076、创建Rex-Ray volume （2019-04-23 周二）

参考https://www.cnblogs.com/CloudMan6/p/7624556.html

 

前面我们安装部署了 Rex-Ray ，并且成功配置 Virtualbox backend ，今天学习如何创建和使用 Rex-Ray volume

 

在 docker1 或 docker2 上执行如下命令创建 volume

 

rexray volume create --size 2 'c:\share\mysqldata'

 

--size 指定创建volume的大小，单位GB

 

最后是创建volume的绝对路径，因为 \ 是特殊字符，需要用单引号引起来

 

root@docker1:~# rexray volume create --size 2 'c:\share\mysqldata'

ID                                    Name       Status     Size

cd335365-dea0-4e22-95ce-daa0258595e8  mysqldata  available  2

root@docker1:~# rexray volume ls

ID                                    Name          Status       Size

c2b3c553-dc43-4df1-8a72-faa26a9ee861  docker1.vmdk  attached     20

cec5b10d-8bc1-4326-bb9b-e3add075f3f1  docker2.vmdk  unavailable  20

cd335365-dea0-4e22-95ce-daa0258595e8  mysqldata     available    2

root@docker1:~# docker volume ls

DRIVER              VOLUME NAME

rexray              docker1.vmdk

rexray              docker2.vmdk

rexray              mysqldata

 

 

 

创建mysql容器并使用Rex-Ray volume

 

root@docker1:~# docker run --name mydb_on_docker1 -v mysqldata:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=passw0rd -d mysql

 

root@docker1:~# docker volume inspect mysqldata

[

    {

        "CreatedAt": "0001-01-01T00:00:00Z",

        "Driver": "rexray",

        "Labels": null,

        "Mountpoint": "",

        "Name": "mysqldata",

        "Options": null,

        "Scope": "global",

        "Status": {

            "availabilityZone": "",

            "fields": null,

            "iops": 0,

            "name": "mysqldata",

            "server": "virtualbox",

            "service": "virtualbox",

            "size": 2,

            "type": "HardDisk"

        }

    }

]

root@docker1:~# docker inspect mydb_on_docker1 | jq .[0].Mounts

[

  {

    "Type": "volume",

    "Name": "mysqldata",

    "Source": "",

    "Destination": "/var/lib/mysql",

    "Driver": "rexray",

    "Mode": "",

    "RW": true,

    "Propagation": ""

  }

]

 

 

下图可以看到 Rex-Ray volume mysqldata 已经挂载到docker1 上

 

 

 

当前实验拓扑如下图所示：

 

 

下面登录数据库，并对数据库就行一些修改，然后销毁mysql容器

 

root@docker1:~# docker exec -it mydb_on_docker1 bash

root@f00b063008f8:/# mysql -p    #    登录数据库

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 8.0.15 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

 

mysql> use mysql    #    切换到mysql库

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

 

Database changed

mysql> create table my_id(id int(4));    #       创建表

Query OK, 0 rows affected (0.03 sec)

 

mysql> insert my_id values(111);    #    在表中插入数据

Query OK, 1 row affected (0.01 sec)

 

mysql> select * from my_id;    #    查询表中数据

+------+

| id   |

+------+

|  111 |

+------+

1 row in set (0.00 sec)

 

mysql> exit

Bye

root@f00b063008f8:/# exit

root@docker1:~# docker stop mydb_on_docker1    #    stop容器

mydb_on_docker1

root@docker1:~# docker rm  mydb_on_docker1    #    销毁容器

mydb_on_docker1

 

 

最后可以看到，mysqldata 自动从docker1 上卸载了