以root身份登录系统进行以下操作。
一. 查看磁盘信息
注意：在没有分区和格式化数据盘之前,使用 df-h 命令是无法看到数据盘的。
fdisk -l
[root@ecs-CwM ~]# fdisk -l Disk /dev/vda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x0000425c Device Boot Start End Blocks Id System /dev/vda1 * 2048 2099199 1048576 83 Linux /dev/vda2 2099200 41943039 19921920 8e Linux LVM Disk /dev/vdb: 139.6 GB, 139586437120 bytes, 272629760 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-root: 18.2 GB, 18249416704 bytes, 35643392 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: 2147 MB, 2147483648 bytes, 4194304 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
二. 新建分区
fdisk /dev/vdb //这里的vdb是要挂载的新硬盘n //添加新分区 p //创建主分区 1 分区号1 按回车 //起始扇区选择默认 也是回车默认 //为了不浪费空间 p //查看创建出来的分区 w //保存
[root@ecs-CwM ~]# 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.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x7adc4797.
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 (2048-272629759, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-272629759, default 272629759):
Using default value 272629759
Partition 1 of type Linux and of size 130 GiB is set
查看创建出来的分区
Command (m for help): p Disk /dev/vdb: 139.6 GB, 139586437120 bytes, 272629760 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: 0x7adc4797 Device Boot Start End Blocks Id System /dev/vdb1 2048 272629759 136313856 83 Linux
保存并退出fdisk工具命令行
Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
三. 格式化分区
可格式为ext4或xfs
注：若选择xfs，需要匹配docker默认overlay2存储驱动，建议使用命令： mkfs.xfs -n ftype=1 /dev/vdb1
[root@ecs-CwM ~]# mkfs.xfs -n ftype=1 /dev/vdb1
meta-data=/dev/vdb1 isize=512 agcount=4, agsize=8519616 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=34078464, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=16639, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
四. 将新添加硬盘分区挂载到指定文件目录
mkdir /datavol mount /dev/vdb1 /datavol
五. 编辑配置文件，实现开机自动挂载
vi /etc/fstab
在末尾添加如下：
/dev/vdb1 /datavol xfs defaults 1 2
使用vi命令:wq保存退出，查看/etc/fstab配置文件
cat /etc/fstab# # /etc/fstab # Created by anaconda on Mon Jun 10 14:18:53 2019 # # 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=8223c1d3-9644-4885-80b9-f24158ea6013 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 /dev/vdb1 /datavol xfs defaults 1 2
六. 重启之后，验证是否成功
df -T
[root@ecs-CwM ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on devtmpfs devtmpfs 4064316 0 4064316 0% /dev tmpfs tmpfs 4077448 0 4077448 0% /dev/shm tmpfs tmpfs 4077448 8696 4068752 1% /run tmpfs tmpfs 4077448 0 4077448 0% /sys/fs/cgroup /dev/mapper/centos-root xfs 17811456 2175180 15636276 13% / /dev/vda1 xfs 1038336 289548 748788 28% /boot tmpfs tmpfs 815492 0 815492 0% /run/user/0 /dev/vdb1 xfs 136247300 32992 136214308 1% /datavol
七. 跨分区跨文件系统创建软链接目录
mv /var /datavol/ ln -s /datavol/var /var