今天正在做一个实验,突然发现根目录满了,把这个过程记录下来(当初创建的时候给根目录分配的磁盘太小了.ahhhhh)
- 这是目前的磁盘情况
- 我查看了一下磁盘/dev/sda还有空余的空间
- 这种情况下,我只需要扩展vg的容量,然后给lv扩容即可,首先进行/dev/sda的磁盘分区,记得把新分的区改成8e
[[email protected] ~]# fdisk /dev/sda [[email protected] ~]# partprobe /dev/sda #使kernel重新读取分区 信息,从而避免重启系统。
- 再次查看,发现已经分区了一块5G大小的空间
- 创建pv
[[email protected] ~]# pvcreate /dev/sda3 Physical volume "/dev/sda3" successfully created.
- 扩展vg,首先先查看一下vg的信息,以免出错
[[email protected] ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 3 0 wz--n- 12.00g 4.00m [[email protected] ~]# vgextend centos /dev/sda3 Volume group "centos" successfully extended [[email protected] ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 2 3 0 wz--n- 17.00g 5.00g
- 扩展lv,让lv的大小增加5G
[[email protected] ~]# lvextend -L +5G /dev/mapper/centos-root Size of logical volume centos/root changed from 5.00 GiB (1280 extents) to 10.00 GiB (2560 extents). Logical volume centos/root successfully resized. [[email protected] ~]# xfs_growfs /dev/mapper/centos-root # 命令使系统重新读取大小 meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=327680 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=1310720, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 1310720 to 2621440
- 查看效果,根目录已经扩容
[[email protected] ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert app centos -wi-ao---- 5.00g root centos -wi-ao---- 10.00g swap centos -wi-ao---- 2.00g [[email protected] ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/centos-root 10G 4.6G 5.4G 46% / devtmpfs 471M 0 471M 0% /dev tmpfs 488M 0 488M 0% /dev/shm tmpfs 488M 21M 467M 5% /run tmpfs 488M 0 488M 0% /sys/fs/cgroup /dev/mapper/centos-app 5.0G 33M 5.0G 1% /app /dev/sda1 97M 60M 38M 62% /boot tmpfs 98M 12K 98M 1% /run/user/42 tmpfs 98M 0 98M 0% /run/user/0
这是一种情况,还有另一种情况,我就不再举例了,我前面博客有详细介绍
原文地址:http://blog.51cto.com/13805636/2310060
时间: 2024-11-03 17:28:56