源文档地址:https://www.2daygeek.com/create-lvm-storage-logical-volume-manager-in-linux/

?

1. 创建PV

创建前/dev/sdb不能分区,如果已经分区,使用fdisk /dev/sdb 删除分区

    [root@O-Friday ~]# pvcreate /dev/sdb /dev/sdc
    WARNING: dos signature detected on /dev/sdb at offset 510. Wipe it? [y/n]: y
      Wiping dos signature on /dev/sdb.
    WARNING: dos signature detected on /dev/sdc at offset 510. Wipe it? [y/n]: y
      Wiping dos signature on /dev/sdc.
      Physical volume "/dev/sdb" successfully created.
      Physical volume "/dev/sdc" successfully created.
    [root@O-Friday ~]# pvdisplay
      --- Physical volume ---
      PV Name               /dev/sda2
      VG Name               openeuler
      PV Size               <98.00 GiB / not usable 3.00 MiB
      Allocatable           yes (but full)
      PE Size               4.00 MiB
      Total PE              25087
      Free PE               0
      Allocated PE          25087
      PV UUID               Yv3d0c-OjcH-8s93-MsfZ-1JUu-XwU3-NYyPYD
    
      "/dev/sdb" is a new physical volume of "10.00 GiB"
      --- NEW Physical volume ---
      PV Name               /dev/sdb
      VG Name
      PV Size               10.00 GiB
      Allocatable           NO
      PE Size               0
      Total PE              0
      Free PE               0
      Allocated PE          0
      PV UUID               AxdYk0-Giiv-kF4Z-QOIj-yA6j-Rsf0-BI7S2o
    
      "/dev/sdc" is a new physical volume of "10.00 GiB"
      --- NEW Physical volume ---
      PV Name               /dev/sdc
      VG Name
      PV Size               10.00 GiB
      Allocatable           NO
      PE Size               0
      Total PE              0
      Free PE               0
      Allocated PE          0
      PV UUID               Nz06rK-h4FH-Jy2v-hXuE-hiws-6SRW-PSMQez

2. 创建VG

vgname = openeuler是系统安装时自动创建

    [root@O-Friday ~]# vgcreate vg01 /dev/sdb /dev/sdc
      Volume group "vg01" successfully created
    [root@O-Friday ~]# vgdisplay
      --- Volume group ---
      VG Name               vg01
      System ID
      Format                lvm2
      Metadata Areas        2
      Metadata Sequence No  1
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                0
      Open LV               0
      Max PV                0
      Cur PV                2
      Act PV                2
      VG Size               19.99 GiB
      PE Size               4.00 MiB
      Total PE              5118
      Alloc PE / Size       0 / 0
      Free  PE / Size       5118 / 19.99 GiB
      VG UUID               oAbeGg-j8U2-kCuO-tcmW-HQWv-MqbT-kQdipr
    
      --- Volume group ---
      VG Name               openeuler
      System ID
      Format                lvm2
      Metadata Areas        1
      Metadata Sequence No  3
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                2
      Open LV               2
      Max PV                0
      Cur PV                1
      Act PV                1
      VG Size               <98.00 GiB
      PE Size               4.00 MiB
      Total PE              25087
      Alloc PE / Size       25087 / <98.00 GiB
      Free  PE / Size       0 / 0
      VG UUID               I7kRIn-4XeX-0agf-OxRq-ehSi-hqJf-nvkmtU
    

3. 查看vg

    [root@O-Friday ~]# vgs vg01
      VG   #PV #LV #SN Attr   VSize  VFree
      vg01   2   0   0 wz--n- 19.99g 19.99g

4. 扩展VG

    [root@O-Friday ~]# vgextend vg01 /dev/sdd
    WARNING: dos signature detected on /dev/sdd at offset 510. Wipe it? [y/n]: y
      Wiping dos signature on /dev/sdd.
      Physical volume "/dev/sdd" successfully created.
      Volume group "vg01" successfully extended
    

5. 创建LV

/swap 与 /root为安装系统时自动创建

    [root@O-Friday ~]# lvcreate -n lv001 -L 15G vg01
      Logical volume "lv001" created.
    [root@O-Friday ~]# lvdisplay
      --- Logical volume ---
      LV Path                /dev/vg01/lv001
      LV Name                lv001
      VG Name                vg01
      LV UUID                0TdOKB-PDI3-LWDv-X2nb-lBVV-kfLJ-jVOVBy
      LV Write Access        read/write
      LV Creation host, time O-Friday, 2023-03-15 14:24:07 +0800
      LV Status              available
      # open                 0
      LV Size                15.00 GiB
      Current LE             3840
      Segments               2
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:2
    
      --- Logical volume ---
      LV Path                /dev/openeuler/swap
      LV Name                swap
      VG Name                openeuler
      LV UUID                xNBLth-zrQf-HY8L-fSrA-jrrU-qERF-xfDafa
      LV Write Access        read/write
      LV Creation host, time O-Friday, 2023-03-05 10:52:53 +0800
      LV Status              available
      # open                 2
      LV Size                6.00 GiB
      Current LE             1536
      Segments               1
      Allocation             inherit
      Read ahead