0.查看根分区大小
[root@master ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 63G 0 63G 0% /dev
tmpfs 63G 0 63G 0% /dev/shm
tmpfs 63G 1.3G 62G 2% /run
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/mapper/cl_geekthings-root 50G 38G 13G 76% /
/dev/sda1 1014M 311M 704M 31% /boot
/dev/mapper/cl_geekthings-home 918G 12G 906G 2% /home
tmpfs 13G 12K 13G 1% /run/user/42
tmpfs 13G 0 13G 0% /run/user/0
overlay 50G 38G 13G 76% /var/lib/docker/overlay2/70dffe831895bb55d79b4a8f483364a4f736637ccb2f6694f1cf82ba7ff1743d/merged
1.查看磁盘编号
[root@master ~]# ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2
2.这里在vMware vCenter中新增一块硬盘(编辑->新增设备) 再次查看磁盘
[root@master ~]# ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb
3.对新增硬盘进行分区, 这里新增的磁盘名称叫 /dev/sdb
[root@localhost ~]# fdisk /dev/sdb
# 输入 m, 得到帮助，可以按照提示操作进行分区了
# 因为这块硬盘只有 100G，所以我只打算分一个区，这里是需要输入 n，然后接下来都按 Enter 键，默认即可，最后输入 w 保存退出
[root@localhost ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
4.将分区后的磁盘格式化成xfs类型
[root@localhost ~]# mkfs.xfs /dev/sdb1
5.创建pv
[root@master ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created.
6.查看vg组
[root@master ~]# vgs
VG #PV #LV #SN Attr VSize VFree
cl_geekthings 1 3 0 wz--n- <999.00g 4.00m
7.扩展vg
[root@master ~]# vgextend cl_geekthings /dev/sdb1
Volume group "cl_geekthings" successfully extended
[root@master ~]# vgs
VG #PV #LV #SN Attr VSize VFree
cl_geekthings 2 3 0 wz--n- 1.17t 200.00g
8.扩展lv
[root@master ~]# lvextend -L +200G /dev/mapper/cl_geekthings-root
Size of logical volume cl_geekthings/root changed from 50.00 GiB (12800 extents) to 250.00 GiB (64000 extents).
Logical volume cl_geekthings/root successfully resized.
9.系统重新读取大小
[root@master ~]# xfs_growfs /dev/mapper/cl_geekthings-root
meta-data=/dev/mapper/cl_geekthings-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 65536000
10.查看扩容是否成功
[root@master ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 63G 0 63G 0% /dev
tmpfs 63G 0 63G 0% /dev/shm
tmpfs 63G 1.3G 62G 2% /run
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/mapper/cl_geekthings-root 250G 38G 213G 16% /
/dev/sda1 1014M 311M 704M 31% /boot
/dev/mapper/cl_geekthings-home 918G 12G 906G 2% /home
tmpfs 13G 12K 13G 1% /run/user/42
tmpfs 13G 0 13G 0% /run/user/0
overlay 250G 38G 213G 16% /var/lib/docker/overlay2/70dffe831895bb55d79b4a8f483364a4f736637ccb2f6694f1cf82ba7ff1743d/merged
[root@master ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1000G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 999G 0 part
├─cl_geekthings-root 253:0 0 250G 0 lvm /
├─cl_geekthings-swap 253:1 0 31.5G 0 lvm
└─cl_geekthings-home 253:2 0 917.5G 0 lvm /home
sdb 8:16 0 200G 0 disk
└─cl_geekthings-root 253:0 0 250G 0 lvm /
sr0 11:0 1 4.1G 0 rom