1.控制台扩容 重启服务器(一定要在控制台停机 然后启动，不能偷懒执行命令完成)
2.查看磁盘空间 df -hl
3.停止网站 nginx -s stop
4.创建快照
5.卸载分区 umount /dev/vdb1
(如果出现 umount: /data: target is busy.)
5.1 检查分区有哪个程序占用(然后kill pid) lsof /dev/vdb1
5.2 如果没有安装lsof yum install lsof
5.3 kill完进程后 重新执行 卸载分区 umount /dev/vdb1
6.查看磁盘空间，查看/dev/vdb1是否被成功卸载 df -hl
7.查看分区 fdisk -l
8.进入分区操作 fdisk /dev/vdb (这里没有错，这里是指的整个盘 vdb1 是其中的一个区)
9.依次输入：d n p 1 回车 回车 wq 并按回车键，开始分区(是否分区成功 观察 Partition 1 of type Linux and of size [分区后新容量] GiB is set )
10.再次卸载分区 umount /dev/vdb1
11.检查修复文件系统 e2fsck -f /dev/vdb1
12.变更文件系统大小 resize2fs /dev/vdb1
13.挂载分区 mount /dev/vdb1 /data
14.查看分区 df -h
15.重启服务器 shutdown -r now
[root@iZwz95wvlhb3mr6g0d69wqZ ~]# fdisk -l Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x635e6c7d Device Boot Start End Blocks Id System /dev/vda1 2048 83886079 41942016 83 Linux Disk /dev/vdb: 214.7 GB, 214748364800 bytes, 419430400 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: 0x8f986be8 Device Boot Start End Blocks Id System /dev/vdb1 2048 209715199 104856576 83 Linux [root@iZwz95wvlhb3mr6g0d69wqZ ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): d Selected partition 1 Partition 1 is deleted Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-419430399, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-419430399, default 419430399): Using default value 419430399 Partition 1 of type Linux and of size 200 GiB is set Command (m for help): wq The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@iZwz95wvlhb3mr6g0d69wqZ ~]# umount /dev/vdb1 [root@iZwz95wvlhb3mr6g0d69wqZ ~]# e2fsck -f /dev/vdb1 e2fsck 1.42.9 (28-Dec-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/vdb1: 1340418/6553600 files (31.5% non-contiguous), 21356900/26214144 blocks [root@iZwz95wvlhb3mr6g0d69wqZ ~]# resize2fs /dev/vdb1 resize2fs 1.42.9 (28-Dec-2013) Resizing the filesystem on /dev/vdb1 to 52428544 (4k) blocks. The filesystem on /dev/vdb1 is now 52428544 blocks long. [root@iZwz95wvlhb3mr6g0d69wqZ ~]# mount /dev/vdb1 /data [root@iZwz95wvlhb3mr6g0d69wqZ ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 17G 21G 46% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 268K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup tmpfs 783M 0 783M 0% /run/user/0 /dev/vdb1 197G 80G 108G 43% /data