分别从横向和纵向两种方法扩充lvs空间

yunson_Liu2025-12-24 9:38

1、查看lvs信息

bash 复制代码 
[root@ip-172-31-26-146 ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                     4.0M     0  4.0M   0% /dev
tmpfs                        3.9G  4.0K  3.9G   1% /dev/shm
tmpfs                        1.6G  632K  1.6G   1% /run
/dev/nvme0n1p1                40G   11G   30G  26% /
tmpfs                        3.9G     0  3.9G   0% /tmp
/dev/nvme0n1p128              10M  1.3M  8.7M  13% /boot/efi
overlay                       40G   11G   30G  26% /var/lib/docker/overlay2/84699b7470c48b0c4a1cb8b91b868be21f96c388de173f25df9ac741be7d0d0e/merged
tmpfs                        782M     0  782M   0% /run/user/1000
/dev/mapper/vg_data-lv_data   30G  247M   30G   1% /data/lvs
[root@ip-172-31-26-146 ~]# lvs
  LV      VG      Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_data vg_data -wi-ao---- <29.99g                                                    
[root@ip-172-31-26-146 ~]# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg_data/lv_data
  LV Name                lv_data
  VG Name                vg_data
  LV UUID                aoI2fv-LoQS-duKk-t567-JW4f-fF6j-4lyV5x
  LV Write Access        read/write
  LV Creation host, time ip-172-31-26-146.us-east-2.compute.internal, 2025-12-23 03:14:56 +0000
  LV Status              available
  # open                 1
  LV Size                <29.99 GiB
  Current LE             7677
  Segments               3
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

2、纵向扩充lvs空间(将组成lvs的所有的pv都扩充同等的大小5G)

1）查看现有pv

bash 复制代码 
[root@ip-172-31-26-146 ~]# lsblk
NAME              MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
nvme0n1           259:0    0  40G  0 disk 
├─nvme0n1p1       259:1    0  40G  0 part /
├─nvme0n1p127     259:2    0   1M  0 part 
└─nvme0n1p128     259:3    0  10M  0 part /boot/efi
nvme1n1           259:4    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  30G  0 lvm  /data/lvs
nvme2n1           259:5    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  30G  0 lvm  /data/lvs
nvme3n1           259:6    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  30G  0 lvm  /data/lvs

2）扩展物理卷pv

bash 复制代码 
[root@ip-172-31-26-146 ~]# pvs
  PV         VG      Fmt  Attr PSize   PFree
  /dev/sdb   vg_data lvm2 a--  <10.00g    0 
  /dev/sdc   vg_data lvm2 a--  <10.00g    0 
  /dev/sdd   vg_data lvm2 a--  <10.00g    0 
[root@ip-172-31-26-146 ~]# pvresize /dev/sdb 
  Physical volume "/dev/sdb" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
[root@ip-172-31-26-146 ~]# pvresize /dev/sdc
  Physical volume "/dev/sdc" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
[root@ip-172-31-26-146 ~]# pvresize /dev/sdd
  Physical volume "/dev/sdd" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
[root@ip-172-31-26-146 ~]# pvs
  PV         VG      Fmt  Attr PSize   PFree
  /dev/sdb   vg_data lvm2 a--  <15.00g 5.00g
  /dev/sdc   vg_data lvm2 a--  <15.00g 5.00g
  /dev/sdd   vg_data lvm2 a--  <15.00g 5.00g

3）扩展逻辑卷lvs

指定扩充

lvcreate -n lv_data -L 40G vg_data

bash 复制代码 
[root@ip-172-31-26-146 ~]# lvextend -l +100%FREE /dev/vg_data/lv_data
  Size of logical volume vg_data/lv_data changed from <29.99 GiB (7677 extents) to <44.99 GiB (11517 extents).
  Logical volume vg_data/lv_data successfully resized.
[root@ip-172-31-26-146 ~]# lvs
  LV      VG      Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_data vg_data -wi-ao---- <44.99g                                                    
[root@ip-172-31-26-146 ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                     4.0M     0  4.0M   0% /dev
tmpfs                        3.9G  4.0K  3.9G   1% /dev/shm
tmpfs                        1.6G  632K  1.6G   1% /run
/dev/nvme0n1p1                40G   11G   30G  26% /
tmpfs                        3.9G     0  3.9G   0% /tmp
/dev/nvme0n1p128              10M  1.3M  8.7M  13% /boot/efi
overlay                       40G   11G   30G  26% /var/lib/docker/overlay2/84699b7470c48b0c4a1cb8b91b868be21f96c388de173f25df9ac741be7d0d0e/merged
tmpfs                        782M     0  782M   0% /run/user/1000
/dev/mapper/vg_data-lv_data   30G  247M   30G   1% /data/lvs

