如何用docker部署redis cluster

2018-02-02 19:50:13来源:cnblogs.com作者:小新是也人点击

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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

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 formatDocker Engine release
3.417.09.0+
3.317.06.0+
3.217.04.0+
3.11.13.1+
3.01.13.0+
2.317.06.0+
2.21.13.0+
2.11.12.0+
2.01.10.0+
1.01.9.1.+

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
    :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。

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