前言
由于本人是个docker控，不喜欢安装各种环境，而且安装redis-trib也有点繁琐，索性用docker来做redis cluster。
本文用的是伪集群，真正的集群放到不同的机器即可。端口是7001-7006。
工作目录： /data/redis
创建文件夹
首先创建一堆对应端口的文件夹，下面是脚本
create.sh
for i in `seq 7001 7006`
do
mkdir -p ${i}/data
done
添加执行权限并执行
chmod 777 create.sh ./create.sh
部署redis
本人不喜欢docker run，所以用了docker-compose。官方文档 https://docs.docker.com/compose/overview/
创建docker-compose.yml
用publicisworldwide/redis-cluster镜像的原因是人家已经把配置文件写好了，配置文件没有挂载是懒，别学我
docker-compose.yml
version: '3.4' x-image: &default-image publicisworldwide/redis-cluster x-restart: &default-restart always x-netmode: &default-netmode host services: redis1: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7001/data:/data environment: - REDIS_PORT=7001 redis2: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7002/data:/data environment: - REDIS_PORT=7002 redis3: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7003/data:/data environment: - REDIS_PORT=7003 redis4: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7004/data:/data environment: - REDIS_PORT=7004 redis5: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7005/data:/data environment: - REDIS_PORT=7005 redis6: image: *default-image network_mode: *default-netmode restart: *default-restart volumes: - /data/redis/7006/data:/data environment: - REDIS_PORT=7006
启动所有redis
docker-compose up -d
如果报错，那就是版本问题。
查看docker版本
docker -v
在文档中可查看docker版本支持的docker-compose.yml版本，为了方便大家查看，我复制出来了。不过一般来说，docker升级比较快，功能迭代也很快，最好还是用最新版本。
Compose file format
Docker Engine release
3.4
17.09.0+
3.3
17.06.0+
3.2
17.04.0+
3.1
1.13.1+
3.0
1.13.0+
2.3
17.06.0+
2.2
1.13.0+
2.1
1.12.0+
2.0
1.10.0+
1.0
1.9.1.+
部署cluster
运行以下命令(inem0o/redis-trib没有pull会自动pull)
注意：加上-it，不然后续的确认没法继续
docker run --rm -it inem0o/redis-trib create --replicas 1 192.168.30.70:7001 192.168.30.70:7002 192.168.30.70:7003 192.168.30.70:7004 192.168.30.70:7005 192.168.30.70:7006
会出现
> Creating cluster > Performing hash slots allocation on 6 nodes... Using 3 masters: 192.168.30.70:7001 192.168.30.70:7002 192.168.30.70:7003 Adding replica 192.168.30.70:7004 to 192.168.30.70:7001 Adding replica 192.168.30.70:7005 to 192.168.30.70:7002 Adding replica 192.168.30.70:7006 to 192.168.30.70:7003 M: 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1 192.168.30.70:7001 slots:0-5460 (5461 slots) master M: bb8fda08e1dcd39e937443f81b5458e80f52d804 192.168.30.70:7002 slots:5461-10922 (5462 slots) master M: d907530ee9f6356e0e61a6c7f4d0cc1b22da1189 192.168.30.70:7003 slots:10923-16383 (5461 slots) master S: 52eee69afa751d71c84d5436d14b0e16a37536fa 192.168.30.70:7004 replicates 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1 S: 701ed2fbb3df9fc63b083818620f5c020d05e323 192.168.30.70:7005 replicates bb8fda08e1dcd39e937443f81b5458e80f52d804 S: a3548a9dffa225f05786ea2289db65f5f1c623be 192.168.30.70:7006 replicates d907530ee9f6356e0e61a6c7f4d0cc1b22da1189 Can I set the above configuration"htmlcode">Waiting for the cluster to join..... > Performing Cluster Check (using node 192.168.30.70:7001) M: 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1 192.168.30.70:7001 slots:0-5460 (5461 slots) master 1 additional replica(s) M: d907530ee9f6356e0e61a6c7f4d0cc1b22da1189 192.168.30.70:7003@17003 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: a3548a9dffa225f05786ea2289db65f5f1c623be 192.168.30.70:7006@17006 slots: (0 slots) slave replicates d907530ee9f6356e0e61a6c7f4d0cc1b22da1189 S: 701ed2fbb3df9fc63b083818620f5c020d05e323 192.168.30.70:7005@17005 slots: (0 slots) slave replicates bb8fda08e1dcd39e937443f81b5458e80f52d804 S: 52eee69afa751d71c84d5436d14b0e16a37536fa 192.168.30.70:7004@17004 slots: (0 slots) slave replicates 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1 M: bb8fda08e1dcd39e937443f81b5458e80f52d804 192.168.30.70:7002@17002 slots:5461-10922 (5462 slots) master 1 additional replica(s) [OK] All nodes agree about slots configuration. > Check for open slots... > Check slots coverage... [OK] All 16384 slots covered.完成。
遇到的问题
创建集群的时候会遇到Waiting for the cluster to join....................一直没有成功
答：网络模式改成host，docker run 的方式加上--net host，docker-compose方式加上network_mode: host。
我原本是端口映射 7001:7000+17001:17000，但是不行，不知道什么原因。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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