刷新逻辑卷空间大小

ext4格式的刷新命令 resize2fs /dev/vg_data/lv_data

bash 复制代码 
[root@ip-172-31-26-146 ~]# xfs_growfs /data/lvs/
meta-data=/dev/mapper/vg_data-lv_data isize=512    agcount=16, agsize=491328 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=1 inobtcount=1
data     =                       bsize=4096   blocks=7861248, imaxpct=25
         =                       sunit=1      swidth=1 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=16384, version=2
         =                       sectsz=512   sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 7861248 to 11793408
[root@ip-172-31-26-146 ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                     4.0M     0  4.0M   0% /dev
tmpfs                        3.9G  4.0K  3.9G   1% /dev/shm
tmpfs                        1.6G  632K  1.6G   1% /run
/dev/nvme0n1p1                40G   11G   30G  26% /
tmpfs                        3.9G     0  3.9G   0% /tmp
/dev/nvme0n1p128              10M  1.3M  8.7M  13% /boot/efi
overlay                       40G   11G   30G  26% /var/lib/docker/overlay2/84699b7470c48b0c4a1cb8b91b868be21f96c388de173f25df9ac741be7d0d0e/merged
tmpfs                        782M     0  782M   0% /run/user/1000
/dev/mapper/vg_data-lv_data   45G  355M   45G   1% /data/lvs

3、横向扩充lvs空间(在新增一块同等大小的硬盘15G)

1）查看现有pv的大小，并创建一块同等大小的硬盘

bash 复制代码 
[root@ip-172-31-26-146 ~]# lsblk
NAME              MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
nvme0n1           259:0    0  40G  0 disk 
├─nvme0n1p1       259:1    0  40G  0 part /
├─nvme0n1p127     259:2    0   1M  0 part 
└─nvme0n1p128     259:3    0  10M  0 part /boot/efi
nvme1n1           259:4    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  45G  0 lvm  /data/lvs
nvme2n1           259:5    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  45G  0 lvm  /data/lvs
nvme3n1           259:6    0  15G  0 disk 
└─vg_data-lv_data 253:0    0  45G  0 lvm  /data/lvs
nvme4n1           259:7    0  15G  0 disk

2）将新增硬盘创建新的pv

bash 复制代码 
[root@ip-172-31-26-146 ~]# pvcreate /dev/nvme4n1 
  Physical volume "/dev/nvme4n1" successfully created.
[root@ip-172-31-26-146 ~]# pvs
  PV         VG      Fmt  Attr PSize   PFree 
  /dev/sdb   vg_data lvm2 a--  <15.00g     0 
  /dev/sdc   vg_data lvm2 a--  <15.00g     0 
  /dev/sdd   vg_data lvm2 a--  <15.00g     0 
  /dev/sde           lvm2 ---   15.00g 15.00g

3）将新创建的pv扩展到需要扩展的vg

bash 复制代码 
[root@ip-172-31-26-146 ~]# vgextend vg_data /dev/sde 
  Volume group "vg_data" successfully extended
[root@ip-172-31-26-146 ~]# vgs
  VG      #PV #LV #SN Attr   VSize  VFree  
  vg_data   4   1   0 wz--n- 59.98g <15.00g

3）将vg所有free的大小都扩展到lv

bash 复制代码 
[root@ip-172-31-26-146 ~]# lvextend -l +100%FREE /dev/vg_data/lv_data
  Size of logical volume vg_data/lv_data changed from <44.99 GiB (11517 extents) to 59.98 GiB (15356 extents).
  Logical volume vg_data/lv_data successfully resized.
[root@ip-172-31-26-146 ~]# lvs
  LV      VG      Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_data vg_data -wi-ao---- 59.98g

4）查看现有lvs挂载的空间大小，并刷新盘符大小

bash 复制代码 
[root@ip-172-31-26-146 ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
。。。。
/dev/mapper/vg_data-lv_data   45G  355M   45G   1% /data/lvs
[root@ip-172-31-26-146 ~]# xfs_growfs /data/lvs/
meta-data=/dev/mapper/vg_data-lv_data isize=512    agcount=25, agsize=491328 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=1 inobtcount=1
data     =                       bsize=4096   blocks=11793408, imaxpct=25
         =                       sunit=1      swidth=1 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=16384, version=2
         =                       sectsz=512   sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 11793408 to 15724544
[root@ip-172-31-26-146 ~]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
。。。。
/dev/mapper/vg_data-lv_data   60G  462M   60G   1% /data/lvs
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