磁盘新建分区
fdisk /dev/sda
#列出磁盘分区信息
Command (m for help): p
Disk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 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: 0x000cebcb
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 104857599 51379200 8e Linux LVM
#新增一个分区
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p):
Using default response p
Partition number (3,4, default 3):
First sector (104857600-419430399, default 104857600):
Using default value 104857600
Last sector, +sectors or +size{K,M,G} (104857600-419430399, default 419430399):
Using default value 419430399
Partition 3 of type Linux and of size 150 GiB is set
#修改新分区类型为LVM
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'
#列出磁盘分区信息
Command (m for help): p
Disk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 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: 0x000cebcb
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 104857599 51379200 8e Linux LVM
/dev/sda3 104857600 419430399 157286400 8e Linux LVM
#保存分区
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.
新分区格式磁盘
#重启服务器
reboot
#查看磁盘类型
lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
├─sda1 xfs abeaa8a6-fe72-465e-933a-ddf666f8c7fb /boot
├─sda2 LVM2_member mu3gmi-QeYf-syh9-Untp-6xdV-z0Yx-YU6Wga
│ ├─lvm-root xfs 26b139fd-e009-4a6e-9d1c-445aae31a7b6 /
│ └─lvm-swap swap 2c5f91d1-e28e-4a5d-8401-b3a41e50264c [SWAP]
└─sda3 LVM2_member 1yp2XX-gNEf-fX2B-MnH2-0SRW-hUmz-vHNLkd
#将新分区格式化为xfs格式
mkfs.xfs /dev/sda3
lvm逻辑卷扩容
#创建物理卷设备
pvcreate /dev/sda3
#查看逻辑卷组名称
vgdisplay
--- Volume group ---
VG Name lvm
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 198.99 GiB
PE Size 4.00 MiB
Total PE 50942
Alloc PE / Size 50942 / 198.99 GiB
Free PE / Size 0 / 0
VG UUID HHM6ac-0L1y-dEUY-igpA-w6Rq-Jyzz-xq6RLg
#将物理卷拓展到lvm卷组
vgextend lvm /dev/sda3
#查看逻辑卷组相信信息（空间数量和挂载路径）
vgdisplay -v
--- Volume group ---
VG Name lvm
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 198.99 GiB
PE Size 4.00 MiB
Total PE 50942
Alloc PE / Size 12543 / <49.00 GiB
Free PE / Size 38399 / <150.00 GiB #还剩空间PE数量
VG UUID HHM6ac-0L1y-dEUY-igpA-w6Rq-Jyzz-xq6RLg
--- Logical volume ---
LV Path /dev/lvm/root #挂载路径
LV Name root
VG Name lvm
LV UUID 5piXf1-3bfw-02en-mF4v-2pZf-vOag-nMcQpk
LV Write Access read/write
LV Creation host, time localhost, 2022-05-02 07:40:31 +0800
LV Status available
# open 1
LV Size <45.00 GiB
Current LE 11519
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
#逻辑卷拓展
lvextend /dev/lvm/root -rl +38399
#验证是否拓展
df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.9G 0 7.9G 0% /dev
tmpfs 7.9G 0 7.9G 0% /dev/shm
tmpfs 7.9G 12M 7.9G 1% /run
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/mapper/lvm-root 195G 1.8G 194G 1% /
/dev/sda1 1014M 137M 878M 14% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
