redis怎么组建集群

Redis  /  管理员 发布于 7年前   162

简要说明

2018年十月 Redis 发布了稳定版本的 5.0 版本，推出了各种新特性，其中一点是放弃 Ruby的集群方式，改为 使用 C语言编写的 redis-cli的方式，是集群的构建方式复杂度大大降低。关于集群的更新可以在 Redis5 的版本说明中看到，如下：

The cluster manager was ported from Ruby (redis-trib.rb) to C code inside redis-cli. check `redis-cli --cluster help ` for more info.

可以查看Redis官网查看集群搭建方式，连接如下

https://redis.io/topics/cluster-tutorial

以下步骤是在一台 Linux 服务器上搭建有6个节点的 Redis集群。

操作步骤

创建目录

新建目录：/root/software/redis

下载源码并解压编译

wget http://download.redis.io/releases/redis-5.0.0.tar.gztar xzf redis-5.0.0.tar.gzcd redis-5.0.0make

创建6个Redis配置文件

6个配置文件不能在同一个目录，此处我们定义如下：

/root/software/redis/redis-cluster-conf/7001/redis.conf/root/software/redis/redis-cluster-conf/7002/redis.conf/root/software/redis/redis-cluster-conf/7003/redis.conf/root/software/redis/redis-cluster-conf/7004/redis.conf/root/software/redis/redis-cluster-conf/7005/redis.conf/root/software/redis/redis-cluster-conf/7006/redis.conf

配置文件的内容为：

port 7001  #端口cluster-enabled yes #启用集群模式cluster-config-file nodes.confcluster-node-timeout 5000 #超时时间appendonly yesdaemonize yes #后台运行protected-mode no #非保护模式pidfile  /var/run/redis_7001.pid

其中 port 和 pidfile 需要随着 文件夹的不同调增

启动节点

/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7001/redis.conf/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7002/redis.conf/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7003/redis.conf/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7004/redis.conf/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7005/redis.conf/root/software/redis/redis-5.0.0/src/redis-server  /root/software/redis/redis-cluster-conf/7006/redis.conf

启动集群

/root/software/redis/redis-5.0.0/src/redis-cli --cluster create 192.168.2.40:7001 192.168.2.40:7002 192.168.2.40:7003 192.168.2.40:7004 192.168.2.40:7005 192.168.2.40:7006 --cluster-replicas 1

启动后，可看到成功信息，如下：

>>> Performing hash slots allocation on 6 nodes...Master[0] -> Slots 0 - 5460Master[1] -> Slots 5461 - 10922Master[2] -> Slots 10923 - 16383Adding replica 192.168.2.40:7004 to 192.168.2.40:7001Adding replica 192.168.2.40:7005 to 192.168.2.40:7002Adding replica 192.168.2.40:7006 to 192.168.2.40:7003>>> Trying to optimize slaves allocation for anti-affinity[WARNING] Some slaves are in the same host as their masterM: 191c645200a8b4d267f71e3354c8248dbb533dde 192.168.2.40:7001   slots:[0-5460] (5461 slots) masterM: 400a08d4e5a534c1b609988105d3e045395fbd12 192.168.2.40:7002   slots:[5461-10922] (5462 slots) masterM: 684f6aa0fbccda295ce6818a8c01ee7255a7b002 192.168.2.40:7003   slots:[10923-16383] (5461 slots) masterS: f2701549ae98315b432d73b49d139ee77d5685b4 192.168.2.40:7004   replicates 684f6aa0fbccda295ce6818a8c01ee7255a7b002S: 9fdc1e375436767ab815cbddd3df674f3bc2ca99 192.168.2.40:7005   replicates 191c645200a8b4d267f71e3354c8248dbb533ddeS: e7742888ed85b37cff4a98e861e99bb16e8bae2c 192.168.2.40:7006   replicates 400a08d4e5a534c1b609988105d3e045395fbd12Can I set the above configuration? (type 'yes' to accept): yes>>> Nodes configuration updated>>> Assign a different config epoch to each node>>> Sending CLUSTER MEET messages to join the clusterWaiting for the cluster to join....>>> Performing Cluster Check (using node 192.168.2.40:7001)M: 191c645200a8b4d267f71e3354c8248dbb533dde 192.168.2.40:7001   slots:[0-5460] (5461 slots) master   1 additional replica(s)M: 684f6aa0fbccda295ce6818a8c01ee7255a7b002 192.168.2.40:7003   slots:[10923-16383] (5461 slots) master   1 additional replica(s)S: 9fdc1e375436767ab815cbddd3df674f3bc2ca99 192.168.2.40:7005   slots: (0 slots) slave   replicates 191c645200a8b4d267f71e3354c8248dbb533ddeS: e7742888ed85b37cff4a98e861e99bb16e8bae2c 192.168.2.40:7006   slots: (0 slots) slave   replicates 400a08d4e5a534c1b609988105d3e045395fbd12M: 400a08d4e5a534c1b609988105d3e045395fbd12 192.168.2.40:7002   slots:[5461-10922] (5462 slots) master   1 additional replica(s)S: f2701549ae98315b432d73b49d139ee77d5685b4 192.168.2.40:7004   slots: (0 slots) slave   replicates 684f6aa0fbccda295ce6818a8c01ee7255a7b002[OK] All nodes agree about slots configuration.>>> Check for open slots...>>> Check slots coverage...[OK] All 16384 slots covered.

至此，Reids集群搭建完成。

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