spring-data-redis使用哨兵配置一主多从

redis自带的哨兵确实简化了高可用性的配置，使用起来也比较简单。

首先是spring-redis-sentinel.xml（文件名可以随意命名）配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- Spring自动将该包目录下标记为@Service的所有类作为spring的Bean -->
    <context:component-scan base-package="com.zz.redis" />

<!--     <context:property-placeholder location="classpath:conf/redis/redis.properties" /> -->

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxTotal" value="2048" />
        <property name="maxIdle" value="200" />
        <property name="numTestsPerEvictionRun" value="1024" />
        <property name="timeBetweenEvictionRunsMillis" value="30000" />
        <property name="minEvictableIdleTimeMillis" value="-1" />
        <property name="softMinEvictableIdleTimeMillis" value="10000" />
        <property name="maxWaitMillis" value="1500" />
        <property name="testOnBorrow" value="true" />
        <property name="testWhileIdle" value="true" />
        <property name="testOnReturn" value="false" />
        <property name="jmxEnabled" value="true" />
        <property name="blockWhenExhausted" value="false" />
    </bean>

    <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">
                </property>
            </bean>
        </property>
        <property name="sentinels">
            <set>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.125.128" />
                    <constructor-arg name="port" value="26379" />
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.125.129" />
                    <constructor-arg name="port" value="26379" />
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode ">
                    <constructor-arg name="host" value="192.168.125.130" />
                    <constructor-arg name="port" value="26379" />
                </bean>
            </set>
        </property>
    </bean>
    <bean id="redisConnectionFactory"
        class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
        p:password="pwdisadmin">
        <constructor-arg name="sentinelConfig" ref="redisSentinelConfiguration"></constructor-arg>
        <constructor-arg name="poolConfig" ref="jedisPoolConfig"></constructor-arg>
    </bean>
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
        <property name="connectionFactory" ref="redisConnectionFactory" />
    </bean>
</beans>

上面的p:password="pwdisadmin"指的是redis的密码，mymaster指的是redis哨兵中配置的名字。

然后再程序中就可以通过注解或者getBean获取redisTemplate的实例了。

public static void main(String[] args) {
        ConfigurableApplicationContext context = new ClassPathXmlApplicationContext(
                "classpath:conf/spring-redis-sentinel.xml");
        RedisTemplate<String, String> template = (RedisTemplate<String, String>) context.getBean("redisTemplate");
        template.opsForValue().set("aaa", "aaabbb");
        System.err.println(template.opsForValue().get("aaa"));
    }