centos7磁盘重新分区怎么创建LVM并格式化

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1、磁盘分区，两个分两个区一个160G，一个40G

[root@MySQL innodb_log]# fdisk /dev/vdb
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/vdb: 322.1 GB, 322122547200 bytes, 629145600 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: 0x8510d8fb

Device Boot Start End Blocks Id System
/dev/vdb1 2048 209717247 104857600 83 Linux

Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2):
First sector (209717248-629145599, default 209717248):
Using default value 209717248
Last sector, +sectors or +size{K,M,G} (209717248-629145599, default 629145599): +160G
Partition 2 of type Linux and of size 160 GiB is set

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 (545261568-629145599, default 545261568):
Using default value 545261568
Last sector, +sectors or +size{K,M,G} (545261568-629145599, default 629145599):
Using default value 629145599
Partition 3 of type Linux and of size 40 GiB is set

Command (m for help): p

   Device Boot      Start         End      Blocks   Id System
/dev/vdb1            2048   209717247   104857600   83 Linux
/dev/vdb2       209717248   545261567   167772160   83 Linux
/dev/vdb3       545261568   629145599    41942016   83 Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

2、设置格式为LVM

[root@mysql innodb_log]# fdisk -l

Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x000be2dd

   Device Boot      Start         End      Blocks   Id System
/dev/vda1   *        2048     1050623      524288   83 Linux
/dev/vda2         1050624    20971519     9960448   8e Linux LVM
/dev/vda3        20971520    83886079    31457280    5 Extended
/dev/vda5        20973568    83886079    31456256   8e Linux LVM

Disk /dev/mapper/vg01-lv01: 42.4 GB, 42404413440 bytes, 82821120 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@mysql innodb_log]# fdisk /dev/vdb
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): t
Partition number (1-3, default 3): 2
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux 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'

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.

[root@mysql innodb_log]# partprobe
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.

[root@mysql innodb_log]# fdisk -l

   Device Boot      Start         End      Blocks   Id System
/dev/vdb1            2048   209717247   104857600   83 Linux
/dev/vdb2       209717248   545261567   167772160   8e Linux LVM
/dev/vdb3       545261568   629145599    41942016   8e Linux LVM

3、创建LVM

pv两个： /dev/vdb2 /dev/vdb3

vg一个对应： /dev/vdb2 /dev/vdb3

lv 一个：160G

[root@mysql innodb_log]# pvs
PV         VG   Fmt Attr PSize   PFree
/dev/vda2 vg01 lvm2 a--   <9.50g    0
/dev/vda5 vg01 lvm2 a-- <30.00g    0
[root@mysql innodb_log]# pvcreate /dev/vdb2
WARNING: ext4 signature detected on /dev/vdb2 at offset 1080. Wipe it? [y/n]: y
Wiping ext4 signature on /dev/vdb2.
Physical volume "/dev/vdb2" successfully created.
[root@mysql innodb_log]# pvcreate /dev/vdb3
Physical volume "/dev/vdb3" successfully created.
[root@mysql innodb_log]# pvs
PV         VG   Fmt Attr PSize   PFree
/dev/vda2 vg01 lvm2 a--   <9.50g      0
/dev/vda5 vg01 lvm2 a-- <30.00g      0
/dev/vdb2       lvm2 --- 160.00g 160.00g
/dev/vdb3       lvm2 --- <40.00g <40.00g
[root@mysql innodb_log]# fdisk -l

[root@mysql innodb_log]# pvs
PV         VG   Fmt Attr PSize   PFree
/dev/vda2 vg01 lvm2 a--   <9.50g      0
/dev/vda5 vg01 lvm2 a-- <30.00g      0
/dev/vdb2       lvm2 --- 160.00g 160.00g
/dev/vdb3       lvm2 --- <40.00g <40.00g
[root@mysql innodb_log]# vgcreate vgdata01 /dev/vdb2 /dev/vdb3
Volume group "vgdata01" successfully created

[root@mysql innodb_log]# vgs
VG       #PV #LV #SN Attr   VSize   VFree
vg01       2   1   0 wz--n- 39.49g      0
vgdata01   2   0   0 wz--n- 199.99g 199.99g

