实现cas ticket基于redis的集群

目的

克服cas单点故障,将cas认证请求分发到多台cas服务器上,降低负载。

实现思路:

采用统一的ticket存取策略,所有ticket的操作都从中央缓存redis中存取。
采用session共享,session的存取都从中央缓存redis中存取。

前提:

这里只讲解如何实现cas ticket的共享,关于session的共享请移步:

实现步骤:

1. 添加相关依赖

maven:

 <repositories>
 <repository>
 <id>jitpack.io</id>
 <url>https://jitpack.io</url>
 </repository>
 </repositories>

 <dependency>
	 <groupId>com.github.izerui</groupId>
	 <artifactId>cas-server-integration-redis</artifactId>
	 <version>1.1.1-RELEASE</version>
	</dependency>

gradle:

 allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

 dependencies {
	 compile 'com.github.izerui:cas-server-integration-redis:1.1.1-RELEASE'
	}

2. 替换默认的ticket存取策略

cas 4.1.x 以前版本

<bean id="ticketRegistry" class="org.jasig.cas.ticket.registry.DefaultTicketRegistry" />

<bean id="ticketRegistry" class="ren.boot.cas.ticket.registry.RedisTicketRegistry">
 <constructor-arg index="0" ref="redisTemplate" />
 <!-- TGT timeout in seconds -->
 <constructor-arg index="1" value="1800" />
 <!-- ST timeout in seconds -->
 <constructor-arg index="2" value="300" />
</bean>
<!-- redis连接池 -->
<bean id="jedisConnFactory"
 class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
 p:hostName="192.168.1.89"
 p:database="0"
 p:usePool="true"/>
<bean id="redisTemplate" class="org.jasig.cas.ticket.registry.TicketRedisTemplate"
 p:connectionFactory-ref="jedisConnFactory"/>

cas 4.2.x :

<!-- 票据保存方式及有效期设置 -->
<alias name="redisTicketRegistry" alias="ticketRegistry" />
<bean id="redisTicketRegistry" class="ren.boot.cas.ticket.registry.RedisTicketRegistry"
 p:client-ref="ticketRedisTemplate"
 p:tgtTimeout="28800"
 p:stTimeout="10"/>
<!-- redis连接池 -->
<bean id="jedisConnFactory"
 class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
 p:hostName="localhost"
 p:database="0"
 p:usePool="true"/>
<bean id="ticketRedisTemplate" class="ren.boot.cas.ticket.registry.TicketRedisTemplate"
 p:connectionFactory-ref="jedisConnFactory"/>