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}/datadone
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-clusterx-restart: &default-restart alwaysx-netmode: &default-netmode hostservices: 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:192.168.30.70:7001192.168.30.70:7002192.168.30.70:7003Adding replica 192.168.30.70:7004 to 192.168.30.70:7001Adding replica 192.168.30.70:7005 to 192.168.30.70:7002Adding replica 192.168.30.70:7006 to 192.168.30.70:7003M: 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1 192.168.30.70:7001 slots:0-5460 (5461 slots) masterM: bb8fda08e1dcd39e937443f81b5458e80f52d804 192.168.30.70:7002 slots:5461-10922 (5462 slots) masterM: d907530ee9f6356e0e61a6c7f4d0cc1b22da1189 192.168.30.70:7003 slots:10923-16383 (5461 slots) masterS: 52eee69afa751d71c84d5436d14b0e16a37536fa 192.168.30.70:7004 replicates 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1S: 701ed2fbb3df9fc63b083818620f5c020d05e323 192.168.30.70:7005 replicates bb8fda08e1dcd39e937443f81b5458e80f52d804S: a3548a9dffa225f05786ea2289db65f5f1c623be 192.168.30.70:7006 replicates d907530ee9f6356e0e61a6c7f4d0cc1b22da1189Can I set the above configuration? (type 'yes' to accept):
输入yes
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 d907530ee9f6356e0e61a6c7f4d0cc1b22da1189S: 701ed2fbb3df9fc63b083818620f5c020d05e323 192.168.30.70:7005@17005 slots: (0 slots) slave replicates bb8fda08e1dcd39e937443f81b5458e80f52d804S: 52eee69afa751d71c84d5436d14b0e16a37536fa 192.168.30.70:7004@17004 slots: (0 slots) slave replicates 5a7bd7698b1fe55beb44faac051d66c8a03fd1b1M: 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。
