服务器系统是“CentOS Linux release 7.1.1503 (Core)”,此处只是做记录使用,调整过程中做好数据备份。
1、查看现有分区大小
# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 50G 787M 50G 2% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 8.7M 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/mapper/centos-home 91G 33M 91G 1% /home /dev/sda1 497M 123M 374M 25% /boot
2、备份并卸载、删除home分区
备份home分区 # tar cvf /root/home.tar /home/ 关闭正在使用/home分区的进程 # fuser -m /home/ 卸载home分区 # umount /home 删除home分区所在的lv # lvremove /dev/mapper/centos-home Do you really want to remove active logical volume home? [y/n]: y Logical volume "home" successfully removed
3、扩展root分区所在的lv
# 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 148.56 GiB PE Size 4.00 MiB Total PE 38031 Alloc PE / Size 14816 / 57.88 GiB Free PE / Size 23215 / 90.68 GiB VG UUID obgcgh-jGqr-5D9S-5oji-ilnt-DMm3-NuxaQ0 此时可以看到Free部分是90.68G,分配60G到/分区,剩余的用来创建home分区。 增加50G给root分区: # lvextend -L +50G /dev/mapper/centos-root Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 100.00 GiB (25600 extents). Logical volume root successfully resized 扩容root分区所在的lv: # xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=3276800 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=13107200, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 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 26214400
4、创建home分区的lv:
此时用vgdisplay查看剩余40.68G,可以指定加多少G,也可以给空闲全部给home分区。 # lvcreate -l +100%FREE -n /dev/mapper/centos-home Logical volume "home" created. 格式化分区: # mkfs.xfs /dev/mapper/centos-home 挂载home分区: # mount /dev/mapper/centos-home 恢复备份的数据: # tar xvf /root/home.tar -C /home/
5、查看调整结果
# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 100G 976M 100G 1% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 8.7M 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/mapper/centos-home 41G 33M 41G 1% /home /dev/sda1 497M 123M 374M 25% /boot
上述是调整过程,生产环境中调整一定要做好数据备份。