redis怎么组建集群


本文摘自PHP中文网,作者silencement,侵删。

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:

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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

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wget http://download.redis.io/releases/redis-5.0.0.tar.gz

tar xzf redis-5.0.0.tar.gz

cd redis-5.0.0

make

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:

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/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:

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port 7001  #端口

cluster-enabled yes #启用集群模式

cluster-config-file nodes.conf

cluster-node-timeout 5000 #超时时间

appendonly yes

daemonize 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

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/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

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/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:

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>>> Performing hash slots allocation on 6 nodes...

Master[0] -> Slots 0 - 5460

Master[1] -> Slots 5461 - 10922

Master[2] -> Slots 10923 - 16383

Adding replica 192.168.2.40:7004 to 192.168.2.40:7001

Adding replica 192.168.2.40:7005 to 192.168.2.40:7002

Adding 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 master

M: 191c645200a8b4d267f71e3354c8248dbb533dde 192.168.2.40:7001

   slots:[0-5460] (5461 slots) master

M: 400a08d4e5a534c1b609988105d3e045395fbd12 192.168.2.40:7002

   slots:[5461-10922] (5462 slots) master

M: 684f6aa0fbccda295ce6818a8c01ee7255a7b002 192.168.2.40:7003

   slots:[10923-16383] (5461 slots) master

S: f2701549ae98315b432d73b49d139ee77d5685b4 192.168.2.40:7004

   replicates 684f6aa0fbccda295ce6818a8c01ee7255a7b002

S: 9fdc1e375436767ab815cbddd3df674f3bc2ca99 192.168.2.40:7005

   replicates 191c645200a8b4d267f71e3354c8248dbb533dde

S: e7742888ed85b37cff4a98e861e99bb16e8bae2c 192.168.2.40:7006

   replicates 400a08d4e5a534c1b609988105d3e045395fbd12

Can 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 cluster

Waiting 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 191c645200a8b4d267f71e3354c8248dbb533dde

S: e7742888ed85b37cff4a98e861e99bb16e8bae2c 192.168.2.40:7006

   slots: (0 slots) slave

   replicates 400a08d4e5a534c1b609988105d3e045395fbd12

M: 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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