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小編給大家分享一下spring boot如何整合redis主從sentinel方式,希望大家閱讀完這篇文章之后都有所收獲,下面讓我們一起去探討吧!
1、master:127.0.0.1:6379
2、slave1:127.0.0.1:6380
3、slave2:127.0.0.1:6381
4、sentinel1:127.0.0.1:26379
5、sentinel2:127.0.0.1:26479
6、sentinel3:127.0.0.1:26579
7、監聽的主機名:mymaster
8、附上sentinel1的配置
port 26379 sentinel monitor mymaster 127.0.0.1 6379 2 sentinel down-after-milliseconds mymaster 5000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 15000
如下:
pom文件如下:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.chhliu.springboot.redis</groupId> <artifactId>springboot-redis</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot-redis</name> <description>Demo project for Spring Boot redis</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.7</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
配置文件添加內容如下:
######################################################## ###REDIS (RedisProperties) redis基本配置; ######################################################## # database name spring.redis.database=0 # server host1 單機使用,對應服務器ip #spring.redis.host=127.0.0.1 # server password 密碼,如果沒有設置可不配 #spring.redis.password= #connection port 單機使用,對應端口號 #spring.redis.port=6379 # pool settings ...池配置 spring.redis.pool.max-idle=8 spring.redis.pool.min-idle=0 spring.redis.pool.max-active=8 spring.redis.pool.max-wait=-1 # name of Redis server 哨兵監聽的Redis server的名稱 spring.redis.sentinel.master=mymaster # comma-separated list of host:port pairs 哨兵的配置列表 spring.redis.sentinel.nodes=127.0.0.1:26379,127.0.0.1:26479,127.0.0.1:26579
package com.chhliu.springboot.redis; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.stereotype.Service; @Service("redisService") public class RedisService { @Autowired //操作字符串的template,StringRedisTemplate是RedisTemplate的一個子集 private StringRedisTemplate stringRedisTemplate; @Autowired // RedisTemplate,可以進行所有的操作 private RedisTemplate<Object,Object> redisTemplate; public void set(String key, String value){ stringRedisTemplate.opsForValue().set(key, value); } public void set(Student s){ redisTemplate.opsForValue().set(s.getId(), s); } public String get(String key){ return stringRedisTemplate.opsForValue().get(key); } public Student getStudent(String key){ return (Student) redisTemplate.opsForValue().get(key); } }
依賴的vo如下:
package com.chhliu.springboot.redis; import java.io.Serializable; public class Student implements Serializable{ /** * */ private static final long serialVersionUID = 1L; private String id; private String name; private String age; private String grade; // 省略getter,setter /** * attention: * Details:TODO * @author chhliu * 創建時間:2017-1-18 下午2:24:39 * @return */ @Override public String toString() { return "Student [id=" + id + ", name=" + name + ", age=" + age + ", grade=" + grade + "]"; } }
package com.chhliu.springboot.redis; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest public class SpringbootRedisApplicationTests { @Autowired private RedisService service; @Test public void contextLoads() { service.set("myname", "chhliu"); Student s = new Student(); s.setId("001"); s.setName("chhliu"); s.setGrade("一年級"); s.setAge("28"); service.set(s); String name = service.get("myname"); System.out.println("name:"+name); Student stu = service.getStudent("001"); System.out.println(stu); } }
name:chhliu
Student [id=001, name=chhliu, age=28, grade=一年級]
Redis的哨兵模式是官方提供的一種高可用解決方案,而且配置非常簡單。
本文使用redis-5.0.5,redis安裝在/soft/redis目錄下,需新建/soft/redis/data目錄
主節點配置
vim config/redis-6379.conf
