Linux7.x LVM 생성

* 하드디스크 추가 : /dev/sdb (VDI-동적할당-5GB)

 

 

1. 디스크 확인

[root@OL7 ~]# fdisk -l
Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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/sda: 85.9 GB, 85899345920 bytes, 167772160 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: 0x000def44

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   167772159    82836480   8e  Linux LVM

 

2. 파티션 생성

[root@OL7 ~]# fdisk /dev/sdb
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.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x9340762e.
Command (m for help): n  -------> #파티션 생성
Partition type:   --------> #1~3번은 p 타입, 4번은 e타입, 5번이후부터는 logical 파티션생성
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):  -------> #primary 파티션 생성
Using default response p
Partition number (1-4, default 1): -------> #첫번째/엔터입력
First sector (2048-10485759, default 2048): -------> #디폴트 2048섹터 시작/엔터 입력
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-10485759, default 10485759): +1G ----->#1기가 추가
Partition 1 of type Linux and of size 1 GiB is set

Command (m for help): t  -------> #파티션 타입 설정
Selected partition 1
Hex code (type L to list all codes): 8e  -------> #파티션 타입 코드
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p  -------> #파티션 확인

Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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: 0x556b35f7

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048     2099199     1048576   8e  Linux LVM

Command (m for help): w -------> 설정 저장
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

 

3. 생성된 파티션 확인

[root@OL7 ~]# fdisk -l

Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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: 0x556b35f7

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048     2099199     1048576   8e  Linux LVM

Disk /dev/sda: 85.9 GB, 85899345920 bytes, 167772160 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: 0x000def44

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   167772159    82836480   8e  Linux LVM

 

4. PV, VG, LV 항목 설정 상태 확인

[root@OL7 ~]# pvscan
  PV /dev/sda2   VG ol              lvm2 [<79.00 GiB / 0    free]
  Total: 1 [<79.00 GiB] / in use: 1 [<79.00 GiB] / in no VG: 0 [0   ]
  
[root@OL7 ~]# vgscan
  Reading volume groups from cache.
  Found volume group "ol" using metadata type lvm2
  
[root@OL7 ~]# lvscan
  ACTIVE            '/dev/ol/swap' [4.00 GiB] inherit
  ACTIVE            '/dev/ol/root' [<75.00 GiB] inherit

 

5. PV 생성

[root@OL7 ~]# pvcreate /dev/sdb1
  Physical volume "/dev/sdb1" successfully created.
  
[root@OL7 ~]# pvs
  PV         VG Fmt  Attr PSize   PFree
  /dev/sda2  ol lvm2 a--  <79.00g    0
  /dev/sdb1     lvm2 ---    1.00g 1.00g
  
[root@OL7 ~]# pvscan
  PV /dev/sda2   VG ol              lvm2 [<79.00 GiB / 0    free]
  PV /dev/sdb1                      lvm2 [1.00 GiB]
  Total: 2 [<80.00 GiB] / in use: 1 [<79.00 GiB] / in no VG: 1 [1.00 GiB]

 

6. VG 생성

[root@OL7 ~]# vgcreate data_vg01 /dev/sdb1
  Volume group "data_vg01" successfully created
  
[root@OL7 ~]# vgs
  VG        #PV #LV #SN Attr   VSize    VFree
  data_vg01   1   0   0 wz--n- 1020.00m 1020.00m
  ol          1   2   0 wz--n-  <79.00g       0

[root@OL7 ~]# vgscan
  Reading volume groups from cache.
  Found volume group "data_vg01" using metadata type lvm2
  Found volume group "ol" using metadata type lvm2

 

7. LV생성

[root@OL7 ~]# lvcreate -l 100%FREE -n data_lv01 data_vg01
  Logical volume "data_lv01" created.
  
[root@OL7 ~]# lvs
  LV        VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  data_lv01 data_vg01 -wi-a----- 1020.00m
  root      ol        -wi-ao----  <75.00g
  swap      ol        -wi-ao----    4.00g
  
[root@OL7 ~]# lvscan
  ACTIVE            '/dev/data_vg01/data_lv01' [1020.00 MiB] inherit
  ACTIVE            '/dev/ol/swap' [4.00 GiB] inherit
  ACTIVE            '/dev/ol/root' [<75.00 GiB] inherit

 

8. 파일시스템 생성 

[root@OL7 ~]# mkfs -t xfs /dev/data_vg01/data_lv01
meta-data=/dev/data_vg01/data_lv01 isize=256    agcount=4, agsize=65280 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0, sparse=0, rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=261120, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
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

 

9. 파일시스템 마운트

[root@OL7 ~]# mkdir /test_data

[root@OL7 ~]# mount /dev/data_vg01/data_lv01 /test_data/

[root@OL7 ~]# df -Th
Filesystem                      Type      Size  Used Avail Use% Mounted on
devtmpfs                        devtmpfs  968M     0  968M   0% /dev
tmpfs                           tmpfs     987M     0  987M   0% /dev/shm
tmpfs                           tmpfs     987M  9.5M  978M   1% /run
tmpfs                           tmpfs     987M     0  987M   0% /sys/fs/cgroup
/dev/mapper/ol-root             xfs        75G   24G   52G  32% /
/dev/sda1                       xfs      1014M  274M  741M  27% /boot
tmpfs                           tmpfs     198M   32K  198M   1% /run/user/0
/dev/mapper/data_vg01-data_lv01 xfs      1017M   33M  985M   4% /test_data

 

10. OS재부팅 후에도 자동 마운트 작업 -> 마지막 줄 추가

[root@OL7 ~]# vi /etc/fstab

[root@OL7 ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Fri Apr 15 12:35:47 2022
#
# 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/ol-root     /                       xfs     defaults        0 0
UUID=04ca2dd8-ac08-4e08-96c6-61d0100670da /boot                   xfs     defaults        0 0
/dev/mapper/ol-swap     swap                    swap    defaults        0 0
/dev/data_vg01/data_lv01     /test_dir                    xfs    defaults        0 0