拉取网易蜂巢的mysql-server：5.6
docker pull hub.c.163.com/nce2/mysql:5.6
创建mysql5.6容器 1master+3个slave
docker run --name mysql-master -d -P hub.c.163.com/nce2/mysql:5.6
docker run --name mysql-slave1 -d -P hub.c.163.com/nce2/mysql:5.6
docker run --name mysql-slave2 -d -P hub.c.163.com/nce2/mysql:5.6
docker run --name mysql-slave3 -d -P hub.c.163.com/nce2/mysql:5.6
验证容器状态
[root@bogon ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
907bbbf25d25 hub.c.163.com/nce2/mysql:5.6 "/run.sh" 5 minutes ago Up 5 minutes 3306/tcp mysql-slave3
a81df6c86808 hub.c.163.com/nce2/mysql:5.6 "/run.sh" 5 minutes ago Up 5 minutes 3306/tcp mysql-slave2
375eabd4c598 hub.c.163.com/nce2/mysql:5.6 "/run.sh" 5 minutes ago Up 5 minutes 3306/tcp mysql-slave1
1651d1cab219 hub.c.163.com/nce2/mysql:5.6 "/run.sh" 14 minutes ago Up 14 minutes 3306/tcp mysql-master
通过主机命令行进入master容器
docker exec -it mysql-master bash
[root@bogon ~]# docker exec -it mysql-master bash
root@1651d1cab219:/#
在master中创建一个数据库test_docker
root@1651d1cab219:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.19-v1-log MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.02 sec)
mysql> create database test_docker;
Query OK, 1 row affected (0.06 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
| test_docker |
+--------------------+
6 rows in set (0.00 sec)
在slave1中创建一个数据库test_docker
[root@bogon ~]# docker exec -it mysql-slave bash
Error response from daemon: No such container: mysql-slave
[root@bogon ~]# docker exec -it mysql-slave1 bash
root@375eabd4c598:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.19-v1-log MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
通过以上的信息说明master与slave是数据隔离的，
所以我们可以通过docker创建N个mysql容器，
然后就能以很小的代价就能学习《高可用MySQL》中的数据模型 再也不用发愁机器不够用。
后续操作
登录到master容器
[root@bogon ~]# docker exec -it mysql-master bash
root@1651d1cab219:/#
怎么查看容器的操作系统环境
一般就是
uname -a
cat /etc/pro
cat /etc/lsb-release
很幸运我们的容器是ubuntu14.04
root@1651d1cab219:/# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
但是执行 apt-get install时候却什么也装不了
需要更改
cd /etc/apt/
没有 vi vim ee 编辑器 只好追加内容到 sources.list
echo deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse >> sources.list
echo deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse >> sources.list
echo deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse >> sources.list
echo deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse >> sources.list
echo deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse >> sources.list
echo deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse >> sources.list
echo deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse >> sources.list
echo deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse >> sources.list
echo deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse >> sources.list
echo deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse >> sources.list
然后 更新源
apt-get update
apt-get install vim
然后通过vim把sources.list文件的前两行删除掉 再重新update一下。
apt-get update
安装一个网络工具获取ip
apt-get install net-tools
获取到master的ip地址
root@1651d1cab219:/# ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:ac:11:00:02
inet addr:172.17.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe11:2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15119 errors:0 dropped:0 overruns:0 frame:0
TX packets:12633 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:34197557 (34.1 MB) TX bytes:897732 (897.7 KB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2212 (2.2 KB) TX bytes:2212 (2.2 KB)
slave也需要这么做
还有一种方法
可以创建Dockerfile依赖mysql镜像创建一个新的镜像。
上诉命令通过RUN来执行创建的新容器会有安装的软件。
最后通过slave的docker连接到master的容器mysql服务器上
master的服务器mysql账号root赋值权限
mysql> grant all privileges on *.* to root@'%' identified by '';
Query OK, 0 rows affected (0.02 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)
slave服务器执行如下命令
[root@bogon ~]# mysql -uroot -p -h 172.17.0.2
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.6.19-v1-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]>
在master上将test_docker数据库删除，看slave的终端是否也不显示已删除的库
master操作
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
| test_docker |
+--------------------+
6 rows in set (0.00 sec)
mysql> drop database test_docker;
Query OK, 0 rows affected (0.06 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
slave操作
MySQL [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| #bak_database |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
MySQL [(none)]>