云主机如何挂在磁盘

1、查看硬盘信息，看看是否需要分区

[root@host-10-1-1-68 ~]# 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: 0x000ba41f

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048     2099199     1048576   83  Linux
/dev/vda2         2099200    41943039    19921920   8e  Linux LVM

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


Disk /dev/vdb: 53.7 GB, 53687091200 bytes, 104857600 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


2、对硬盘进行分区操作,  没有输入的直接回车

[root@host-10-1-1-68 ~]# 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 0xc4d5568d.

Command (m for help): p

Disk /dev/vdb: 53.7 GB, 53687091200 bytes, 104857600 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: 0xc4d5568d

   Device Boot      Start         End      Blocks   Id  System

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): 
First sector (2048-104857599, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599): 
Using default value 104857599
Partition 1 of type Linux and of size 50 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.


查看新的分区

[root@host-10-1-1-68 ~]# fdisk -l

3、分区好的盘格式化

[root@host-10-1-1-68 ~]# mkfs.ext4 /dev/vdb
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
3276800 inodes, 13107200 blocks
655360 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2162163712
400 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000, 7962624, 11239424

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done 

4、挂在分区

[root@host-10-1-1-68 ~]# mkdir /var/lib/docker/
[root@host-10-1-1-68 ~]# mount /dev/vdb /var/lib/docker/
[root@host-10-1-1-68 ~]# cd /var/lib/docker/
[root@host-10-1-1-68 docker]# ls
lost+found
[root@host-10-1-1-68 docker]# touch q.sh
[root@host-10-1-1-68 docker]# vi q.sh 
[root@host-10-1-1-68 docker]# 
[root@host-10-1-1-68 docker]# ls
lost+found  q.sh
[root@host-10-1-1-68 docker]# cat q.sh 
iiii
[root@host-10-1-1-68 docker]# rm -rf q.sh 
[root@host-10-1-1-68 docker]# cd
[root@host-10-1-1-68 ~]# 
[root@host-10-1-1-68 ~]# 
[root@host-10-1-1-68 ~]# umount /dev/vdb
[root@host-10-1-1-68 ~]# vi /etc/fstab
/dev/mapper/centos-root /                       xfs     defaults        0 0
UUID=4cda1b18-f3f4-4031-bd45-71768526a9f8 /boot                   xfs     defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0
/dev/mapper/centos-swap swap                    swap    defaults        0 0
/dev/vdb     /var/lib/docker/                   ext4    defaults        0 0


[root@host-10-1-1-68 ~]# reboot
[root@host-10-1-1-68 ~]# df
Filesystem              1K-blocks   Used Available Use% Mounted on
/dev/mapper/centos-root  17811456 999188  16812268   6% /
devtmpfs                  3994028      0   3994028   0% /dev
tmpfs                     4005084      0   4005084   0% /dev/shm
tmpfs                     4005084  16724   3988360   1% /run
tmpfs                     4005084      0   4005084   0% /sys/fs/cgroup
/dev/vdb                 51474912  53272  48783816   1% /var/lib/docker
/dev/vda1                 1038336 145676    892660  15% /boot
tmpfs                      801020      0    801020   0% /run/user/0



5、磁盘繁忙解决

切换到别的目录再卸载即可