主要步骤：
- vmware宿主机编辑虚拟机配置扩容服务器磁盘并启动虚拟机
- fdisk新建分区
- pvcreate新建物理卷
- vgextend扩展卷组
- lvextend扩容逻辑卷
- xfs_growfs扩容文件系统
1.fdisk新建分区
[root@6_90 ~]# fdisk /dev/sda
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): p
Disk /dev/sda: 429.5 GB, 429496729600 bytes, 838860800 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: 0x0007b2cf
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 419430399 209202176 8e Linux LVM
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (3,4, default 3):
First sector (419430400-838860799, default 419430400):
Using default value 419430400
Last sector, +sectors or +size{K,M,G} (419430400-838860799, default 838860799):
Using default value 838860799
Partition 3 of type Linux and of size 200 GiB is set
Command (m for help): p
Disk /dev/sda: 429.5 GB, 429496729600 bytes, 838860800 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: 0x0007b2cf
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 419430399 209202176 8e Linux LVM
/dev/sda3 419430400 838860799 209715200 83 Linux
Command (m for help): t
Partition number (1-3, default 3): 3
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: 429.5 GB, 429496729600 bytes, 838860800 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: 0x0007b2cf
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 419430399 209202176 8e Linux LVM
/dev/sda3 419430400 838860799 209715200 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
根据提示需要同步磁盘
[root@6_90 ~]# partprobe
[root@6_90 ~]# fdisk -l
Disk /dev/sda: 429.5 GB, 429496729600 bytes, 838860800 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: 0x0007b2cf
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 419430399 209202176 8e Linux LVM
/dev/sda3 419430400 838860799 209715200 8e Linux LVM
Disk /dev/mapper/centos-root: 193.2 GB, 193248362496 bytes, 377438208 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: 21.0 GB, 20971520000 bytes, 40960000 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
[root@6_90 ~]# pvscan
PV /dev/sda2 VG centos lvm2 [199.51 GiB / 0 free]
Total: 1 [199.51 GiB] / in use: 1 [199.51 GiB] / in no VG: 0 [0 ]
[root@6_90 ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size 199.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 51074
Free PE 0
Allocated PE 51074
PV UUID U7l4WJ-kwxY-DgvQ-eZX3-F3YG-71GI-O54rin
2.pvcreate新建物理卷
[root@6_90 ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created
3.vgextend扩展卷组
[root@6_90 ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "centos" using metadata type lvm2
[root@6_90 ~]# vgextend centos /dev/sda3
Volume group "centos" successfully extended
4.lvextend扩容逻辑卷
[root@6_90 ~]# lvscan
ACTIVE '/dev/centos/swap' [19.53 GiB] inherit
ACTIVE '/dev/centos/root' [179.98 GiB] inherit
[root@6_90 ~]# ls /dev/mapper/centos-root
/dev/mapper/centos-root
[root@6_90 ~]# lvextend -l +100%FREE /dev/mapper/centos-root
Size of logical volume centos/root changed from 179.98 GiB (46074 extents) to 379.97 GiB (97273 extents).
Logical volume root successfully resized.
5.xfs_growfs扩容文件系统
[root@6_90 ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/centos-root xfs 180G 3.7G 177G 3% /
devtmpfs devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs tmpfs 3.9G 281M 3.6G 8% /run
tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 xfs 497M 126M 371M 26% /boot
tmpfs tmpfs 783M 0 783M 0% /run/user/1000
[root@6_90 ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=11794944 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=47179776, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=23037, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 47179776 to 99607552
[root@6_90 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 380G 3.7G 377G 1% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 281M 3.6G 8% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 497M 126M 371M 26% /boot
tmpfs 783M 0 783M 0% /run/user/1000
