lvm을 사용하여 디스크 추가

준비물

- hdd 1T /dev/sda

- hdd 1T /dev/sdb

 

 

1. fdisk /dev/sda, fdisk /dev/sdb 명령으로 각각 파티션 생성

 

2. `pvcreate /dev/sda1`, `pvcreate /dev/sdb1` 명령으로 각각 pv 생성

[root@kube4 ~]# pvcreate /dev/sda1   Physical volume "/dev/sda1" successfully created. [root@kube4 ~]# pvcreate /dev/sdb1   Physical volume "/dev/sdb1" successfully created. [root@kube4 ~]# pvscan   PV /dev/sdc2   VG centos_cluster-test   lvm2 [<446.13 GiB / 4.00 MiB free]   PV /dev/sdb1                            lvm2 [931.51 GiB]   PV /dev/sda1                            lvm2 [931.51 GiB]   Total: 3 [<2.26 TiB] / in use: 1 [<446.13 GiB] / in no VG: 2 [<1.82 TiB]

 

3. `vgcreate centos_kube4-hdd /dev/sda1 /dev/sdb1` 명령으로 vg 생성

[root@kube4 ~]# vgcreate centos_kube4-hdd /dev/sda1 /dev/sdb1   Volume group "centos_kube4-hdd" successfully created [root@kube4 ~]# vgscan   Reading volume groups from cache.   Found volume group "centos_cluster-test" using metadata type lvm2   Found volume group "centos_kube4-hdd" using metadata type lvm2

 

4. `lvcreate -l 100%FREE -i2 -n home2 centos_kube4-hdd` 명령으로 lv 생성

- `-i2` 옵션은 스트라이프 볼륨을 생성하기 위한 옵션이다.(자세한 내용은 여기 참조)

- `-i2` 옵션의 값은 최대 물리 디스크의 개수를 넘을 수 없다.

[root@kube4 /]# lvcreate -l 100%FREE -i2 -n home2 centos_kube4-hdd   Using default stripesize 64.00 KiB.  Using default stripesize 64.00 KiB.   Logical volume "home2" created. [root@kube4 /]# lvdisplay /dev/centos_kube4-hdd/home2   --- Logical volume ---   LV Path                /dev/centos_kube4-hdd/home2   LV Name                home2   VG Name                centos_kube4-hdd   LV UUID                PBKy9d-7A19-uXU3-Lero-ncZm-prST-RfUHN6   LV Write Access        read/write   LV Creation host, time kube4, 2019-08-12 15:45:55 +0900   LV Status              available   # open                 0   LV Size                <1.82 TiB   Current LE             476932   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     512   Block device           253:2

 

5. `mkfs.xfs /dev/centos_kube4-hdd/home2` 명령으로 fs 지정 및 포멧

[root@kube4 /]# mkfs.xfs /dev/centos_kube4-hdd/home2 meta-data=/dev/centos_kube4-hdd/home2 isize=512    agcount=32, agsize=15261808 blks               =                       sectsz=4096  attr=2, projid32bit=1               =                       crc=1        finobt=0, sparse=0 data       =                       bsize=4096   blocks=488377856, imaxpct=5               =                       sunit=16     swidth=32 blks naming   =version 2        bsize=4096   ascii-ci=0 ftype=1 log          =internal log     bsize=4096   blocks=238465, version=2                =                       sectsz=4096  sunit=1 blks, lazy-count=1 realtime  =none               extsz=4096   blocks=0, rtextents=0

 

6. `mount /dev/centos_kube4-hdd/home2 /home2` 명령으로 /home2에 마운트

 

7. 추가

- lvremove(요기 참조)

[root@kube4 /]# lvremove /dev/centos_kube4-hdd/home2 Do you really want to remove active logical volume centos_kube4-hdd/home2? [y/n]: y   Logical volume "home2" successfully removed