没有 ruby 你如何搭建一套 redis 集群

资源准备

1. 准备三台 Linux 服务器：

1. 192.168.9.1

1. 192.168.9.2

2. 192.168.9.3

3. 下载 redis-3.2.9

4. redis cluster 因为选举算法的因素所以要求 master 节点数必须为奇数

5. 这里我们演示的是搭建 3 主 3 从，共 6 节点的 redis 集群:

1. 192.168.9.1:6379

1. 192.168.9.1:6380
2. 192.168.9.2:6379
3. 192.168.9.2:6380
4. 192.168.9.3:6379
5. 192.168.9.3:6380

服务器初始化及 redis 编译

1. 创建 redis 用户并指定 gid 为：redis

1. 三台服务器分别执行：root@XXXX# useradd redis

1. 三台服务器分别执行：redis@XXXX$ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
2. 在192.168.9.1上执行：redis@XXXX$ ssh-copy-id 192.168.9.2
3. 在192.168.9.1上执行：redis@XXXX$ ssh-copy-id 192.168.9.3
4. 编译 redis

1. 将准备好的 redis-3.2.9.tar.gz 上传到 192.168.9.1 服务器的 /home/redis 宿主目录下

1. [email protected]$ tar -xvf redis-3.2.9.tar.gz
2. [email protected]$ cd redis-3.2.9 && make && cd redis-3.2.9/src && make PREFIX=../../ install

redis 集群手工搭建及配置

1. 目录结构规划：

[email protected]$ mkdir -p /home/redis/6379/{config,data,logs} && mkdir -p /home/redis/6380/{config,data,logs}

1. redis cluster 配置
2. 在 192.168.9.1 服务器中编辑 /home/redis/6379/config/redis-6379.conf，并保存如下内容：

[email protected]$ vi /home/redis/6379/config/redis-6379.conf
####### redis server 配置信息
port 6379
maxmemory 4gb
protected-mode no
daemonize yes
dir /home/redis/6379/data
pidfile /home/redis/6379/data/redis-6379.pid

logfile /home/redis/6379/logs/redis-6379.log
tcp-backlog 511
timeout 300
tcp-keepalive 60
loglevel notice
cluster-enabled yes
cluster-node-timeout 15000
cluster-config-file "/home/redis/6379/nodes-6379.conf"

1. 在 192.168.9.1 服务器中编辑 /home/redis/6380/config/redis-6380.conf，并保存如下内容：

[email protected]$ vi /home/redis/6380/config/redis-6380.conf
####### redis server 配置信息

port 6380
maxmemory 4gb
protected-mode no
daemonize yes
dir /home/redis/6380/data
pidfile /home/redis/6380/data/redis-6380.pid
logfile /home/redis/6380/logs/redis-6380.log
tcp-backlog 511
timeout 300
tcp-keepalive 60
loglevel notice
cluster-enabled yes
cluster-node-timeout 15000
cluster-config-file "/home/redis/6380/nodes-6380.conf"

1. 将 192.168.9.1 服务器上 /home/redis/bin、/home/redis/6379、/home/redis/6380，分发到另外 2 台服务器中

[email protected]$ scp -r /home/redis/bin /home/redis/6379 /home/redis/6380 [email protected]:/home/redis
[email protected]$ scp -r /home/redis/bin /home/redis/6379 /home/redis/6380 [email protected]:/home/redis

1. 启动所有 redis 节点

[email protected]$ cd ~/bin && ./redis-server ../6379/config/redis-6379.conf
[email protected]$ cd ~/bin && ./redis-server ../6380/config/redis-6380.conf

[email protected]$ cd ~/bin && ./redis-server ../6379/config/redis-6379.conf
[email protected]$ cd ~/bin && ./redis-server ../6380/config/redis-6380.conf
[email protected]$ cd ~/bin && ./redis-server ../6379/config/redis-6379.conf
[email protected]$ cd ~/bin && ./redis-server ../6380/config/redis-6380.conf

1. 节点间握手：

这一步可以在任意节点上进行，这里以 192.168.9.1:6379 为例

1. [email protected]$ ./redis-cli -h 192.168.9.1 -p 6379

2. 192.168.9.1:6379> cluster meet 192.168.9.1 6380

3. 192.168.9.1:6379> cluster meet 192.168.9.2 6379

4. 192.168.9.1:6379> cluster meet 192.168.9.2 6380

5. 192.168.9.1:6379> cluster meet 192.168.9.3 6379

6. 192.168.9.1:6379> cluster meet 192.168.9.3 6380

7. 分配 hash 槽：

这里我们规划三台服务器上端口奇数节点为 master 节点，端口偶数节点为 slave 节点

1. [email protected]$ cd ~/bin && ./redis-cli -h 192.168.9.1 -p 6379 cluster addslots {0..5461}

2. [email protected]$ cd ~/bin && ./redis-cli -h 192.168.9.2 -p 6379 cluster addslots {5462..10922}

3. [email protected]$ cd ~/bin && ./redis-cli -h 192.168.9.3 -p 6379 cluster addslots {10923..16383}

4. 从节点复制：

1. 查看各个节点的 nodeid

1. [email protected]$ ./redis-cli -h 192.168.9.1 -p 6379
1. 192.168.9.1:6379> cluster nodes

image.png

1. 登陆各个从节点对主节点进行复制：** 这里我们规划 192.168.9.1:6380 复制 192.168.9.2:6379，192.168.9.2:6380 复制 192.168.9.3:6379，192.168.9.3:6380 复制 192.168.9.1:6379**
   1. [email protected]$ ./redis-cli -h 192.168.9.1 -p 6380
   2. 192.168.9.1:6380> cluster replicate NODEID 注意这里的 NODEID 并不是 redis 节点的 ip:port，而是从节点要复制的 redis master 节点的 hash 值即 NODEID
   3. [email protected]$ ./redis-cli -h 192.168.9.2 -p 6380
   4. 192.168.9.2:6380> cluster replicate NODEID
   5. [email protected]$ ./redis-cli -h 192.168.9.3 -p 6380
   6. 192.168.9.3:6380> cluster replicate NODEID

如果不出意外，一个基础的 3 主 3 从的 redis cluster 已经搭建完毕 ^_