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Editor to share with you how spring boot integrates redis master-slave sentinel mode. I hope you will get something after reading this article. Let's discuss it together.

Springboot integrates redis master-slave sentinel one master, two slaves, three sentinel configurations

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. The host name of the monitor: mymaster

8. Attach the configuration of sentinel1

Port 26379sentinel monitor mymaster 127.0.0.1 6379 2sentinel down-after-milliseconds mymaster 5000sentinel parallel-syncs mymaster 1sentinel failover-timeout mymaster 15000 create a new spring boot project and add Redis dependencies

Engineering structure

As follows:

The pom file is as follows:

4.0.0 com.chhliu.springboot.redis springboot-redis 0.0.1-SNAPSHOT jar springboot-redis Demo project for Spring Boot redis org.springframework.boot spring-boot-starter-parent 1.4.3.RELEASE UTF-8 UTF-8 1.7 org.springframework.boot spring-boot-starter-data-redis org.springframework.boot Spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin modifies application.properties configuration file

The configuration file is added as follows:

# basic configuration of REDIS (RedisProperties) redis # database namespring.redis.database=0# server host1 is used on a stand-alone machine, corresponding to the ip#spring.redis.host=127.0.0.1 # server password password of the server. If it is not set, it can not be used on a stand-alone machine of # spring.redis.password=#connection port. Corresponding port number # spring.redis.port=6379# pool settings... Pool configuration spring.redis.pool.max-idle=8spring.redis.pool.min-idle=0spring.redis.pool.max-active=8spring.redis.pool.max-wait=-1# name of Redis server Sentinel listening Redis server name spring.redis.sentinel.master=mymaster# comma-separated list of host:port pairs Sentinel configuration list spring.redis.sentinel.nodes=127.0.0.1:26379127.0.0.1:26479127.0.0.1:26579 New Redis Service 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 / / the template,StringRedisTemplate of the operation string is a subset of RedisTemplate private StringRedisTemplate stringRedisTemplate; @ Autowired / / RedisTemplate, which can perform all operations private RedisTemplate 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);}}

The dependent vo is as follows:

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 / / omit getter,setter / * attention: * Details:TODO * @ author chhliu * creation time: 2017-1-18 2:24:39 * @ return * / @ Override public String toString () {return "Student [id=" + id + ", name=" + name + " Age= "+ age +", grade= "+ grade +"] " }} Test class 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) @ SpringBootTestpublic 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 ("first grade"); 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);}} Test results

Name:chhliu

Student [id=001, name=chhliu, age=28, grade= first grade]

Redis Sentinel Mode sentinel and springboot Integration

Redis's Sentinel mode is a highly available solution provided by the government, and the configuration is very simple.

Install Redis cluster

This article uses redis-5.0.5,redis to install in the / soft/redis directory, and you need to create a new / soft/redis/data directory

Master node configuration

Vim config/redis-6379.conf

# bind 127.0.0.1 port 6379protected-mode nodaemonize yespidfile "/ var/run/redis_6379.pid" dir "/ soft/redis/data" dbfilename "dump-6379.rdb" logfile "log-6379.log"

Configuration from Node 1

Vim config/redis-6380.conf

# bind 127.0.0.1port 6380protected-mode nodaemonize yespidfile "/ var/run/redis_6380.pid" dir "/ soft/redis/data" dbfilename "dump-6380.rdb" logfile "log-6380.log" replicaof 192.168.4.176 6379

Configuration from Node 2

Vim config/redis-6381.conf

# bind 127.0.0.1port 6381protected-mode nodaemonize yespidfile "/ var/run/redis_6381.pid" dir "/ soft/redis/data" dbfilename "dump-6381.rdb" logfile "log-6381.log" replicaof 192.168.4.176 6379

Configuration description

# bind 127.0.0.1 comment out this configuration so that other machines can connect to redis

Protected-mode no turns off the protected mode so that other machines can connect to the redis

Daemonize background mode starts

The redis-v5 version replaces the old slaveof directive with replicaof.

