华为云之EVS云硬盘的使用与快速入门

一、EVS云硬盘介绍

云硬盘（Elastic Volume Service）是一种为ECS、BMS等计算服务提供持久性块存储的服务，通过数据冗余和缓存加速等多项技术，提供高可用性和持久性，以及稳定的低时延性能。您可以对云硬盘做格式化、创建文件系统等操作，并对数据做持久化存储。

二、购买ECS云服务器

1.创建windows系统的ECS云主机

2.创建Linux系统的ECS云主机

三、创建EVS云硬盘

创建两块云硬盘，一块挂载windows使用，一块挂载linux使用

四、云硬盘挂载windows系统的ECS

1.挂载云硬盘windows

2.登录到windows的ECS云主机

3.查看磁盘列表

4.初始化磁盘

5.新建卷

6.查看新加卷

7.向磁盘写入数据

五、云硬盘挂载Linux系统的ECS

1.挂载到Linux系统的云主机

2.进入Linux云主机

3.查看磁盘列表

[root@ecs-b15f ~]# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda    253:0    0  40G  0 disk 
└─vda1 253:1    0  40G  0 part /
vdb    253:16   0  10G  0 disk 

3.磁盘分区

[root@ecs-b15f ~]# 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 0xb7e5d6cb.

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 (2048-20971519, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): 
Using default value 20971519
Partition 1 of type Linux and of size 10 GiB is set

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

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

4.格式化磁盘

[root@ecs-b15f ~]# mkfs.ext4 /dev/vdb1
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
655360 inodes, 2621184 blocks
131059 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2151677952
80 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

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

5.挂载分区

[root@ecs-b15f ~]# mount /dev/vdb1 /data/
[root@ecs-b15f ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        486M     0  486M   0% /dev
tmpfs           496M     0  496M   0% /dev/shm
tmpfs           496M  6.8M  489M   2% /run
tmpfs           496M     0  496M   0% /sys/fs/cgroup
/dev/vda1        40G  2.1G   36G   6% /
tmpfs           100M     0  100M   0% /run/user/0
/dev/vdb1       9.8G   37M  9.2G   1% /data

6.向磁盘写入数据

[root@ecs-b15f ~]# cd /data/
[root@ecs-b15f data]# touch file100
[root@ecs-b15f data]# ll
total 16
-rw-r--r-- 1 root root     0 Oct 21 21:39 file100
drwx------ 2 root root 16384 Oct 21 21:37 lost+found

六、云硬盘EVS快照

1.创建磁盘快照

2.查看快照列表

3.删除文件

[root@ecs-b15f data]# ls
file100  lost+found
[root@ecs-b15f data]# rm -rf file100
[root@ecs-b15f data]# ll
total 16
drwx------ 2 root root 16384 Oct 21 21:37 lost+found
[root@ecs-b15f data]# 

4.卸载分区

umount /data

5.卸载云硬盘

6.使用快照恢复磁盘

7.重新挂载linux云主机

8.查看数据恢复情况

[root@ecs-b15f ~]# mount /dev/vdb1 /data
[root@ecs-b15f ~]# cd /data/
[root@ecs-b15f data]# ls
file100  lost+found
[root@ecs-b15f data]#