三节点哨兵集群部署
docker-compose文件准备
version: '3.1'
services:
redis01:
image: swr.cn-southwest-2.myhuaweicloud.com/vp-guiyang/redis:5.0.0
command: sh -c "redis-server /usr/local/redis/redis.conf; redis-sentinel /usr/local/redis/sentinel.conf"
ports:
- 36379:6379
- 46379:26379
volumes:
- ./redis01/data:/data
- ./redis01/redis.conf:/usr/local/redis/redis.conf
- ./redis01/sentinel.conf:/usr/local/redis/sentinel.conf
restart: always
redis02:
image: swr.cn-southwest-2.myhuaweicloud.com/vp-guiyang/redis:5.0.0
command: sh -c "redis-server /usr/local/redis/redis.conf; redis-sentinel /usr/local/redis/sentinel.conf"
ports:
- 36380:6379
- 46380:26379
volumes:
- ./redis02/data:/data
- ./redis02/redis.conf:/usr/local/redis/redis.conf
- ./redis02/sentinel.conf:/usr/local/redis/sentinel.conf
restart: always
redis03:
image: swr.cn-southwest-2.myhuaweicloud.com/vp-guiyang/redis:5.0.0
command: sh -c "redis-server /usr/local/redis/redis.conf; redis-sentinel /usr/local/redis/sentinel.conf"
ports:
- 36381:6379
- 46381:26379
volumes:
- ./redis03/data:/data
- ./redis03/redis.conf:/usr/local/redis/redis.conf
- ./redis03/sentinel.conf:/usr/local/redis/sentinel.conf
restart: always
redis配置文件需要修改的地方
redis主节点
- 将bind 127.0.0.1注释掉
- protected-mode yes改为 protected no
- logfile "" 改为 logfile "/var/log/redis.log"(方便日后排查redis故障)
- databases 16 (可以根据需求该需要的数据库数量)
- 如果使用RDB做持久化,可以修改下面的配置
save 900 1
save 300 10
save 60 10000
- dbfilename dump.rdb指定rdb在保存的文件名(可以根据需要修改)
- dir /data 指定dump.rdb存放的目录,需要与挂载目录保持一致。保证数据能正常持久化到硬盘中
- requirepass 配置redis的密码
redis从节点
- 在主节点的基础上加入replica-serve-stale-data yes
哨兵的配置修改
- logfile "" 改为 logfile "/var/log/redis-sentinel.log"(方便日后排查故障)
- sentinel announce-ip 172.18.41.8 (用来告诉其他哨兵我的地址是多少)
- sentinel announce-port 46379 (用来告诉其他哨兵我的端口是多少)
- sentinel monitor mymaster 172.18.41.8 36379 2(配置监控的redis 名字、master的地址、端口、quorum)
quorm计算公式:quorum = (n / 2) + 1 (n表示主机数量)
- sentinel auth-pass mymaster 密码 配置主监控的认证密码