參考博客

docker-compose部署：
https://www.cnblogs.com/boshen-hzb/p/10471665.html
普通部署：
https://www.cnblogs.com/kevingrace/p/9004460.html

使用docker-compose部署

redis-sentinel # 項目根路徑├── docker-compose.yml # docker-compose文件└── sentinel # 存放初始化sentinel容器的相關文件├── Dockerfile # sentinel構建鏡像文件├── sentinel.conf # sentinel配置文件└── sentinel-entrypoint.sh # sentinel.sh啟動腳本

redis-sentinel/docker-compose.yml

master:image: rediscommand: redis-server --port 6379 --requirepass 123456 --masterauth 123456ports:- "6379:6379" slave1:image: rediscommand: redis-server --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456links:- master:redis-masterports:- "6380:6379" slave2:image: rediscommand: redis-server --slaveof redis-master 6379 --requirepass 123456 --masterauth 123456links:- master:redis-masterports:- "6381:6379" sentinel1:build: sentinelenvironment:- SENTINEL_DOWN_AFTER=5000- SENTINEL_FAILOVER=5000 links:- master:redis-master- slave1ports:- "26379:26379" sentinel2:build: sentinelenvironment:- SENTINEL_DOWN_AFTER=5000- SENTINEL_FAILOVER=5000 links:- master:redis-master- slave2ports:- "26380:26379"

redis-sentinel/sentinel/Dockerfile

FROM redisEXPOSE 26379 ADD sentinel.conf /etc/redis/sentinel.conf RUN chown redis:redis /etc/redis/sentinel.conf COPY sentinel-entrypoint.sh /usr/local/bin/ RUN chmod +x /usr/local/bin/sentinel-entrypoint.sh ENTRYPOINT ["sentinel-entrypoint.sh"]

redis-sentinel/sentinel/sentinel.conf

port 26379 protected-mode no sentinel monitor mymaster redis-master 6379 2 sentinel down-after-milliseconds mymaster 5000 sentinel parallel-syncs mymaster 1 sentinel failover-timeout mymaster 5000

sentinel-entrypoint.sh

#!/bin/shsed -i "s/$SENTINEL_QUORUM/$SENTINEL_QUORUM/g" /etc/redis/sentinel.conf sed -i "s/$SENTINEL_DOWN_AFTER/$SENTINEL_DOWN_AFTER/g" /etc/redis/sentinel.conf sed -i "s/$SENTINEL_FAILOVER/$SENTINEL_FAILOVER/g" /etc/redis/sentinel.confexec docker-entrypoint.sh redis-server /etc/redis/sentinel.conf --sentinel

運行下面的命令

[root@linux-node4 redis-sentinel]# cd redis-sentinel/ # 進入項目根路徑 [root@linux-node4 redis-sentinel]# docker-compose up --force-recreate # 使用docker-compose啟動項目 [root@linux-node4 redis-sentinel]# docker rm -f $(docker ps -a | grep redis | awk '{print $1}') # 刪除所有redis相關的docker容器

集群圖解與測試

redis-cli -h 127.0.0.1 -p 26379 連接sentinel查看集群信息

[root@linux-node4 redis-sentinel]# redis-cli -h 127.0.0.1 -p 26379 [root@linux-node4 redis-sentinel]# redis-cli -h 127.0.0.1 -p 26380 127.0.0.1:26379> info # Server redis_version:5.0.7 redis_mode:sentinel os:Linux 3.10.0-957.1.3.el7.x86_64 x86_64 tcp_port:26379 executable:/data/redis-server config_file:/etc/redis/sentinel.conf# Clients connected_clients:2 client_recent_max_input_buffer:2 client_recent_max_output_buffer:0 blocked_clients:0# Sentinel sentinel_masters:1 sentinel_tilt:0 sentinel_running_scripts:0 sentinel_scripts_queue_length:0 sentinel_simulate_failure_flags:0 master0:name=mymaster,status=ok,address=172.17.0.2:6379,slaves=2,sentinels=2 127.0.0.1:26379>

redis-master上可以寫入和讀取，但是slave只能讀取不能寫入

# master上可以寫入和讀取，但是slave只能讀取不能寫入 '''打開一個新終端在redis-master寫入數據 ''' [root@linux-node4 redis-sentinel]# redis-cli -h 127.0.0.1 -p 6379 127.0.0.1:6379> set test01 master6379 OK 127.0.0.1:6379> '''打開第二個新終端在redis-slave可以查看master中寫入的值但是salve自己不能寫數據 ''' [root@linux-node4 ~]# redis-cli -h 127.0.0.1 -p 6380 127.0.0.1:6380> get test01 # slave可以查看到master寫入的數據 "master6379" 127.0.0.1:6380> set test02 redis6380 # salve自己無法寫入數據 (error) READONLY You can't write against a read only replica.

停止redis-master模擬鼓掌切換

[root@linux-node4 redis-sentinel]# docker stop redis-sentinel_master_1 # 停止redis-master模擬故障 redis-sentinel_master_1 [root@linux-node4 redis-sentinel]# docker ps | grep redis # 確定master已經停止 88d270dad925 redis-sentinel_sentinel2 redis-sentinel_sentinel2_1 307c9c7907e0 redis-sentinel_sentinel1 redis-sentinel_sentinel1_1 2ed5dbfff01d redis redis-sentinel_slave1_1 ca3b568d0b19 redis redis-sentinel_slave2_1[root@linux-node4 redis-sentinel]# redis-cli -p 26379 # 連接sentinel，發現已經選舉出新的master 127.0.0.1:26379> sentinel masters 1) 1) "name"2) "mymaster"3) "ip"4) "172.17.0.4"5) "port"6) "6379"7) "runid"8) "af1aa34a2a013c4b776456732ee5424c5590829c" [root@linux-node4 redis-sentinel]# docker inspect redis-sentinel_slave2_1 # 我這里查看sentinel_slave2_1的ip為172.17.0.4 [root@linux-node4 redis-sentinel]# redis-cli -h 127.0.0.1 -p 6381 127.0.0.1:6381> info # 查看角色 127.0.0.1:6381> set name zhangsan # 發現主庫可以進行寫入啦 OK 127.0.0.1:6381>

使用redis連接sentinel測試reds集群寫入

#!/usr/bin/env python import redis from redis.sentinel import Sentinel# 連接哨兵服務器(主機名也可以用域名) sentinel = Sentinel([('192.168.56.14', 26379), # 連接的是哨兵的('192.168.56.14', 26380),],socket_timeout=2,)# 獲取主服務器地址 master = sentinel.discover_master('mymaster')# 獲取主服務器進行寫入(密碼應為redis密碼)，源碼中連接的是docker內部地址網絡不通 master = sentinel.master_for('mymaster', socket_timeout=0.5, password='123456', db=15) w_ret = master.set('foo', 'bar') # 輸出：True# # 獲取從服務器進行讀取（默認是round-roubin） slave = sentinel.slave_for('mymaster', socket_timeout=0.5, password='redis_auth_pass', db=15) r_ret = slave.get('foo') print(r_ret) # # 輸出：bar

添加鏈接描述
詳情參考這個鏈接

總結

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