一.使用背景
二.使用方法
1.查看卷组名称及卷组使⽤情况
[root@localhost ~]# vgdisplay
File descriptor 3 (socket:[6108435]) leaked on vgdisplay invocation. Parent PID 28026: -bash
--- Volume group ---
VG Name centos
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 48.99 GiB
PE Size 4.00 MiB
Total PE 12542
Alloc PE / Size 12542 / 48.99 GiB
Free PE / Size 0 / 0
VG UUID 9Ly7Rg-wz0Y-eFSh-0KIn-dX49-C1g1-Dw32rd2 查看当前逻辑卷的空间状态
lvdisplay
[root@localhost ~]# lvdisplay
File descriptor 3 (socket:[6108435]) leaked on lvdisplay invocation. Parent PID 28026: -bash
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID YdCZkD-AdpY-h5vV-3cPg-6U4v-QDRY-fAIc1k
LV Write Access read/write
LV Creation host, time localhost, 2020-05-19 13:58:04 +0800
LV Status available
# open 2
LV Size 1.00 GiB
Current LE 256
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID GF6WxC-kJdq-ttUH-CO0L-8pZM-j6Qs-HeeXhR
LV Write Access read/write
LV Creation host, time localhost, 2020-05-19 13:58:04 +0800
LV Status available
# open 1
LV Size 47.99 GiB
Current LE 12286
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:03 查看新挂载的磁盘
[root@cosmo-buckup02 ~]# fdisk -l
Disk /dev/vda: 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: 0x000a76b7
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 2099199 1048576 83 Linux
/dev/vda2 2099200 20971519 9436160 8e Linux LVM
Disk /dev/vdb: 67 MB, 67108864 bytes, 131072 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: 0x951c984e
Device Boot Start End Blocks Id System
/dev/vdb1 2048 131071 64512 7 HPFS/NTFS/exFAT
Disk /dev/mapper/centos-root: 8585 MB, 8585740288 bytes, 16769024 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: 1073 MB, 1073741824 bytes, 2097152 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
4.格式化分区
fdisk /dev/vda
[root@cosmo-buckup02 ~]# fdisk /dev/vda
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): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (3,4, default 3): 3
First sector (20971520-838860799, default 20971520):
Using default value 20971520
Last sector, +sectors or +size{K,M,G} (20971520-838860799, default 838860799):
Using default value 838860799
Partition 3 of type Linux and of size 390 GiB is set
Command (m for help): t
Partition number (1-3, default 3):
Hex code (type L to list all codes): l
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt
9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
1e Hidden W95 FAT1 80 Old Minix
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to '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.
5 查看
lsblk
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 80G 0 disk
vda1 252:1 0 1G 0 part /boot
vda2 252:2 0 9G 0 part
centos-root 253:0 0 48G 0 lvm /
centos-swap 253:1 0 1G 0 lvm [SWAP]
vdb 252:16 0 64M 0 disk
vdb1 252:17 0 63M 0 part
vdc 252:32 0 40G 0 disk
vdc1 252:33 0 40G 0 part
centos-root 253:0 0 48G 0 lvm /
vdd 252:48 0 40G 0 disk
vdd1 252:49 0 40G 0 part6.命令是通知操作系统分区表的更改，当执行完该命令后再做创建PV卷的操作，则正常执行：
[root@localhost ~]#partprobe /dev/vda
[root@localhost ~]#7.将新加的分区/dev/vdd1创建为物理卷
[root@localhost ~]# pvcreate /dev/vda3
File descriptor 3 (socket:[6108435]) leaked on pvcreate invocation. Parent PID 28026: -bash
Physical volume "/dev/vda3" successfully created.8.给卷组 centos-root 扩容，将物理卷 /dev/vdd1 扩展至 centos-root 卷组
[root@localhost ~]# vgextend centos /dev/vda3
File descriptor 3 (socket:[6226904]) leaked on vgextend invocation. Parent PID 58233: -bash
Volume group "centos" successfully extended9.将全部空间扩展至/dev/mapper/centos-root
[root@localhost ~]# lvextend -l +100%FREE /dev/mapper/centos-root
File descriptor 3 (socket:[6226904]) leaked on lvextend invocation. Parent PID 58233: -bash
Size of logical volume centos/root changed from 47.99 GiB (12286 extents) to <87.99 GiB (22525 extents).
Logical volume centos/root successfully resized.10.写入文件系统，使扩容生效 xfs_growfs /dev/mapper/centos-root ；
如果是ext4文件系统，命令为 resize2fs /dev/mapper/centos-rootxfs_growfs /dev/mapper/centos-root resize2fs /dev/mapper/centos-root
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=25, agsize=524032 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=12580864, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 12580864 to 2306560011 查看结果
df -h
lsblk
Comments | NOTHING