前提:
#本文是在确保redis集群配置正确的情况下,连接超时的解决方案。
项目登录认证使用的是sa-token(这个不重要,主要说的是springboot和redis集群),最近应甲方要求,需要做redis集群,在测试主从切换的时候发现,redis的master虽然切换过来了,但是springboot连接redis还是请求的之前宕掉的节点ip,没有更新过来。
原因:
SpringBoot2.X版本开始Redis默认的连接池都是采用的Lettuce。当节点发生改变后,Letture默认是不会刷新节点拓扑的,需要手动去刷新。
解决方案:
【redis|springboot整合redis集群master宕机后连接超时】方案一、把lettuce换成jedis(我用的这个,亲测好使)
#切换jedis有个问题,就是在master宕机,cluster升为master期间,15秒内还是会报连接超时,15秒后项目正常了,项目流量大的慎用。
org.springframework.boot
spring-boot-starter-data-redis
2.1.5.RELEASE
io.lettuce
lettuce-core
redis.clients
jedis
3.1.0-m4
方案二:(这个是网上摘得,没有做测试,各位大佬有时间可以试试)
@Autowired
private RedisProperties redisProperties;
@Bean
public GenericObjectPoolConfig> genericObjectPoolConfig(Pool properties) {
GenericObjectPoolConfig> config = new GenericObjectPoolConfig<>();
config.setMaxTotal(properties.getMaxActive());
config.setMaxIdle(properties.getMaxIdle());
config.setMinIdle(properties.getMinIdle());
if (properties.getTimeBetweenEvictionRuns() != null) {
config.setTimeBetweenEvictionRunsMillis(properties.getTimeBetweenEvictionRuns().toMillis());
}
if (properties.getMaxWait() != null) {
config.setMaxWaitMillis(properties.getMaxWait().toMillis());
}
return config;
}
@Bean(destroyMethod = "destroy")
public LettuceConnectionFactory lettuceConnectionFactory() {//开启 自适应集群拓扑刷新和周期拓扑刷新
ClusterTopologyRefreshOptions clusterTopologyRefreshOptions =ClusterTopologyRefreshOptions.builder()
// 开启全部自适应刷新
.enableAllAdaptiveRefreshTriggers() // 开启自适应刷新,自适应刷新不开启,Redis集群变更时将会导致连接异常
// 自适应刷新超时时间(默认30秒)
.adaptiveRefreshTriggersTimeout(Duration.ofSeconds(30)) //默认关闭开启后时间为30秒
// 开周期刷新
.enablePeriodicRefresh(Duration.ofSeconds(20))// 默认关闭开启后时间为60秒 ClusterTopologyRefreshOptions.DEFAULT_REFRESH_PERIOD 60.enablePeriodicRefresh(Duration.ofSeconds(2)) = .enablePeriodicRefresh().refreshPeriod(Duration.ofSeconds(2))
.build();
// https://github.com/lettuce-io/lettuce-core/wiki/Client-Options
ClientOptions clientOptions = ClusterClientOptions.builder()
.topologyRefreshOptions(clusterTopologyRefreshOptions)
.build();
LettuceClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()
.poolConfig(genericObjectPoolConfig(redisProperties.getLettuce().getPool()))
//.readFrom(ReadFrom.MASTER_PREFERRED)
.clientOptions(clientOptions)
.commandTimeout(redisProperties.getTimeout()) //默认RedisURI.DEFAULT_TIMEOUT 60
.build();
List clusterNodes = redisProperties.getCluster().getNodes();
Set nodes = new HashSet();
clusterNodes.forEach(address -> nodes.add(new RedisNode(address.split(":")[0].trim(), Integer.valueOf(address.split(":")[1]))));
RedisClusterConfiguration clusterConfiguration = new RedisClusterConfiguration();
clusterConfiguration.setClusterNodes(nodes);
clusterConfiguration.setPassword(RedisPassword.of(redisProperties.getPassword()));
clusterConfiguration.setMaxRedirects(redisProperties.getCluster().getMaxRedirects());
LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(clusterConfiguration, clientConfig);
// lettuceConnectionFactory.setShareNativeConnection(false);
//是否允许多个线程操作共用同一个缓存连接,默认true,false时每个操作都将开辟新的连接
// lettuceConnectionFactory.resetConnection();
// 重置底层共享连接, 在接下来的访问时初始化
return lettuceConnectionFactory;
}
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