简单说redis(下)

Bertha 。 2022-11-06 15:55 95阅读 0赞

我之前写过一篇[简单说redis(上),][redis]当初本来是要写下的,后来工作原因,忘了.现在重新补上.  
在这过程中出现了[yum报错问题][yum]

1.linux安装

1.下载
    wget http://download.redis.io/releases/redis-3.2.8.tar.gz
    2.解压
    
    tar -zxvf redis-3.2.8.tar.gz -C ../servers/
    3.安装c++
    yum -y install gcc-c++
    4.安装tcl
    yum  -y  install  tcl
    5.编译
    make
    编译完后测试
    make test
    6.修改配置
    //先创建两个目录
    mkdir -p /export/servers/redis-3.2.8/logs
    mkdir -p /export/servers/redis-3.2.8/redisdata
    //修改
    vim redis.conf
    //修改内容
    bind node-1
    daemonize yes
    pidfile /var/run/redis_6379.pid
    logfile "/export/servers/redis-3.2.8/logs/redis.log"
    dir /export/servers/redis-3.2.8/redisdata
    7.执行启动
    src/redis-server redis.conf
    8.连接
    src
    redis-cli -h node-1

2.java示例代码

package jedisDemo.cn.test;
    
    import java.util.List;
    import java.util.Map;
    import java.util.Set;
    
    import org.junit.After;
    import org.junit.Before;
    import org.junit.Test;
    
    import redis.clients.jedis.Jedis;
    import redis.clients.jedis.JedisPool;
    import redis.clients.jedis.JedisPoolConfig;
    
    public class JedisDemo1 { 
    
    	private JedisPool jedisPool;
    	private JedisPoolConfig config;
    
    	@Before
    	public void redisConnectionPool() { 
    		System.out.println("lianjie");
    
    		config = new JedisPoolConfig();
    		config.setMaxIdle(10);
    		config.setMaxWaitMillis(3000);
    		config.setMaxTotal(50);
    		config.setMinIdle(5);
    		jedisPool = new JedisPool(config, "node-1", 6379);
    
    	}
    
    	@After
    	public void closePool() { 
    		jedisPool.close();
    	}
    
    	// string
    	@Test
    	public void addStr() { 
    		Jedis jedis = jedisPool.getResource();
    		// 添加
    		jedis.set("key2", "helloworld");
    		// 查询
    		String value = jedis.get("key2");
    		System.out.println(value);
    		// 删除
    		jedis.del("key2");
    		// 整数型增长
    		jedis.set("inkey", "1");
    		jedis.incr("inkey");
    		System.out.println(jedis.get("inkey"));
    		jedis.incrBy("inkey", 3);
    		System.out.println(jedis.get("inkey"));
    
    	}
    
    	// hash
    	@Test
    	public void addHash() { 
    		Jedis jedis = jedisPool.getResource();
    		// 添加
    		jedis.hset("hashkey1", "field1", "jedisval1");
    		jedis.hset("hashkey1", "field2", "jedisval2");
    		// 获取
    		Map<String, String> hgetAll = jedis.hgetAll("hashkey1");
    		for (String field : hgetAll.keySet()) { 
    			System.out.println("field=" + field);
    			System.out.println("val=" + hgetAll.get(field));
    		}
    
    		// 修改
    		jedis.hset("hashkey1", "field2", "jedisval321");
    		Map<String, String> hgetAll2 = jedis.hgetAll("hashkey1");
    		for (String field : hgetAll2.keySet()) { 
    			System.out.println("field2=" + field);
    			System.out.println("val2=" + hgetAll2.get(field));
    		}
    
    		// 删除
    		jedis.del("hashkey1");
    		Map<String, String> hgetAll3 = jedis.hgetAll("hashkey1");
    		for (String field : hgetAll3.keySet()) { 
    			System.out.println("field3=" + field);
    			System.out.println("val3=" + hgetAll3.get(field));
    		}
    	}
    
    	// list
    	@Test
    	public void addList() { 
    		Jedis jedis = jedisPool.getResource();
    		// 从左插入
    		jedis.lpush("listKey1", "jedis1", "jedis2", "jedis3", "jedis2");
    		// 获取
    		List<String> listkey = jedis.lrange("listKey1", 0, -1);
    		for (String s : listkey) { 
    			System.out.println(s);
    		}
    		// 从左边弹出
    		String listkey2 = jedis.lpop("listKey1");
    		System.out.println("lpop=" + listkey2);
    	}
    
