--  <49.51g    0 
[root@yumserver ~]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   1   2   0 wz--n- <49.51g    0 
[root@yumserver ~]# lvs
  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root centos -wi-ao---- <47.51g                                                    
  swap centos -wi-ao----   2.00g                                                    
[root@yumserver ~]#

3 、分别创建pv,扩容vg,扩容lv,扩容文件系统

##此处发现不能tab补全命令, yum install -y bash-completion

[root@yumserver ~]# pvcreate /dev/sdb1
  Physical volume "/dev/sdb1" successfully created.

[root@yumserver ~]# vgextend centos /dev/sdb1
  Volume group "centos" successfully extended

[root@yumserver ~]# lvextend /dev/centos/root -l +100%FREE
  Size of logical volume centos/root changed from <47.51 GiB (12162 extents) to 97.50 GiB (24961 extents).
  Logical volume centos/root successfully resized.

此处为xfs

[root@yumserver ~]# xfs_growfs /dev/centos/root

再次查看,/目录扩容成功

[root@yumserver ~]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 3.9G     0  3.9G    0% /dev
tmpfs                    3.9G     0  3.9G    0% /dev/shm
tmpfs                    3.9G  8.9M  3.9G    1% /run
tmpfs                    3.9G     0  3.9G    0% /sys/fs/cgroup
/dev/mapper/centos-root   98G  1.4G   97G    2% /
/dev/sda1                497M  143M  354M   29% /boot
tmpfs                    783M     0  783M    0% /run/user/0

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参考文档: https://blog.csdn.net/chengrowe/article/details/82352642