redis 主從備份及其主備切換的操作

sentinel monitor MyMaster 127.0.0.1 6381 1
sentinel down-after-milliseconds MyMaster 5000
sentinel failover-timeout MyMaster 900000
sentinel parallel-syncs MyMaster 2

  啟動(dòng)redis-server
    # ./src/redis-server redis.conf 
    啟動(dòng)redis-sentinel
    # ./src/redis-sentinelsentinel-test.conf 

spring.redis.cluster.nodes=${redis.nodes}
spring.redis.password=${redis.pass}
spring.redis.timeout=60000
# 最大重定向次數(shù)
spring.redis.cluster.max-redirects=3
spring.redis.lettuce.pool.max-active=64
spring.redis.lettuce.pool.max-idle=16
spring.redis.lettuce.pool.min-idle=0
spring.redis.lettuce.pool.max-wait=60000ms
spring.redis.lettuce.shutdown-timeout=100ms

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.lettuce.core.cluster.ClusterClientOptions;
import io.lettuce.core.cluster.ClusterTopologyRefreshOptions;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisClusterConfiguration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisNode;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.time.Duration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
@Configuration
public class RedisConfig {
    @Autowired
    private RedisProperties redisProperties;
    @Bean
    @SuppressWarnings("all")
    public RedisTemplateString, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplateString, Object> template = new RedisTemplateString, Object>();
        template.setConnectionFactory(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        // key采用String的序列化方式
        template.setKeySerializer(stringRedisSerializer);
        // hash的key也采用String的序列化方式
        template.setHashKeySerializer(stringRedisSerializer);
        // value序列化方式采用jackson
        template.setValueSerializer(jackson2JsonRedisSerializer);
        // hash的value序列化方式采用jackson
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
    /**
     * 為RedisTemplate配置Redis連接工廠實(shí)現(xiàn)
     * LettuceConnectionFactory實(shí)現(xiàn)了RedisConnectionFactory接口
     * 這里要注意的是，在構(gòu)建LettuceConnectionFactory 時(shí)，如果不使用內(nèi)置的destroyMethod，可能會(huì)導(dǎo)致Redis連接早于其它Bean被銷毀
     *
     * @return 返回LettuceConnectionFactory
     */
    @Bean(destroyMethod = "destroy")
    public LettuceConnectionFactory lettuceConnectionFactory() {
        ListString> clusterNodes = redisProperties.getCluster().getNodes();
        SetRedisNode> nodes = new HashSet>();
        clusterNodes.forEach(address -> nodes.add(new RedisNode(address.split(":")[0].trim(), Integer.parseInt(address.split(":")[1]))));
        RedisClusterConfiguration clusterConfiguration = new RedisClusterConfiguration();
        clusterConfiguration.setClusterNodes(nodes);
        clusterConfiguration.setPassword(RedisPassword.of(redisProperties.getPassword()));
        clusterConfiguration.setMaxRedirects(redisProperties.getCluster().getMaxRedirects());
        GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
        poolConfig.setMaxIdle(redisProperties.getLettuce().getPool().getMaxIdle());
        poolConfig.setMinIdle(redisProperties.getLettuce().getPool().getMinIdle());
        poolConfig.setMaxTotal(redisProperties.getLettuce().getPool().getMaxActive());
        return new LettuceConnectionFactory(clusterConfiguration, getLettuceClientConfiguration(poolConfig));
    }
    /**
     * 配置LettuceClientConfiguration 開啟自適應(yīng)刷新拓?fù)?包括線程池配置和安全項(xiàng)配置
     *
     * @param genericObjectPoolConfig common-pool2線程池
     * @return lettuceClientConfiguration
     */
    private LettuceClientConfiguration getLettuceClientConfiguration(GenericObjectPoolConfig genericObjectPoolConfig) {
        /*
        ClusterTopologyRefreshOptions配置用于開啟自適應(yīng)刷新和定時(shí)刷新。如自適應(yīng)刷新不開啟，Redis集群變更時(shí)將會(huì)導(dǎo)致連接異常！
         */
        ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()
                //開啟自適應(yīng)刷新
                //.enableAdaptiveRefreshTrigger(ClusterTopologyRefreshOptions.RefreshTrigger.MOVED_REDIRECT, ClusterTopologyRefreshOptions.RefreshTrigger.PERSISTENT_RECONNECTS)
                //開啟所有自適應(yīng)刷新，MOVED，ASK，PERSISTENT都會(huì)觸發(fā)
                .enableAllAdaptiveRefreshTriggers()
                // 自適應(yīng)刷新超時(shí)時(shí)間(默認(rèn)30秒)
                .adaptiveRefreshTriggersTimeout(Duration.ofSeconds(25)) //默認(rèn)關(guān)閉開啟后時(shí)間為30秒
                // 開周期刷新
                .enablePeriodicRefresh(Duration.ofSeconds(20))  // 默認(rèn)關(guān)閉開啟后時(shí)間為60秒 ClusterTopologyRefreshOptions.DEFAULT_REFRESH_PERIOD 60  .enablePeriodicRefresh(Duration.ofSeconds(2)) = .enablePeriodicRefresh().refreshPeriod(Duration.ofSeconds(2))
                .build();
        return LettucePoolingClientConfiguration.builder()
                .poolConfig(genericObjectPoolConfig)
                .clientOptions(ClusterClientOptions.builder().topologyRefreshOptions(topologyRefreshOptions).build())
                .build();
    }
}