Centos7系统根分区空间小,删除home分区给根分区用!
内网一台小机子,拢共就120G的固态,装CentOS7的时候,默认/
给了50G,/home
给了60G,为了方便自己,装了个宝塔面板,开了个FTP账号备份电脑上的一些资源,一没注意!/
分区满了,但我资源还有好几个分包没传上去,一看!宝塔默认站点在 /www/wwwroot
下,占用的是 /
的空间,很显然,让本不富裕的根目录更加的雪上加霜了,反正想了下机子也是做服务器的,/hoome
目录可有可无,干掉 /home
给根目录用吧,然后你们就看到了这篇博文!
操作流程
开始之前,使用 df -h
看一下分区构成
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.8G 8.0K 3.8G 1% /dev/shm
tmpfs 3.8G 8.8M 3.8G 1% /run
tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 8.0G 43G 16% /
/dev/sda1 1014M 152M 863M 15% /boot
/dev/mapper/centos-home 61G 33M 61G 1% /home
tmpfs 773M 0 773M 0% /run/user/0
可以看到我这里 /dev/mapper/centos-home
,也就是 /home
目录占了 61G,因此把这个删掉就能腾出61G用了!
输入 vi /etc/fstab
命令,删除或注释掉 /dev/mapper/centos-home
分区配置
#
# /etc/fstab
# Created by anaconda on Wed Apr 6 09:48:16 2022
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=f2398027-d80e-44fc-ab5e-500946559065 /boot xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0 swap defaults 0 0
使用 umount /home/
卸载 /home
分区
使用命令 lvscan
看下有哪些逻辑分区
返回内容参考如下
[root@localhost ~]# lvscan
ACTIVE '/dev/centos/swap' [7.75 GiB] inherit
ACTIVE '/dev/centos/home' [60.48 GiB] inherit
ACTIVE '/dev/centos/root' [50.00 GiB] inherit
使用 lvremove /dev/centos/home
移除分区,会有个二次确认,输入y确认即可!
[root@localhost ~]# lvremove /dev/centos/home
Do you really want to remove active logical volume centos/home? [y/n]: y
Logical volume "home" successfully removed
使用 vgdisplay
命令查看是否释放了对应的容量出来
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <118.24 GiB
PE Size 4.00 MiB
Total PE 30269
Alloc PE / Size 14784 / 57.75 GiB
Free PE / Size 15485 / <60.49 GiB
VG UUID 0QI8dR-zhgD-mFIl-XJoI-VIi5-QAby-CqGsft
可以看到已经成功了!参考字样:Free PE / Size 15485 / <60.49 GiB
使用 lvextend -l +100%free /dev/mapper/centos-root
命令把空闲出来的容量全给 /
路径!
[root@localhost ~]# lvextend -l +100%free /dev/mapper/centos-root
Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to <110.49 GiB (28285 extents).
Logical volume centos/root successfully resized.
操作完成后,容量并不是及时刷新,需要使用 xfs_growfs /dev/mapper/centos-root
刷新一下容量
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 28963840
然后输入 df -h
就可以发现,调整成功了!
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.8G 8.0K 3.8G 1% /dev/shm
tmpfs 3.8G 8.8M 3.8G 1% /run
tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 111G 8.0G 103G 8% /
/dev/sda1 1014M 152M 863M 15% /boot
tmpfs 773M 0 773M 0% /run/user/0