使用Docker配置redis sentinel哨兵的方法步驟
本文演示一主二從。
先說一下遇到的問題。我看網(wǎng)上說想配置哨兵，必須讓啟動(dòng)redis的docker網(wǎng)絡(luò)模式為host，否則無法訪問到從還是什么的。我指定--network host后無法外網(wǎng)訪問，redis desktop manager連不上redis了，后來發(fā)現(xiàn)我這個(gè)新克隆的機(jī)器沒關(guān)防火墻，關(guān)上就好了。
1.配置主從
docker pull一下redis
master
mkdir -p /mydata/redis/6379/conf mkdir -p /mydata/redis/6379/data touch /mydata/redis/6379/conf/redis.conf echo "appendonly yes" >> /mydata/redis/6379/conf/redis.conf docker run --network host --name redis6379 -v /mydata/redis/6379/data:/data -v /mydata/redis/6379/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6379
slave
#slave1 mkdir -p /mydata/redis/6380/conf mkdir -p /mydata/redis/6380/data touch /mydata/redis/6380/conf/redis.conf echo "appendonly yes" >> /mydata/redis/6380/conf/redis.conf docker run --network host --name redis6380 -v /mydata/redis/6380/data:/data -v /mydata/redis/6380/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6380 --slaveof 192.168.243.4 6379 #slave2 mkdir -p /mydata/redis/6381/conf mkdir -p /mydata/redis/6381/data touch /mydata/redis/6381/conf/redis.conf echo "appendonly yes" >> /mydata/redis/6381/conf/redis.conf docker run --network host --name redis6381 -v /mydata/redis/6381/data:/data -v /mydata/redis/6381/conf/redis.conf:/etc/redis/redis.conf -d redis redis-server /etc/redis/redis.conf --port 6381 --slaveof 192.168.243.4 6379
查看配置：
#主 docker exec -it redis6379 redis-cli >info replication #從 docker exec -it redis6380 redis-cli -p 6380 >info replication
2. 配置哨兵
master
mkdir /mydata/redis/6379/sentinel
mkdir /mydata/redis/6379/sentinel/log
vi /mydata/redis/6379/sentinel/sentinel.conf
#輸入
port 26379
dir "/var/log/sentinel"
logfile "/var/log/sentinel/26379.log"
sentinel monitor mymaster 192.168.243.4 6379 1 #這里暫時(shí)設(shè)置成1
#方便看一下主掛掉是什么效果
sentinel down-after-milliseconds mymaster 5000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
#end
docker run -d --name sentinel26379 -v /mydata/redis/6379/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6379/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf
先進(jìn)行測試：
docker exec -it redis6379 redis-cli > SHUTDOWN > exit cat /mydata/redis/6379/sentinel/log/26379.log
此時(shí)redis6381已成為新的master
再啟動(dòng)docker start redis6379 6379是slave了
測試成功，修改上面配置文件的sentinel monitor mymaster 192.168.243.4 6379 2 數(shù)字配置為2，代表至少有2個(gè)Sentinel節(jié)點(diǎn)認(rèn)為主節(jié)點(diǎn)不可達(dá)，那么這個(gè)不可達(dá)的判定才是客觀的。為了防止票數(shù)相同，sentinel啟動(dòng)奇數(shù)個(gè)。
slave
#slave1 mkdir /mydata/redis/6380/sentinel mkdir /mydata/redis/6380/sentinel/log vi /mydata/redis/6380/sentinel/sentinel.conf #輸入 port 26380 dir "/var/log/sentinel" logfile "/var/log/sentinel/26380.log" sentinel monitor mymaster 192.168.243.4 6380 2 sentinel down-after-milliseconds mymaster 5000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000 #end docker run -d --name sentinel26380 -v /mydata/redis/6380/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6380/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf #slave2 mkdir /mydata/redis/6381/sentinel mkdir /mydata/redis/6381/sentinel/log vi /mydata/redis/6381/sentinel/sentinel.conf #輸入 port 26381 dir "/var/log/sentinel" logfile "/var/log/sentinel/26381.log" sentinel monitor mymaster 192.168.243.4 6381 2 sentinel down-after-milliseconds mymaster 5000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 180000 #end docker run -d --name sentinel26381 -v /mydata/redis/6381/sentinel/sentinel.conf:/conf/sentinel.conf -v /mydata/redis/6381/sentinel/log:/var/log/sentinel --network host redis redis-sentinel /conf/sentinel.conf
3.SpringBoot連接
application.yml
spring:
redis:
timeout: 5000
sentinel:
master: mymaster
nodes: 192.168.243.4:26379,192.168.243.4:26380,192.168.243.4:26381
controller
@Autowired
private StringRedisTemplate redisTemplate;
@RequestMapping("/redis")
public String redis() {
redisTemplate.opsForValue().set("test", "121323123");
String test = redisTemplate.opsForValue().get("test");
return "RESULT: " + test;
}
訪問localhost:8080/redis
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