CentOS重新调整分区大小

# 查看分区大小 [root@NextCloud ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 50G 49G 1.6G 97% / ... /dev/mapper/centos-home 965G 33M 965G 1% /home ... ​ # 卸载/home，卸载前记得备份cp -r /home/ homebak/ 我这里/home下没有什么文件，就不备份了
cp -r /home/ homebak/
 [root@NextCloud ~]# umount /home

卸载磁盘，出现target is busy
解决办法：1.使用fuser

安装fuser：yum install -y psmisc
fuser -mk +磁盘挂载路径
2、使用lsof，获取进程ID，通过杀死进程，结束磁盘占用
（1）获取进程id
lsof 磁盘挂载路径
（2）kill杀死进程
kill PID

[root@NextCloud ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 50G 49G 1.6G 97% / ... # 移除/home所在的lv [root@NextCloud ~]# lvremove /dev/mapper/centos-home Do you really want to remove active logical volume centos/home? [y/n]: y Logical volume "home" successfully removed ​ # 增加/所在的lv，这里我们增加500G空间 [root@NextCloud ~]# lvextend -L +500G /dev/mapper/centos-root Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 550.00 GiB (140800 extents). Logical volume centos/root successfully resized. ​ # 增加lv后查看/并没有增加，确认分区格式 [root@NextCloud ~]# df -hT 文件系统 类型 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root xfs 50G 49G 1.6G 97% / ... ​ # 扩展/所在文件系统 [root@NextCloud ~]# xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=3276800 blks = sectsz=4096 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=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 13107200 to 144179200 ​ # 查看分区大小 [root@NextCloud ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 550G 49G 502G 9% / ... ​ # 确认Free PE可分配空间 [root@NextCloud ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 7 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size <1023.00 GiB PE Size 4.00 MiB Total PE 261887 Alloc PE / Size 168416 / <657.88 GiB Free PE / Size 93471 / 365.12 GiB VG UUID TDRsyJ-GZ2H-ZRWr-Gfje-LNe1-ggpz-0pJ7jx ​ # 创建home lv分区 [root@NextCloud ~]# lvcreate -L 100G -n home centos Logical volume "home" created. ​ # 格式化home分区 [root@NextCloud ~]# mkfs.xfs /dev/centos/home meta-data=/dev/centos/home isize=512 agcount=4, agsize=6553600 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0 data = bsize=4096 blocks=26214400, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=12800, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 ​ # 挂载/home [root@NextCloud ~]# mount /dev/centos/home /home ​ # 查看分区大小 [root@NextCloud ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 550G 49G 502G 9% / ... /dev/mapper/centos-home 100G 33M 100G 1% /home ...