# bind 127.0.0.1 port 6379 protected-mode no daemonize yes pidfile "/var/run/redis_6379.pid" dir "/soft/redis/data" dbfilename "dump-6379.rdb" logfile "log-6379.log"
從節點1配置
vim config/redis-6380.conf
# bind 127.0.0.1 port 6380 protected-mode no daemonize yes pidfile "/var/run/redis_6380.pid" dir "/soft/redis/data" dbfilename "dump-6380.rdb" logfile "log-6380.log" replicaof 192.168.4.176 6379
從節點2配置
vim config/redis-6381.conf
# bind 127.0.0.1 port 6381 protected-mode no daemonize yes pidfile "/var/run/redis_6381.pid" dir "/soft/redis/data" dbfilename "dump-6381.rdb" logfile "log-6381.log" replicaof 192.168.4.176 6379
配置說明
# bind 127.0.0.1 注釋掉這配置,以便其他機器的能連接redis
protected-mode no 關閉保護模式,以便其他機器的能連接redis
daemonize后臺模式啟動
redis-v5版本使用replicaof替換舊的slaveof指令。
啟動這3個節點,在/soft/redis目錄下運行
redis-server config/redis-6379.conf redis-server config/redis-6380.conf redis-server config/redis-6381.conf
打開主節點客戶端看看配置是否成功
redis-cli -p 6379 info replication
再配置3個哨兵,監控集群
哨兵節點1
vim config/redis-sentinel-26379.conf
port 26379 daemonize yes pidfile "/var/run/redis-sentinel-26379.pid" dir /tmp logfile "log-sentinel-26379.log" sentinel monitor mymaster 192.168.4.176 6379 2 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000 sentinel deny-scripts-reconfig yes
哨兵節點2
vim config/redis-sentinel-26380.conf
port 26380 daemonize yes pidfile "/var/run/redis-sentinel-26380.pid" dir /tmp logfile "log-sentinel-26380.log" sentinel monitor mymaster 192.168.4.176 6379 2 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000 sentinel deny-scripts-reconfig yes
哨兵節點3
vim config/redis-sentinel-26381.conf
port 26381 daemonize yes pidfile "/var/run/redis-sentinel-26381.pid" dir /tmp logfile "log-sentinel-26381.log" sentinel monitor mymaster 192.168.4.176 6379 2 sentinel down-after-milliseconds mymaster 30000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000 sentinel deny-scripts-reconfig yes
配置說明
monitor mymaster 192.168.4.176 6379 2
mymaster是master的名稱,192.168.4.176是master主機ip。后面的2表示有2個sentinel認為master下線了,則線下master,建議設置為 sentinel節點數/2 + 1
down-after-milliseconds
發送ping請求給redis節點,在指定時間內未收到回復,則認為該節點應該被下線
parallel-syncs
在執行故障轉移時,最多可以有多少個從節點同時對新的主服務器進行同步。
啟動哨兵
redis-sentinel config/redis-sentinel-26379.conf redis-sentinel config/redis-sentinel-26380.conf redis-sentinel config/redis-sentinel-26381.conf
配置spring-boot
pom.xml中導入依賴
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>
application.properties加入兩行配置
# 使用哨兵模式不能加以下兩行配置,其他配置可以加 # spring.redis.host=192.168.4.176 # spring.redis.port=6379 spring.redis.sentinel.master=mymaster spring.redis.sentinel.nodes=192.168.4.176:26379, 192.168.4.176:26380, 192.168.4.176:26381
寫一個測試類運行
@RunWith(SpringRunner.class) @SpringBootTest public class Sentinel001 { @Autowired RedisTemplate redisTemplate; @Test public void test001() throws Exception{ while (true){ String key = "time:" + new Date().getTime(); redisTemplate.opsForValue().set(key, new Date().getTime()); TimeUnit.MILLISECONDS.sleep(100L); System.out.println(redisTemplate.opsForValue().get(key)); } } }
然后殺掉master實例(端口號為6379的redis)的進程
ps -ef|grep redis kill -9 11110
觀察代碼編輯器控制臺輸出,經過短暫的時間(大概是50s)后,程序重新運行正常
在6380和6381節點執行info replication,發現6381變成了主節點
查看下6380、6381的配置文件
cat config/redis-6380.conf replicaof 192.168.4.176 6381 replicaof 變成了192.168.4.176 6381,而不是剛開始配置時的192.168.4.176 6379 cat config/redis-6381.conf replicaof 的配置被刪除了
重啟下6379這個redis實例
redis-server config/redis-6379.conf
6379變成了6381的從節點
有個比較坑爹的事情,RedisTemplate未實現讀寫分離,讀寫都是操作master節點。運行上面的代碼,在3個redis客戶端運行monitor發現,只有master會運行get、set命令,從節點只運行了set命令。
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