创建逻辑卷

橡皮草帽

1.创建一个分区
[root@desktop ~]# 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: 21.5 GB, 21474836480 bytes, 41943040 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: 0x000bffad
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048    20482047    10240000   83  Linux
/dev/sda2        20482048    24578047     2048000   82  Linux swap / Solaris
/dev/sda3        24578048    25602047      512000   83  Linux
/dev/sda4        25602048    41943039     8170496    5  Extended
/dev/sda5        25604096    26652671      524288   82  Linux swap / Solaris
Command (m for help): n
All primary partitions are in use
Adding logical partition 6
First sector (26654720-41943039, default 26654720):
Using default value 26654720
Last sector, +sectors or +size{K,M,G} (26654720-41943039, default 41943039):
Using default value 41943039
Partition 6 of type Linux and of size 7.3 GiB is set
Command (m for help): t
Partition number (1-6, default 6):
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: 21.5 GB, 21474836480 bytes, 41943040 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: 0x000bffad
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048    20482047    10240000   83  Linux
/dev/sda2        20482048    24578047     2048000   82  Linux swap / Solaris
/dev/sda3        24578048    25602047      512000   83  Linux
/dev/sda4        25602048    41943039     8170496    5  Extended
/dev/sda5        25604096    26652671      524288   82  Linux swap / Solaris
/dev/sda6        26654720    41943039     7644160   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.
[root@desktop ~]# partprobe


2.创建卷组
[root@desktop ~]# pvcreate /dev/sda6 --初始化物理磁盘为物理卷
  Physical volume "/dev/sda6" successfully created
[root@desktop ~]# vgcreate -s 16M datastore /dev/sda6 --创建卷组
  Volume group "datastore" successfully created
[root@desktop ~]# lvcreate -n database -l 50 datastore --创建逻辑卷
  Logical volume "database" created.
[root@desktop ~]# lvs --查看逻辑卷
  LV       VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  database datastore -wi-a----- 800.00m                                                   
  lv0      vg0       -wi-ao---- 292.00m                                                   
[root@desktop ~]# lvdisplay /dev/datastore/database  --查看具体信息
  --- Logical volume ---
  LV Path                /dev/datastore/database
  LV Name                database
  VG Name                datastore
  LV UUID                azoohK-KU5J-fkDa-9PjD-1ugH-bzWh-SevknL
  LV Write Access        read/write
  LV Creation host, time desktop.group8.example.com, 2019-11-24 18:40:28 +0800
  LV Status              available
  # open                 0
  LV Size                800.00 MiB
  Current LE             50
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1

3.格式化xfs格式
[root@desktop ~]# mkfs.xfs /dev/datastore/database
meta-data=/dev/datastore/database isize=256    agcount=4, agsize=51200 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=204800, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal log           bsize=4096   blocks=853, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

4.blkid查看uuid，然后编辑/etc/fstab文件，永久挂载
[root@desktop ~]# blkid --查看UUID
/dev/sda1: UUID="3c6e20fa-3e12-42ca-8dba-b12eee74e43e" TYPE="xfs"
/dev/sda2: UUID="ff7d2e6d-c2d7-46a0-af09-70c85898ab46" TYPE="swap"
/dev/sda3: UUID="4Ntfep-th0e-bCXr-Qo3b-EPJ1-SRsu-nfeOru" TYPE="LVM2_member"
/dev/sda5: UUID="8a529678-5180-4c8c-bd2c-18677c573ba3" TYPE="swap"
/dev/mapper/vg0-lv0: UUID="b2285e5e-de78-4392-945a-817843fd7f10" TYPE="ext3"
/dev/sda6: UUID="W5FA8A-t3Jr-3qTP-FcdE-xBXt-MThN-nBNFOy" TYPE="LVM2_member"
/dev/mapper/datastore-database: UUID="880f944b-ed94-489a-8480-7cfb321b20b9" TYPE="xfs"
[root@desktop ~]# vim /etc/fstab --编辑文件
[root@desktop ~]# mount -a --重新挂载