lvm扩容创建的基本步骤

lvm扩容创建的基本步骤(3)

时间：2024-01-19 13:40:21 来源：IT袋作者：马勇

导读：lvm扩容创建的基本步骤，将刚才初始化的物理卷添加到主分区的物理卷：vgextend centos(vg name ) /dev/sda3，添加后查看vgdisplay，可以看到Free 可分配容量有了19G [root@Z ~]# vgextend centos /d

lvm扩容创建的基本步骤

将刚才初始化的物理卷添加到主分区的物理卷：vgextend centos(vg name ) /dev/sda3，添加后查看vgdisplay，可以看到Free 可分配容量有了19G

[root@Z ~]# vgextend centos /dev/sda3
  Volume group "centos" successfully extended
  
[root@Z ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               57.99 GiB
  PE Size               4.00 MiB
  Total PE              14846
  Alloc PE / Size       9982 / 38.99 GiB
  Free  PE / Size       4864 / 19.00 GiB
  VG UUID               hTO0Fm-c4q8-yboo-cSig-XLcK-CXo7-JoTInz

查看逻辑卷LVM信息： lvdisplay，主要看 LV Path ，LV Size

[root@Z ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                vfUMhU-5XVp-s4uB-lVs3-436b-29Vh-StDsYb
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-03-30 16:58:54 +0800
  LV Status              available
  # open                 2
  LV Size                <3.88 GiB
  Current LE             992
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1
   
--- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                4KsFu6-jk8H-WsUa-1RVM-2DUq-gyPE-Nb6Rcx
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-03-30 16:58:54 +0800
  LV Status              available
  # open                 1
  LV Size                <35.12 GiB
  Current LE             8990
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0

使用lvextend命令扩容分区： lvextend -l +4864 /dev/centos/root，扩容完lvdisplay查看 LV size 大小 4864是：Free PE的id号，通过vgdisplay命令查看 /dev/centos/root是：LV path，通过lvdisplay 命令查看

[root@Z ~]# lvextend -l +4864 /dev/centos/root
  Size of logical volume centos/root changed from <35.12 GiB (8990 extents) to <54.12 GiB (13854 extents).
  Logical volume centos/root successfully resized.
[root@Z ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                vfUMhU-5XVp-s4uB-lVs3-436b-29Vh-StDsYb
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-03-30 16:58:54 +0800
  LV Status              available
  # open                 2
  LV Size                <3.88 GiB
  Current LE             992
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1
   
  --- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                4KsFu6-jk8H-WsUa-1RVM-2DUq-gyPE-Nb6Rcx
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-03-30 16:58:54 +0800
  LV Status              available
  # open                 1
  LV Size                <54.12 GiB
  Current LE             13854
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0