Centos扩容根分区
将/u01分区容量划分给/根分区
一、查看当前分区
[root@server01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 23G 19G 4.0G 83% /
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 4.0G 900M 3.2G 22% /dev/shm
tmpfs 3.9G 13M 3.8G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 297M 162M 136M 55% /boot
/dev/mapper/centos-u01 20G 982M 19G 5% /u01
tmpfs 781M 12K 781M 1% /run/user/42
tmpfs 781M 0 781M 0% /run/user/54322
tmpfs 781M 0 781M 0% /run/user/0二、查看当前磁盘
[root@server01 ~]# fdisk -l
Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0009face
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 616447 307200 83 Linux
/dev/sda2 616448 104857599 52120576 8e Linux LVM
Disk /dev/mapper/centos-root: 23.8 GB, 23802675200 bytes, 46489600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 8589 MB, 8589934592 bytes, 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-u01: 21.0 GB, 20971520000 bytes, 40960000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes三、备份/u01数据
[root@server01 ~]# mkdir /u02
[root@server01 ~]# /u01/app/18.3.0/grid/bin/crsctl stop cluster -all
[root@server01 ~]# /u01/app/18.3.0/grid/bin/crsctl stop crs
[root@server01 ~]# mv /u01/app /u02/四、卸载并删除/u01
[root@server01 ~]# umount /u01
umount: /u01: target is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
[root@server01 ~]# fuser -mvi /u01
USER PID ACCESS COMMAND
/u01: root kernel mount /u01
grid 11639 F.c.. OSWatcher.sh
grid 11889 F.c.. OSWatcherFM.sh
grid 35351 F.c.. sleep
grid 35511 F.c.. sleep
[root@server01 ~]# fuser -mvik /u01
USER PID ACCESS COMMAND
/u01: root kernel mount /u01
grid 11639 F.c.. OSWatcher.sh
grid 11889 F.c.. OSWatcherFM.sh
grid 35982 F.c.. sleep
grid 36003 F.c.. sleep
Kill process 11639 ? (y/N) y
Kill process 11889 ? (y/N) y
Kill process 35982 ? (y/N) y
Kill process 36003 ? (y/N) y
[root@server01 ~]# umount /u01五、删除/u01分区
[root@server01 ~]# lvremove /dev/mapper/centos-u01
Do you really want to remove active logical volume centos/u01? [y/n]: y
Logical volume "u01" successfully removed六、扩展/root分区
5001*4/1024=19G
[root@server01 ~]# lvextend -L +20G /dev/mapper/centos-root
Insufficient free space: 5120 extents needed, but only 5001 available
[root@server01 ~]# lvextend -L +19G /dev/mapper/centos-root
Size of logical volume centos/root changed from <22.17 GiB (5675 extents) to <41.17 GiB (10539 extents).
Logical volume centos/root successfully resized.七、扩展文件系统
[root@server01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 23G 19G 4.0G 83% /
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 4.0G 0 4.0G 0% /dev/shm
tmpfs 3.9G 13M 3.8G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 297M 162M 136M 55% /boot
tmpfs 781M 12K 781M 1% /run/user/42
tmpfs 781M 0 781M 0% /run/user/0
[root@server01 ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1452800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=5811200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2837, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 5811200 to 10932224
[root@server01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 42G 19G 24G 44% /
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 4.0G 0 4.0G 0% /dev/shm
tmpfs 3.9G 13M 3.8G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 297M 162M 136M 55% /boot
tmpfs 781M 12K 781M 1% /run/user/42
tmpfs 781M 0 781M 0% /run/user/0八、修改fstab
删除/etc/fstab中对/u01分区的挂载
[root@server01 ~]# more /etc/fstab
#
# /etc/fstab
# Created by anaconda on Sun Jan 23 19:53:26 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=61c5fe1d-b778-49fd-91ed-9e565ddbd88b /boot xfs defaults 0 0
#/dev/mapper/centos-u01 /u01 xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults,size=4096M 0 0
[root@server01 ~]# reboot