Redis主从复制和主从切换

1. 配置主从复制

1. 建立从文件夹，譬如 /usr/local/slaves/下建立　6380 6381 两个文件夹（两个从服务器）

2. 复制redis.conf到刚建立的两个文件夹中

3. 修改redis.conf 中的

1. port 6380

2. slaveof 127.0.0.1 6379  ------ip表示主服务器的ｉｐ　　端口表示主服务器端口

3. 保存退出，另一个从服务器做同样修改，如果端口不是6380，修改断开即可，此处修改为6381

4. 启动主服务器　redis-server redis.conf

5. 进入从服务器文件夹，启动从服务器
   

6. 查看主服务器信息：redis-cli -p 6379 info Replication,可以看到有两个从服务器

7. redis-cli -p 6379 进去主服务器，存储数据 set key val

8. 进入从服务器，redis-cli -p 6380 查看数据 get key 　查看是否能取出数据

2. 配置主从切换

1. 新建文件 sentinel.conf

2. 编辑文件

3. ####master  sentinel.conf
   ##sentinel实例之间的通讯端口
   port 26379
   ####sentinel需要监控的master信息：<mastername> <masterIP> <masterPort> <quorum>.
   ####<quorum>应该小于集群中slave的个数,只有当至少<quorum>个sentinel实例提交"master失效" 才会认为master为ODWON("客观"失效) .
   sentinel monitor mymaster 127.0.0.1 6381 1
   sentinel down-after-milliseconds mymaster 1000
   sentinel failover-timeout mymaster 180000
   sentinel parallel-syncs mymaster 1

4. 其他两个文件只需要修改端口即可

5. 启动redis-sentinel sentinel.conf &
   

3. 通过java读写主从服务器

1. 需要添加Spring配置和其他两个ｊａｒ包

2. <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <springVersion>3.2.9.RELEASE</springVersion>
   </properties>
   
   <dependencies>
       <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-pool2</artifactId>
           <version>2.4.2</version>
       </dependency>
   
   
       <dependency>
           <groupId>org.springframework.data</groupId>
           <artifactId>spring-data-redis</artifactId>
           <version>1.6.0.RELEASE</version>
       </dependency>
   
       <dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-context</artifactId>
           <version>${springVersion}</version>
       </dependency>
       <dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-tx</artifactId>
           <version>${springVersion}</version>
       </dependency>
       <dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-context-support</artifactId>
           <version>${springVersion}</version>
       </dependency>
       <dependency>
           <groupId>cglib</groupId>
           <artifactId>cglib-nodep</artifactId>
           <version>3.1</version>
       </dependency>
   
   
       <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-lang3</artifactId>
           <version>3.1</version>
       </dependency>
       <dependency>
           <groupId>com.alibaba</groupId>
           <artifactId>fastjson</artifactId>
           <version>1.2.5</version>
       </dependency>
       <dependency>
           <groupId>org.aspectj</groupId>
           <artifactId>aspectjweaver</artifactId>
           <version>1.8.2</version>
       </dependency>
   
       <dependency>
           <groupId>junit</groupId>
           <artifactId>junit</artifactId>
           <version>4.8</version>
           <scope>test</scope>
       </dependency>
       <dependency>
           <groupId>net.sf.ehcache</groupId>
           <artifactId>ehcache</artifactId>
           <version>2.7.5</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-api</artifactId>
           <version>1.6.6</version>
       </dependency>
       <dependency>
           <groupId>redis.clients</groupId>
           <artifactId>jedis</artifactId>
           <version>2.4.2</version>
       </dependency>
       <dependency>
           <groupId>commons-pool</groupId>
           <artifactId>commons-pool</artifactId>
           <version>1.6</version>
       </dependency>
       <dependency>
           <groupId>commons-logging</groupId>
           <artifactId>commons-logging</artifactId>
           <version>1.1.1</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-log4j12</artifactId>
           <version>1.7.10</version>
           <scope>test</scope>
       </dependency>
   </dependencies>

3. Spring配置

1. <bean id="redisSentinelConfiguration" class="org.springframework.data.redis.connection.RedisSentinelConfiguration">
       <property name="master">
           <bean class="org.springframework.data.redis.connection.RedisNode">
               <property name="name" value="mymaster"/>
           </bean>
       </property>
       <property name="sentinels">
           <set>
               <bean class="org.springframework.data.redis.connection.RedisNode">
                   <constructor-arg name="host" value="127.0.0.1"></constructor-arg>
   
                   <constructor-arg name="port" value="26479"></constructor-arg>
               </bean>
               <bean class="org.springframework.data.redis.connection.RedisNode">
                   <constructor-arg name="host" value="127.0.0.1"></constructor-arg>
   
                   <constructor-arg name="port" value="26579"></constructor-arg>
               </bean>
           </set>
       </property>
   </bean>
   
   <bean id="jeidsConnectionFactory"
   
         class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
   
       <constructor-arg ref="redisSentinelConfiguration"/>
   
   </bean>
   
   
   <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
       <property name="connectionFactory" ref="jeidsConnectionFactory"/>
   </bean>

4. java测试

1. import org.junit.Before;
   import org.junit.Test;
   import org.springframework.context.ApplicationContext;
   import org.springframework.context.support.ClassPathXmlApplicationContext;
   import org.springframework.dao.DataAccessException;
   import org.springframework.data.redis.connection.RedisConnection;
   import org.springframework.data.redis.core.RedisCallback;
   import org.springframework.data.redis.core.RedisTemplate;
   
   /**
    * Created by vincent on 15-10-13.
    */
   public class CommonTest {
   
       private ApplicationContext context ;
   
       private RedisTemplate redisTemplate;
       final String key ="key7";
   
       @Before
       public void init(){
           context = new ClassPathXmlApplicationContext("applicationContext.xml");
           redisTemplate= context.getBean("redisTemplate",RedisTemplate.class);
       }
   
       @Test
       public void test1(){
           redisTemplate.execute(new RedisCallback() {
               @Override
               public Long doInRedis(RedisConnection redisConnection) throws DataAccessException {
                    redisConnection.set(key.getBytes(),(System.currentTimeMillis()+"").getBytes());
                   return 1L;
               }
           });
       }
   
       @Test
       public void  test2(){
           Object execute = redisTemplate.execute(new RedisCallback() {
               @Override
               public Object doInRedis(RedisConnection redisConnection) throws DataAccessException {
                   return redisConnection.get(key.getBytes());
               }
           });
   
           System.out.println(new String((byte[])execute));
   
       }
   }

参考文档：

    http://redis.readthedocs.org/en/latest/topic/sentinel.html