一个简单的log4j2的redis appender ，依赖于Jedis (A simple log4j2 redis appender which uses Jedis)

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="info" name="sd" packages="org.greycode.sd.base.log">
    <Properties>
	    <Property name="logPattern">[%d{yyyy-MM-dd HH:mm:ss}] [%p] [%c] %m%n</Property>
	</Properties>
	<Appenders>
		<Console name="STDOUT" target="SYSTEM_OUT">
			<PatternLayout pattern="${logPattern}" />
		</Console>
	
		<NoSql name="redis">
		    <!-- <Redis host="localhost" port="" timeout="" password="" database="" clientName=""/> -->
			<Redis host="localhost" />
		</NoSql>
		
	</Appenders>
	<Loggers>
		<asyncRoot level="info" includeLocation="true">
			<AppenderRef ref="STDOUT" />
			<AppenderRef ref="redis" />
		</asyncRoot>
	</Loggers>
</Configuration>

pom.xml

    <!-- LOG begin -->
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-core</artifactId>
		<version>${log4j2.version}</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-jcl</artifactId>
		<version>${log4j2.version}</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-web</artifactId>
		<version>${log4j2.version}</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-slf4j-impl</artifactId>
		<version>${log4j2.version}</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-nosql</artifactId>
		<version>${log4j2.version}</version>
	</dependency>
	<!-- LOG end -->
		
	<dependency>
		<groupId>com.lmax</groupId>
		<artifactId>disruptor</artifactId>
		<version>${disruptor.version}</version>
	</dependency>	
	
	<dependency>
		<groupId>redis.clients</groupId>
		<artifactId>jedis</artifactId>
		<version>${jedis.version}</version>
	</dependency>

RedisConnection.java

package org.greycode.sd.base.log;

import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;

import org.apache.logging.log4j.core.appender.AppenderLoggingException;
import org.apache.logging.log4j.nosql.appender.DefaultNoSqlObject;
import org.apache.logging.log4j.nosql.appender.NoSqlConnection;
import org.apache.logging.log4j.nosql.appender.NoSqlObject;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

import com.fasterxml.jackson.databind.ObjectMapper;

public class RedisConnection implements NoSqlConnection<Map<String, Object>, DefaultNoSqlObject> {
	private static final ObjectMapper mapper = new ObjectMapper(); 
	
	private final JedisPool pool;
	private final Jedis jedis;
	private final AtomicBoolean closed = new AtomicBoolean(false);
	
	public RedisConnection (JedisPool pool) {
		this.jedis = pool.getResource();
		this.pool = pool;
	}
	
	@Override
	public DefaultNoSqlObject createObject() {
		return new DefaultNoSqlObject();
	}

	@Override
	public DefaultNoSqlObject[] createList(int length) {
		// TODO Auto-generated method stub
		return new DefaultNoSqlObject[length];
	}

	@Override
	public void insertObject(NoSqlObject<Map<String, Object>> object) {
		try {
			jedis.lpush("redis-log4j2", mapper.writeValueAsString(object.unwrap()));
		} catch (Exception e) {
			  throw new AppenderLoggingException("往Redis中插入数据时发生错误: " + e.getMessage(), e);
		}
	}

	@Override
	public void close() {
		if (closed.compareAndSet(false, true)) {
			this.pool.close();
		}
	}

	@Override
	public boolean isClosed() {
		return closed.get();
	}

}

RedisProvider.java

package org.greycode.sd.base.log;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.nosql.appender.NoSqlProvider;
import org.apache.logging.log4j.status.StatusLogger;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.Protocol;

@Plugin(name = "Redis", category = "Core", printObject = true)
public class RedisProvider implements NoSqlProvider<RedisConnection> {
	private static final Logger LOGGER = StatusLogger.getLogger();
	
	private final JedisPool pool;
	
	private RedisProvider (JedisPool pool) {
		this.pool = pool;
	}
	
	@PluginFactory
	public static RedisProvider createNoSqlProvider (
			@PluginAttribute("host") final String host,
			@PluginAttribute("port") int port,
			@PluginAttribute("timeout") int timeout,
			@PluginAttribute("password") final String password,
			@PluginAttribute("database") int database,
			@PluginAttribute("clientName") final String clientName
			) {
		if (host != null && host.length() > 0) {
			try {
				if (port <= 0) port = 6379;
				if (timeout <= 0) timeout = Protocol.DEFAULT_TIMEOUT;
				if (database <= 0) database = Protocol.DEFAULT_DATABASE;
				
				JedisPool pool = null;
				
				pool = new JedisPool(new JedisPoolConfig(), host, port, timeout, password, database, clientName);
				
				try (Jedis jedis = pool.getResource()) { }
				
				return new RedisProvider(pool);
			} catch (Exception e) {
				LOGGER.error("与Redis服务器建立连接时发生错误[{}:{}]：{}",e.getMessage(), host, port);
				return null;
			}
		}
		LOGGER.error("Redis 服务器地址[host]不能为空");
		return null;
	}
	
	@Override
	public RedisConnection getConnection() {
		return new RedisConnection(pool);
	}

}

Do not forget to: this.jedis.close(); after insertObject, give resource back to the pool.