1. 创建目录
要让集群正常运作至少需要三个主节点， 不过在刚开始试用集群功能时， 强烈建议使用六个节点： 其中三个为主节点， 而其余三个则是各个主节点的从节点
创建一个新目录 redis，并在其中创建六个以端口号为名字的子目录，每个子目录都是一个 redis
mkdir redis
cd redis
mkdir 7000 7001 7002 7003 7004 7005
2. 修改配置文件
分别进入每个子目录，修改 redis.conf 中如下的配置项
port 7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
其中端口号 port 分别为 7000-7005
3. 运行实例
接着，从 Redis Github 页面的 unstable 分支中下载最新代码，然后编译出可执行文件放在 redis 文件夹中。（其实从我们的任一子目录里面编译后在 src 文件夹里拿出来也可以）通过如下命令分别创建出 6 个实例
cd 7000
../redis-server ./redis.conf
4. 创建集群
可以使用 src 目录中的 redis-trib 程序来创建集群，首先需要安装 redis gem 才能运行 redis-trib
gem install redis
然后创建集群
./redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 \
127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005
然后终端会列出集群的情况，并礼貌性的问你这样创建可以吗，当然是输入 yes
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
127.0.0.1:7000
127.0.0.1:7001
127.0.0.1:7002
Adding replica 127.0.0.1:7003 to 127.0.0.1:7000
Adding replica 127.0.0.1:7004 to 127.0.0.1:7001
Adding replica 127.0.0.1:7005 to 127.0.0.1:7002
M: 968f13cefb4f895cec739794835fcd160bde22af 127.0.0.1:7000
slots:0-5460 (5461 slots) master
M: 3c088766a36ed8ccd7bef5e6e2fbe75c48bc10c0 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
M: 433145fbee24fa60a3e7194b9b8056b02f375023 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
S: d29b5ce6e4ea9a33a9044d4211ba37aafa5198f8 127.0.0.1:7003
replicates 968f13cefb4f895cec739794835fcd160bde22af
S: ba9052a112e11e757a563ce6ed89adde463c7ec5 127.0.0.1:7004
replicates 3c088766a36ed8ccd7bef5e6e2fbe75c48bc10c0
S: 130bfe6c6e1b8d31ed1e030ae7c41902be268a1f 127.0.0.1:7005
replicates 433145fbee24fa60a3e7194b9b8056b02f375023
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 127.0.0.1:7000)
M: 968f13cefb4f895cec739794835fcd160bde22af 127.0.0.1:7000
slots:0-5460 (5461 slots) master
1 additional replica(s)
M: 433145fbee24fa60a3e7194b9b8056b02f375023 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
1 additional replica(s)
M: 3c088766a36ed8ccd7bef5e6e2fbe75c48bc10c0 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
1 additional replica(s)
S: ba9052a112e11e757a563ce6ed89adde463c7ec5 127.0.0.1:7004
slots: (0 slots) slave
replicates 3c088766a36ed8ccd7bef5e6e2fbe75c48bc10c0
S: d29b5ce6e4ea9a33a9044d4211ba37aafa5198f8 127.0.0.1:7003
slots: (0 slots) slave
replicates 968f13cefb4f895cec739794835fcd160bde22af
S: 130bfe6c6e1b8d31ed1e030ae7c41902be268a1f 127.0.0.1:7005
slots: (0 slots) slave
replicates 433145fbee24fa60a3e7194b9b8056b02f375023
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
到此集群就创建成功了。
但很明显这是个伪集群，如果条件允许的话建议使用 6 台机器来创建集群，只需修改相应的地址和端口，并在防火墙开放该端口就行。
5. 简单测试
使用 redis-cli 进行简单的命令测试
$ redis-cli -c -p 7000
redis 127.0.0.1:7000> set foo bar
-> Redirected to slot [12182] located at 127.0.0.1:7002
OK
redis 127.0.0.1:7002> set hello world
-> Redirected to slot [866] located at 127.0.0.1:7000
OK
redis 127.0.0.1:7000> get foo
-> Redirected to slot [12182] located at 127.0.0.1:7002
"bar"
redis 127.0.0.1:7000> get hello
-> Redirected to slot [866] located at 127.0.0.1:7000
"world"