    	@Test
    	public void addSet() { 
    		Jedis jedis = jedisPool.getResource();
    		jedis.sadd("setKey1", "jedis1", "jedis2", "jedis3", "jedis2");
    		Set<String> set = jedis.smembers("setKey1");
    		for (String s : set) { 
    			System.out.println("set=" + s);
    		}
    		// 移除掉一个数据
    		jedis.srem("setKey1", "jedis3");
    
    		Set<String> set2 = jedis.smembers("setKey1");
    		for (String s : set2) { 
    			System.out.println("set2=" + s);
    		}
    	}
    
    }

3.主从复制  
安装

和前面一样
    修改配置vim redis.conf,将node-1改成node-2,node-3
    以及添加
    slaveof node-1 6379
    
    
    bind node-2
    daemonize yes
    pidfile /var/run/redis_6379.pid
    logfile "/export/servers/redis-3.2.8/logs/redis.log"
    dir /export/servers/redis-3.2.8/redisdata
    slaveof node-1 6379

Sentinel(哨兵)

1.修改哨兵配置文件
    vim sentinel.conf
    #修改bind配置，每台机器修改为自己对应的主机名
    bind node-1  
    #配置sentinel服务后台运行
    daemonize yes
    #修改三台机器监控的主节点，现在主节点是node服务器
    sentinel monitor mymaster node-1 6379 2
    
    #修改bind配置，每台机器修改为自己对应的主机名
    bind node-2  
    #配置sentinel服务后台运行
    daemonize yes
    #修改三台机器监控的主节点，现在主节点是node01服务器
    sentinel monitor mymaster node-1 6379 2
    
    #修改bind配置，每台机器修改为自己对应的主机名
    bind node-3  
    #配置sentinel服务后台运行
    daemonize yes
    #修改三台机器监控的主节点，现在主节点是node01服务器
    sentinel monitor mymaster node-1 6379 2
    
    
    启动
    src/redis-sentinel sentinel.conf

哨兵模式java代码

package jedisDemo.cn.test;
    
    import java.util.Arrays;
    import java.util.HashSet;
    
    import org.junit.Test;
    
    import redis.clients.jedis.Jedis;
    import redis.clients.jedis.JedisPool;
    import redis.clients.jedis.JedisPoolConfig;
    import redis.clients.jedis.JedisSentinelPool;
    
    public class SentinelDemo1 {
    
    	@Test
    	public void testSentinel() {
    		JedisPoolConfig config = new JedisPoolConfig();
    		config.setMaxIdle(10);
    		config.setMaxWaitMillis(3000);
    		config.setMaxTotal(30);
    		config.setMinIdle(5);
    		//哨兵信息
    		HashSet<String> sentinels = new HashSet<String>(Arrays.asList("node-1:26379","node-2:26379","node-3:26379"));
    		//创建连接池
    		JedisSentinelPool jsPool=new JedisSentinelPool("mymaster", sentinels,config);
    		//获取jedis
    		Jedis jedis = jsPool.getResource();
    		jedis.set("sentinelKey", "sentinelValue");
    		jedis.close();
    	}
    
    }

4.集群  
三主三从,需要六台虚拟机,不过资源有限,用一台模拟

1.解压
    tar -zxf redis-3.2.8.tar.gz -C /export/
    
    2.安装环境和编译
    yum -y install gcc-c++ tcl
    
    cd /export/redis-3.2.8
    make && make install
    
    3.创建redis不同实例的配置文件夹
    cd /export/redis-3.2.8
    mkdir -p /export/redis-3.2.8/clusters/7001
    mkdir -p /export/redis-3.2.8/clusters/7002
    mkdir -p /export/redis-3.2.8/clusters/7003
    mkdir -p /export/redis-3.2.8/clusters/7004
    mkdir -p /export/redis-3.2.8/clusters/7005
    mkdir -p /export/redis-3.2.8/clusters/7006
    
    4.修改配置文件
    mkdir -p /export/redis-3.2.8/logs
    mkdir -p /export/redis-3.2.8/redisdata/7001
    mkdir -p /export/redis-3.2.8/redisdata/7002
    mkdir -p /export/redis-3.2.8/redisdata/7003
    mkdir -p /export/redis-3.2.8/redisdata/7004
    mkdir -p /export/redis-3.2.8/redisdata/7005
    mkdir -p /export/redis-3.2.8/redisdata/7006
    