[root@mysql innodb_log]# lvs
LV   VG   Attr       LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv01 vg01 -wi-ao---- 39.49g
[root@mysql innodb_log]# lvcreate -L 160G -n lv02 vgdata01
Logical volume "lv02" created.
[root@mysql innodb_log]# lvs
LV   VG       Attr       LSize   Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv01 vg01     -wi-ao---- 39.49g
lv02 vgdata01 -wi-a----- 160.00g

[root@mysql innodb_log]# lvdisplay
--- Logical volume ---
LV Path                /dev/vgdata01/lv02
LV Name                lv02
VG Name                vgdata01
LV UUID                d2tSRE-tDF6-zPDV-0ACU-Qz9I-BUJJ-jPRoT1
LV Write Access        read/write
LV Creation host, time mysql.novalocal, 2020-02-26 13:11:12 +0800
LV Status              available
# open                 0
LV Size                160.00 GiB
Current LE             40960
Segments               2
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

--- Logical volume ---
LV Path                /dev/vg01/lv01
LV Name                lv01
VG Name                vg01
LV UUID                pErBl0-TR5d-xPSz-CYfY-hT3V-7FWp-QRPbAf
LV Write Access        read/write
LV Creation host, time localhost, 2019-09-16 19:31:11 +0800
LV Status              available
# open                 1
LV Size                39.49 GiB
Current LE             10110
Segments               2
Allocation             inherit
Read ahead sectors     auto
- currently set to     8192
Block device           253:0

4、格式化

[root@mysql innodb_log]# mkfs.ext4 /dev/vgdata01/lv02
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
10485760 inodes, 41943040 blocks
2097152 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2189426688
1280 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

5、写入启动文件

[root@mysql innodb_log]# df -h

Filesystem             Size Used Avail Use% Mounted on
/dev/mapper/vg01-lv01   39G 4.8G   33G 13% /
devtmpfs               7.8G     0 7.8G   0% /dev
tmpfs                  7.8G     0 7.8G   0% /dev/shm
tmpfs                  7.8G 8.7M 7.8G   1% /run
tmpfs                  7.8G     0 7.8G   0% /sys/fs/cgroup
/dev/vda1              509M 140M 370M 28% /boot
tmpfs                  1.6G     0 1.6G   0% /run/user/0
/dev/vdb1               99G 5.3G   89G   6% /data
overlay                 39G 4.8G   33G 13% /var/lib/docker/overlay2/a8b63ab12a60dbd0e16dbbd62dd4aa1d073b6092e35f95f6b59b7f0b57dd4aee/merged
[root@mysql innodb_log]# mkdir /data1
mkdir: cannot create directory ‘/data1’: File exists
[root@mysql innodb_log]# vi /etc/fstab
UUID=fa26d131-a86c-432e-9f59-091033663fdb /vdb1 ext4 defaults 0 0

#
# /etc/fstab
# Created by anaconda on Mon Sep 16 19:31:12 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg01-lv01 / ext4 defaults 1 1
UUID=9916da56-b2a1-4df1-9775-24e4103eea3a /boot xfs defaults 0 0
UUID=fa26d131-a86c-432e-9f59-091033663fdb /vdb1 ext4 defaults 0 0
/dev/vgdata01/lv02 /data1 ext4 defaults 0 0
~
~
~
~
"/etc/fstab" 12L, 503C written

6、挂载

[root@mysql innodb_log]# mount /dev/vgdata01/lv02 /data1
[root@mysql innodb_log]# df -h
Filesystem                 Size Used Avail Use% Mounted on
/dev/mapper/vg01-lv01       39G 4.8G   33G 13% /
devtmpfs                   7.8G     0 7.8G   0% /dev
tmpfs                      7.8G     0 7.8G   0% /dev/shm
tmpfs                      7.8G 8.7M 7.8G   1% /run
tmpfs                      7.8G     0 7.8G   0% /sys/fs/cgroup
/dev/vda1                  509M 140M 370M 28% /boot
tmpfs                      1.6G     0 1.6G   0% /run/user/0
/dev/vdb1                   99G 5.3G   89G   6% /data
overlay                     39G 4.8G   33G 13% /var/lib/docker/overlay2/a8b63ab12a60dbd0e16dbbd62dd4aa1d073b6092e35f95f6b59b7f0b57dd4aee/merged
/dev/mapper/vgdata01-lv02 158G   61M 150G   1% /data1
[root@mysql innodb_log]#

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