linux6.9中调整/home分区增大其他
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
[[email protected] ~]# 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
[[email protected] ~]# umount /home/
[[email protected] ~]# resizze2fs -p /dev/mapper/
control VolGroup-LogVol02 VolGroup-LogVol03 VolGroup-lv_root VolGroup-lv_swap
[[email protected] ~]# 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
[[email protected] ~]# resize2fs -p /dev/mapper/VolGroup-LogVol02 4G
resize2fs 1.43-WIP (20-Jun-2013)
Please run 'e2fsck -f /dev/mapper/VolGroup-LogVol02' first.
[[email protected] ~]# 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
[[email protected] ~]# 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
[[email protected] ~]# 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.
[[email protected] ~]# mount /home/
[[email protected] ~]# 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
[[email protected] ~]# 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.
[[email protected] ~]# 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
[[email protected] ~]# 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
[[email protected] ~]# 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.
[[email protected] ~]# 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.
[[email protected] ~]# 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.
[[email protected] ~]# 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
[[email protected] ~]# 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：
调整后：
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。