    第一个文件
    vim  /export/redis-3.2.8/redis.conf
    bind node-1
    port 7001
    cluster-enabled yes
    cluster-config-file nodes-7001.conf
    cluster-node-timeout 5000
    appendonly yes
    daemonize yes
    pidfile /var/run/redis_7001.pid
    logfile "/export/redis-3.2.8/logs/7001.log"
    dir /export/redis-3.2.8/redisdata/7001
    第二个到第六个,将第一个复制到7002-7006中,将7001改成7002-7006,这里推荐可以使用notepad工具进行修改
    cp /export/redis-3.2.8/redis.conf /export/redis-3.2.8/clusters/7002
    vim  /export/redis-3.2.8/clusters/7002/redis.conf
    
    5.启动
    cd /export/redis-3.2.8
    src/redis-server clusters/7001/redis.conf
    src/redis-server clusters/7002/redis.conf
    src/redis-server clusters/7003/redis.conf
    src/redis-server clusters/7004/redis.conf
    src/redis-server clusters/7005/redis.conf
    src/redis-server clusters/7006/redis.conf
    
    6.安装ruby运行环境
    yum install ruby
    yum install rubygems
    gem install redis
    在执行gem install redis可能报ruby版本低问题,进行升级
    cd /export/redis-3.2.8
    
    gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
    
    curl -sSL https://get.rvm.io | bash -s stable
    执行这条命令时,可能会报curl: (7) couldn't connect to host
    需要
    sudo vim /etc/hosts
    #绑定host
    199.232.28.133 raw.githubusercontent.com
    
    
    source /etc/profile.d/rvm.sh 
    
    rvm list known//查看可用版本
    rvm install 2.4.1 //安装想要的版本
    
    7.创建集群
    cd /export/redis-3.2.8
    gem install redis
    src/redis-trib.rb create --replicas 1 node-1:7001 node-1:7002 node-1:7003 node-1:7004 node-1:7005 node-1:7006
    
    如果出错,将 node-1换成p地址
    之后再执行,如果报already busy的话,
    src/redis-cli  -h node01 -c -p 7001
    输入cluster reset
      flushall
    7001-70066依次执行
    
    8.连接
    cd /export/redis-3.2.8
    src/redis-cli  -h node-1 -c -p 7001

java操作

package jedisDemo.cn.test;
    
    import java.io.IOException;
    import java.util.Arrays;
    import java.util.HashSet;
    import java.util.Set;
    
    import org.junit.Test;
    
    import redis.clients.jedis.HostAndPort;
    import redis.clients.jedis.Jedis;
    import redis.clients.jedis.JedisCluster;
    import redis.clients.jedis.JedisPool;
    import redis.clients.jedis.JedisPoolConfig;
    import redis.clients.jedis.JedisSentinelPool;
    
    public class SentinelDemo1 {
    
    	@Test
    	public void testSentinel() {
    		JedisPoolConfig config = new JedisPoolConfig();
    		config.setMaxIdle(10);
    		config.setMaxWaitMillis(3000);
    		config.setMaxTotal(30);
    		config.setMinIdle(5);
    		//哨兵信息
    		HashSet<String> sentinels = new HashSet<String>(Arrays.asList("node-1:26379","node-2:26379","node-3:26379"));
    		//创建连接池
    		JedisSentinelPool jsPool=new JedisSentinelPool("mymaster", sentinels,config);
    		//获取jedis
    		Jedis jedis = jsPool.getResource();
    		jedis.set("sentinelKey", "sentinelValue");
    		jedis.close();
    	}
    
    	
    	@Test
    	public void jedisClusterTest() throws IOException {
    	    Set<HostAndPort> portSet = new HashSet<HostAndPort>();
    	  
    	    portSet.add(new HostAndPort("node-1",7001));
    	    portSet.add(new HostAndPort("node-1",7002));
    	    portSet.add(new HostAndPort("node-1",7003));
    	    portSet.add(new HostAndPort("node-1",7004));
    	    portSet.add(new HostAndPort("node-1",7005));
    	    portSet.add(new HostAndPort("node-1",7006));
    	    JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
    	    jedisPoolConfig.setMaxIdle(10);
    	    jedisPoolConfig.setMaxWaitMillis(3000);
    	    jedisPoolConfig.setMaxTotal(30);
    	    jedisPoolConfig.setMinIdle(5);
    
    	    JedisCluster jedisCluster = new JedisCluster(portSet, jedisPoolConfig);
    
    	    jedisCluster.set("clusterTest","clustervalue");//这个值不一定在7001中,可能在7002或7003中
    	    
    	    String string = jedisCluster.get("clusterTest");
    	    System.out.println(string);
    	    jedisCluster.close();
    
    	}
    
    }

[redis]: https://blog.csdn.net/bushanyantanzhe/article/details/79485441
[yum]: https://blog.csdn.net/bushanyantanzhe/article/details/114603047