[系统运维]LVM逻辑卷管理 创建 ext4 xfs文件系统扩容

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环境：vmware
system： rhel8.4

创建逻辑卷

创建新分区:

yum -y install gdisk
[root@serverb ~]# gdisk /dev/vdb 
GPT fdisk (gdisk) version 1.0.3

Partition table scan:
  MBR: not present
  BSD: not present
  APM: not present
  GPT: not present

Creating new GPT entries.

Command (? for help): n
Partition number (1-128, default 1): 
First sector (34-10485726, default = 2048) or {+-}size{KMGTP}: 
Last sector (2048-10485726, default = 10485726) or {+-}size{KMGTP}: +1G
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 8e00
Changed type of partition to 'Linux LVM'

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/vdb.
The operation has completed successfully

创建物理卷

pvcreate  /dev/vdb1
  Physical volume "/dev/vdb1" successfully created.
[root@serverb ~]# pvs
  PV         VG Fmt  Attr PSize PFree
  /dev/vdb1     lvm2 ---  1.00g 1.00g

创建卷组

 vgcreate vg1 /dev/vdb1 
  Volume group "vg1" successfully created
[root@serverb ~]# vgs
  VG  #PV #LV #SN Attr   VSize    VFree   
  vg1   1   0   0 wz--n- 1020.00m 1020.00m

创建逻辑卷

[root@serverb ~]# lvcreate -n lv1 -L 500M vg1 
  Logical volume "lv1" created.
[root@serverb ~]# 
[root@serverb ~]# 
[root@serverb ~]# 
[root@serverb ~]# lvs
  LV   VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-a----- 500.00m

格式化为ext4 或者xfs

mkfs.ext4|xfs /dev/mapper/vg1-lv1

创建挂载点并挂载

mkdir /mnt/lv1
mount /dev/mapper/vg1-lv1  /mnt/lv1/

df -Th |grep /mnt/lv1
/dev/mapper/vg1-lv1 ext4      477M  2.3M  445M   1% /mnt/lv1

ext4文件系统逻辑卷扩容

将一块新的磁盘配置为物理卷 并加入卷组

pvcreate  /dev/vdc
  Physical volume "/dev/vdc" successfully created.
[root@serverb ~]# vgextend vg1 /dev/vdc
  Volume group "vg1" successfully extended
[root@serverb ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   1   0 wz--n- 5.99g 5.50g

扩容逻辑卷分区

lvextend -L +5G /dev/vg1/lv1 
  Size of logical volume vg1/lv1 changed from 500.00 MiB (125 extents) to <5.49 GiB (1405 extents).
  Logical volume vg1/lv1 successfully resized.
[root@serverb ~]# lvs
  LV   VG  Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-a----- <5.49g      

使用resize2fs刷新文件系统

resize2fs -f /dev/mapper/
control  vg1-lv1  
[root@serverb ~]# resize2fs -f /dev/mapper/vg1-lv1 
resize2fs 1.45.4 (23-Sep-2019)
Resizing the filesystem on /dev/mapper/vg1-lv1 to 5754880 (1k) blocks.
The filesystem on /dev/mapper/vg1-lv1 is now 5754880 (1k) blocks long.

挂载查看容量

!mount
mount /dev/mapper/vg1-lv1  /mnt/lv1/
[root@serverb ~]# !df
df -Th |grep /mnt/lv1
/dev/mapper/vg1-lv1 ext4      5.4G  3.0M  5.1G   1% /mnt/lv1

xfs文件系统逻辑卷扩容

将一块新的磁盘配置为物理卷 并加入卷组

pvcreate  /dev/vdd
  Physical volume "/dev/vdd" successfully created.
[root@serverb ~]# 
[root@serverb ~]# 
[root@serverb ~]# vgextend  vg1 /dev/vdd
  Volume group "vg1" successfully extended
[root@serverb ~]# vgs
  VG  #PV #LV #SN Attr   VSize   VFree
  vg1   3   1   0 wz--n- <10.99g 5.50g

扩容逻辑卷分区

  lvextend -L +5G /dev/vg1/lv1 
  Size of logical volume vg1/lv1 changed from <5.49 GiB (1405 extents) to <10.49 GiB (2685 extents).
  Logical volume vg1/lv1 successfully resized.

使用xfs_growfs命令刷新文件系统并挂载

xfs_growfs  /dev/mapper/vg1-lv1 
xfs_growfs: /dev/mapper/vg1-lv1 is not a mounted XFS filesystem
[root@serverb ~]# 
[root@serverb ~]# mount /dev/m
mapper/           mcelog            mem               memory_bandwidth  mqueue/
[root@serverb ~]# mount /dev/mapper/vg1-lv1 /mnt/lv1/

df -Th |grep  /mnt/lv1
/dev/mapper/vg1-lv1 xfs       5.5G   72M  5.5G   2% /mnt/lv1