Linux服务器目录扩容问题

Question

问题遇到的现象和发生背景

我有1台Linux服务器，现在我想把/home目录扩容，请问需要怎么做呢？

操作环境、软件版本等信息

操作系统版本：红帽 7.9
文件系统类型：xfs

我想要达到的结果

现在我想把/home目录扩容，请问需要怎么做呢？请简述步骤，最好把相关命令贴出来，谢谢。

Answer 1

1.查看所有DISK，最后一个可能为新加的磁盘

fdisk -l
Disk /dev/sdb: 53.7 GB, 53687091200 bytes 64 heads, 32 sectors/track, 51200 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

1. 扩pv

   pvcreate /dev/sdb
   Physical volume "/dev/sdb" successfully created
   

2. 查看vgs

   vgs
   VG      #PV #LV #SN Attr   VSize  VFree
   vg_test   1   3   0 wz--n- 99.51g    0 
   

3. 扩vg

vgextend vg_test /dev/sdb
Volume group "vg_test" successfully extended

vgdisplay
--- Volume group ---
VG Name               vg_test
System ID             
Format                lvm2
Metadata Areas        2
Metadata Sequence No  5
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                3
Open LV               3
Max PV                0
Cur PV                2
Act PV                2
VG Size               149.50 GiB
PE Size               4.00 MiB
Total PE              38273
Alloc PE / Size       25474 / 99.51 GiB
Free  PE / Size       12799 / 50.00 GiB
VG UUID               WyDOne-r1Xz-Vlcd-j7i5-2qr3-ql5O-fY5uOw

[root@node114 logs]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_test-lv_root   
                       50G   12G   36G  25% /
tmpfs                 7.9G   72K  7.9G   1% /dev/shm
/dev/sda1             485M   53M  408M  12% /boot
/dev/mapper/vg_test-lv_home
                       45G   30G   13G  70% /home

1. 扩lv
   ```bash
   lvextend -L +49.99G /dev/mapper/vg_test-lv_home
   Rounding size to boundary between physical extents: 49.99 GiB Extending logical volume lv_home to 95.62 GiB
   Logical volume lv_home successfully resized

vgs
VG #PV #LV #SN Attr VSize VFree
vg_test 2 3 0 wz--n- 149.50g 4.00m

6. 扩fs
```bash
resize2fs /dev/mapper/vg_test-lv_home     // 红帽7版本以下
xfs_growfs /dev/mapper/vg_test-lv_home    // 红帽7版本以上