linux6.9中调整/home分区增大其他

￡神魔★判官ぃ 2023-06-30 09:18 4阅读 0赞

需求：Home逻辑区划大了，格式化一部分给opt逻辑区。【原本opt只有7g,结果会增到10g】

环境：oracle\_linux6.9

\[root@localhost ~\]\# df -h  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VolGroup-lv\_root  
                      4.7G  3.3G  1.3G  73% /  
tmpfs                 492M   76K  492M   1% /dev/shm  
/dev/sda1             477M   77M  371M  18% /boot  
/dev/mapper/VolGroup-LogVol02  
                      4.7G  9.8M  4.5G   1% /home  
/dev/mapper/VolGroup-LogVol03  
                      7.6G   18M  7.2G   1% /opt  
\[root@localhost ~\]\# umount /home/  
\[root@localhost ~\]\# resizze2fs -p /dev/mapper/  
control            VolGroup-LogVol02  VolGroup-LogVol03  VolGroup-lv\_root   VolGroup-lv\_swap     
\[root@localhost ~\]\# df -h  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VolGroup-lv\_root  
                      4.7G  3.3G  1.3G  73% /  
tmpfs                 492M   76K  492M   1% /dev/shm  
/dev/sda1             477M   77M  371M  18% /boot  
/dev/mapper/VolGroup-LogVol03  
                      7.6G   18M  7.2G   1% /opt

\[root@localhost ~\]\# resize2fs -p /dev/mapper/VolGroup-LogVol02 4G  
resize2fs 1.43-WIP (20-Jun-2013)  
Please run 'e2fsck -f /dev/mapper/VolGroup-LogVol02' first.

\[root@localhost ~\]\# e2fsck -f /dev/mapper/VolGroup-LogVol02   
e2fsck 1.43-WIP (20-Jun-2013)  
Pass 1: Checking inodes, blocks, and sizes  
Pass 2: Checking directory structure  
Pass 3: Checking directory connectivity  
Pass 4: Checking reference counts  
Pass 5: Checking group summary information  
/dev/mapper/VolGroup-LogVol02: 11/320000 files (0.0% non-contiguous), 55366/1280000 blocks

**\[root@localhost ~\]\# resize2fs -p /dev/mapper/VolGroup-LogVol02\_home 4G  \[这里我故意放报错的看看，格式化时我加上路径Home是不对的，要看自己的卷组是什么名字才用什么名字。\]  
resize2fs 1.43-WIP (20-Jun-2013)  
open: No such file or directory while opening /dev/mapper/VolGroup-LogVol02\_home**

\[root@localhost ~\]\# resize2fs -p /dev/mapper/VolGroup-LogVol02 4G  
resize2fs 1.43-WIP (20-Jun-2013)  
Resizing the filesystem on /dev/mapper/VolGroup-LogVol02 to 1048576 (4k) blocks.  
Begin pass 3 (max = 40)  
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  
The filesystem on /dev/mapper/VolGroup-LogVol02 is now 1048576 blocks long.

\[root@localhost ~\]\# mount /home/  
\[root@localhost ~\]\# df -h  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VolGroup-lv\_root  
                      4.7G  3.4G  1.1G  76% /  
tmpfs                 492M   76K  492M   1% /dev/shm  
/dev/sda1             477M   77M  371M  18% /boot  
/dev/mapper/VolGroup-LogVol03  
                      7.6G   18M  7.2G   1% /opt  
/dev/mapper/VolGroup-LogVol02  
                      3.9G  9.8M  3.6G   1% /home

\[root@localhost ~\]\# lvreduce -L 4G /dev/mapper/VolGroup-LogVol02   
  WARNING: Reducing active and open logical volume to 4.00 GiB.  
  THIS MAY DESTROY YOUR DATA (filesystem etc.)  
Do you really want to reduce VolGroup/LogVol02? \[y/n\]: y  
  Size of logical volume VolGroup/LogVol02 changed from 4.88 GiB (1250 extents) to 4.00 GiB (1024 extents).  
  Logical volume LogVol02 successfully resized.

\[root@localhost ~\]\# vgdisplay   
  --- Volume group ---  
  VG Name               VolGroup  
  System ID               
  Format                lvm2  
  Metadata Areas        1  
  Metadata Sequence No  6  
  VG Access             read/write  
  VG Status             resizable  
  MAX LV                0  
  Cur LV                4  
  Open LV               4  
  Max PV                0  
  Cur PV                1  
  Act PV                1  
  VG Size               19.51 GiB  
  PE Size               4.00 MiB  
  Total PE              4994  
  Alloc PE / Size       4768 / 18.62 GiB  
  Free  PE / Size       226 / 904.00 MiB  
  VG UUID               Hrires-m0qh-Savz-JPHu-mJ9W-aA4W-Mjrngg  
     
\[root@localhost ~\]\# df -h  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VolGroup-lv\_root  
                      4.7G  3.5G  1.1G  78% /  
tmpfs                 492M   76K  492M   1% /dev/shm  
/dev/sda1             477M   77M  371M  18% /boot  
/dev/mapper/VolGroup-LogVol03  
                      7.6G   18M  7.2G   1% /opt  
/dev/mapper/VolGroup-LogVol02  
                      3.9G  9.8M  3.6G   1% /home

**\[root@localhost ~\]\# lvextend -L 900M /dev/mapper/VolGroup-LogVol03  【这里报错是没有加参数+在900前面】  
  New size given (225 extents) not larger than existing size (1998 extents)  
  Run \`lvextend --help' for more information.**

\[root@localhost ~\]\# lvextend -L +900M /dev/mapper/VolGroup-LogVol03   
  Size of logical volume VolGroup/LogVol03 changed from 7.80 GiB (1998 extents) to 8.68 GiB (2223 extents).  
  Logical volume LogVol03 successfully resized.

\[root@localhost ~\]\# resize2fs -p /dev/mapper/VolGroup-LogVol03   
resize2fs 1.43-WIP (20-Jun-2013)  
Filesystem at /dev/mapper/VolGroup-LogVol03 is mounted on /opt; on-line resizing required  
old\_desc\_blocks = 1, new\_desc\_blocks = 1  
The filesystem on /dev/mapper/VolGroup-LogVol03 is now 2276352 blocks long.

\[root@localhost ~\]\# df -h  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VolGroup-lv\_root  
                      4.7G  3.5G  978M  79% /  
tmpfs                 492M   76K  492M   1% /dev/shm  
/dev/sda1             477M   77M  371M  18% /boot  
/dev/mapper/VolGroup-LogVol03  
                      8.5G   18M  8.0G   1% /opt  
/dev/mapper/VolGroup-LogVol02  
                      3.9G  9.8M  3.6G   1% /home  
\[root@localhost ~\]\# umount /  【末尾我想试一试卸挂载的根目录，调整根目录大小，显示系统文件在进程中使用。】  
umount: /: device is busy.  
        (In some cases useful info about processes that use  
         the device is found by lsof(8) or fuser(1))

结果对比：

调整前：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70][]

调整后：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70 1][]

总结：调整home操作不难。清楚自己操作步骤，和每一步指令就行。

扩展一下，如果想调整根目录大小，压缩出空闲空间在如何操作。有知道麻烦告知。

参考[https://cloud.tencent.com/developer/article/1491957][https_cloud.tencent.com_developer_article_1491957]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200116183458850.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200116183514988.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2,size_16,color_FFFFFF,t_70
[https_cloud.tencent.com_developer_article_1491957]: https://cloud.tencent.com/developer/article/1491957