Start the three nodes and run them in the / soft/redis directory

Redis-server config/redis-6379.confredis-server config/redis-6380.confredis-server config/redis-6381.conf

Open the primary node client to see if the configuration is successful

Redis-cli-p 6379info replication

Configure three more sentinels to monitor the cluster

Sentinel node 1

Vim config/redis-sentinel-26379.conf

Port 26379daemonize yespidfile "/ var/run/redis-sentinel-26379.pid" dir / tmplogfile "log-sentinel-26379.log" sentinel monitor mymaster 192.168.4.176 6379 2sentinel down-after-milliseconds mymaster 30000sentinel parallel-syncs mymaster 1sentinel failover-timeout mymaster 180000sentinel deny-scripts-reconfig yes

Sentinel Node 2

Vim config/redis-sentinel-26380.conf

Port 26380daemonize yespidfile "/ var/run/redis-sentinel-26380.pid" dir / tmplogfile "log-sentinel-26380.log" sentinel monitor mymaster 192.168.4.176 6379 2sentinel down-after-milliseconds mymaster 30000sentinel parallel-syncs mymaster 1sentinel failover-timeout mymaster 180000sentinel deny-scripts-reconfig yes

Sentinel node 3

Vim config/redis-sentinel-26381.conf

Port 26381daemonize yespidfile "/ var/run/redis-sentinel-26381.pid" dir / tmplogfile "log-sentinel-26381.log" sentinel monitor mymaster 192.168.4.176 6379 2sentinel down-after-milliseconds mymaster 30000sentinel parallel-syncs mymaster 1sentinel failover-timeout mymaster 180000sentinel deny-scripts-reconfig yes

Configuration description

Monitor mymaster 192.168.4.176 6379 2

Mymaster is the name of master, and 192.168.4.176 is the master host ip. The last 2 means that two sentinel think master is offline, and offline master is recommended to set the number of sentinel nodes / 2 + 1.

Down-after-milliseconds

If a ping request is sent to a redis node and no reply is received within a specified period of time, the node should be taken offline.

Parallel-syncs

When performing a failover, how many slaves can synchronize the new master server at the same time.

Activate the sentinel.

Redis-sentinel config/redis-sentinel-26379.confredis-sentinel config/redis-sentinel-26380.confredis-sentinel config/redis-sentinel-26381.conf

Configure spring-boot

Import dependencies in pom.xml

Org.springframework.boot spring-boot-starter-data-redis

Application.properties joins two-line configuration

# Sentinel mode cannot be configured with the following two lines. For other configurations, you can add # spring.redis.host=192.168.4.176# spring.redis.port=6379 spring.redis.sentinel.master=mymasterspring.redis.sentinel.nodes=192.168.4.176:26379, 192.168.4.176VR 26380, 192.168.4.176VR 26381

Write a test class to run

@ RunWith (SpringRunner.class) @ SpringBootTestpublic class Sentinel001 {@ Autowired RedisTemplate redisTemplate; @ Testpublic 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)) }

Then kill the process of the master instance (redis with port number 6379)

Ps-ef | grep rediskill-9 11110

Observe the output of the code editor console. After a short period of time (about 50s), the program runs normally again.

Execute info replication on 6380 and 6381 nodes and find that 6381 becomes the primary node

View the configuration files of 6380 and 6381 below

Cat config/redis-6380.confreplicaof 192.168.4.176 6381replicaof has become 192.168.4.176 6381 instead of the 192.168.4.176 6379cat config/redis-6381.conf replicaof configuration that was deleted at the beginning of the configuration.

Restart the 6379 redis instance

Redis-server config/redis-6379.conf

6379 becomes the slave node of 6381.

There is a rather silly thing, RedisTemplate does not achieve the separation of read and write, read and write is to operate the master node. Run the above code and run monitor on three redis clients and find that only master runs the get and set commands, and only the slave node runs the set command.

After reading this article, I believe you have a certain understanding of "how spring boot integrates redis master-slave sentinel mode". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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