注意,本文是介绍lvm分区下的home分区的空间,转换到/分区的方法。文件系统问xfs
1.查看CentOS的系统版本(系统版本必须为7版本)
cat /etc/redhat-release
2.查看分区
(centos-home和centos-root每人的名字可能不一样) 注意看一下/home分区的大小,这里假设是120G。
df -h
3.备份home分区文件
tar cvf /tmp/home.tar /home
4.卸载/home,如果无法卸载,先终止使用/home文件系统的进程
umount /home (卸载)
卸载时,如果发现/home在使用中,所以先终止。
fuser -km /home/(终止)
再次卸载,没有报错,表示成功
5.删除/home所在的lv
lvremove /dev/mapper/centos-home
6.扩展/root所在的lv
lvextend -L +100G /dev/mapper/centos-root
注意,这里只转移100G过来,剩余的还依旧保留。
7.扩展/root文件系统xfs文件系统
xfs_growfs /dev/mapper/centos-root
或者ext文件格式用
resize2fs /dev/mapper/centos-root
查看分区情况
vgdisplay
df -h
如果不需要home,可以把所有分区大小都给home,那么下面的步骤就可以省略了。
但是需要多一个步骤就是在分区表里去掉挂载的home分区。
vi /etc/fstab /找到home的那个分区,在前面加一个#
----------------------------还需要home分区的继续向下------------------------------
8.重新创建home lv (创建时计算好剩余的磁盘容量,建议比剩余小1G左右)我们是120G-100G -1G=19G
lvcreate -L 19G -n /dev/mapper/centos-home
9.创建文件系统
mkfs.xfs /dev/mapper/centos-home
10.挂载home
mount /dev/mapper/centos-home
11.home文件恢复
tar xvf /tmp/home.tar -C /home/
12.再次使用df -h查看系统磁盘大小
df -h
其他相关内容参考:
CentOS7根目录磁盘扩容(/dev/mapper/centos-root 空间不足)(示例代码)
http://www.33f.net/setup/centos_extend_hdd_root.html
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本文最后更新于2022年05月21日 ,已超过945天没有更新,若内容或图片失效,请留言反馈。
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