1 下载最新版redis
wget 'http://download.redis.io/releases/redis-3.2.3.tar.gz'
2 编译安装
#安装到/opt/redis-cluster目录
tar zxvf redis-3.2.3.tar.gz
cd redis-3.2.3/
make
make PREFIX=/opt/redis-cluster install
#创建配置目录，拷贝相关文件
mkdir /opt/redis-cluster/{log conf rdb run}
#redis目录
cp src/redis-trib.rb /opt/redis-cluster/bin/
3 安装其他依赖包
apt-get install ruby 2.3.1
gem install redis
4 创建配置文件
redis.conf
bind 0.0.0.0
daemonize yes
pidfile /opt/redis-cluster/run/redis-6379.pid
（pidfile /usr/local/etc/redis/run/redis.pid）
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 0
loglevel notice
logfile "/opt/redis-cluster/log/redis-6379.log"
databases 16
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-6379.rdb
dir /opt/redis-cluster/rdb
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
appendonly yes
appendfilename "redis-6379.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-6379.conf
cluster-node-timeout 15000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
其实大部分都是原有的配置信息，不需要做大的改动，红色文字部分都需要调整，与集群相关的配置如下：
cluster-enabled yes
cluster-config-file nodes-6379.conf
cluster-node-timeout 15000
注意其中的nodes-6379.conf这个文件不需要创建，在初始化集群的时候会自动创建的。
5 在启动redis实例前先修改一些系统级别的配置
echo never >/sys/kernel/mm/transparent_hugepage/enabled
# 打开/etc/sysctl.conf，追加如下内容
vm.overcommit_memory = 1#使配置生效
sysctl -p6 启动所有redis实例
cd /opt/redis-cluster/bin
./redis-server /opt/redis-cluster/conf/redis-6379.conf
./redis-server /opt/redis-cluster/conf/redis-6380.conf
./redis-server /opt/redis-cluster/conf/redis-6381.conf
./redis-server /opt/redis-cluster/conf/redis-7379.conf
./redis-server /opt/redis-cluster/conf/redis-7380.conf
./redis-server /opt/redis-cluster/conf/redis-7381.conf
检查一下端口监听的状态：
netstat -tupln
7 redis-trib.rb
redis-trib.rb是一个官方提供的用来操作cluster的ruby脚本，我们后面管理cluster会经常使用到这个脚本
Usage: redis-trib <command> <options> <arguments ...>
create host1:port1 ... hostN:portN
--replicas <arg>
check host:port
fix host:port
reshard host:port
--from <arg>
--to <arg>
--slots <arg>
--yes
add-node new_host:new_port existing_host:existing_port
--slave
--master-id <arg>
del-node host:port node_id
set-timeout host:port milliseconds
call host:port command arg arg .. arg
import host:port
--from <arg>
help (show this help)
For check, fix, reshard, del-node, set-timeout you can specify the host and port of any working node in the cluster.
8 初始化启动cluster
切记用具体IP启动
./redis-trib.rb create --replicas 1 127.0.0.1:6379 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:7379 127.0.0.1:7380 127.0.0.1:7381
./redis-trib.rb create --replicas 1 10.157.26.84:6379 10.157.26.85:6379 10.157.26.86:6379 10.157.26.87:6379 10.157.26.88:6379 10.157.26.89:6379
创建结果如下
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
127.0.0.1:6379
127.0.0.1:6380
127.0.0.1:6381
Adding replica 127.0.0.1:7379 to 127.0.0.1:6379
Adding replica 127.0.0.1:7380 to 127.0.0.1:6380
Adding replica 127.0.0.1:7381 to 127.0.0.1:6381
M: e85567eff146a649f971b7e543e8421fe64c29e0 127.0.0.1:6379
slots:0-5460 (5461 slots) master
M: b58997471998a59a4238bec506a8452a04187749 127.0.0.1:6380
slots:5461-10922 (5462 slots) master
M: 34c068fe3182321bb53b5c3a106676095dc03bdd 127.0.0.1:6381
slots:10923-16383 (5461 slots) master
S: bc4f4a6c25135dc9ede0428b3567d4e5a6db87bf 127.0.0.1:7379
replicates e85567eff146a649f971b7e543e8421fe64c29e0
S: ea56cb0020e8c24a55c0301bd073aedc99da0206 127.0.0.1:7380
replicates b58997471998a59a4238bec506a8452a04187749
S: 021ea707f99795088d474cc622b25b928e8ed73f 127.0.0.1:7381
replicates 34c068fe3182321bb53b5c3a106676095dc03bdd
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 127.0.0.1:6379)
M: e85567eff146a649f971b7e543e8421fe64c29e0 127.0.0.1:6379
slots:0-5460 (5461 slots) master
M: b58997471998a59a4238bec506a8452a04187749 127.0.0.1:6380
slots:5461-10922 (5462 slots) master
M: 34c068fe3182321bb53b5c3a106676095dc03bdd 127.0.0.1:6381
slots:10923-16383 (5461 slots) master
M: bc4f4a6c25135dc9ede0428b3567d4e5a6db87bf 127.0.0.1:7379
slots: (0 slots) master
replicates e85567eff146a649f971b7e543e8421fe64c29e0
M: ea56cb0020e8c24a55c0301bd073aedc99da0206 127.0.0.1:7380
slots: (0 slots) master
replicates b58997471998a59a4238bec506a8452a04187749
M: 021ea707f99795088d474cc622b25b928e8ed73f 127.0.0.1:7381
slots: (0 slots) master
replicates 34c068fe3182321bb53b5c3a106676095dc03bdd
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
检查一下cluster的状态： ./redis-trib.rb check 127.0.0.1:6379
>>> Performing Cluster Check (using node 127.0.0.1:6379)
M: e85567eff146a649f971b7e543e8421fe64c29e0 127.0.0.1:6379
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: ea56cb0020e8c24a55c0301bd073aedc99da0206 127.0.0.1:7380
slots: (0 slots) slave
replicates b58997471998a59a4238bec506a8452a04187749
S: bc4f4a6c25135dc9ede0428b3567d4e5a6db87bf 127.0.0.1:7379
slots: (0 slots) slave
replicates e85567eff146a649f971b7e543e8421fe64c29e0
M: 34c068fe3182321bb53b5c3a106676095dc03bdd 127.0.0.1:6381
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 021ea707f99795088d474cc622b25b928e8ed73f 127.0.0.1:7381
slots: (0 slots) slave
replicates 34c068fe3182321bb53b5c3a106676095dc03bdd
M: b58997471998a59a4238bec506a8452a04187749 127.0.0.1:6380
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.
9 随便接入cluster的某个节点进行测试
redis-cli -c -h 127.0.0.1 -p 6379
注意：redis-cli在接入集群模式时，要使用-c参数
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> set test nidaye
-> Redirected to slot [6918] located at 127.0.0.1:6380
OK
127.0.0.1:6380> get test
"nidaye"
127.0.0.1:6380> set nihaogepi nihaogepi
-> Redirected to slot [5243] located at 127.0.0.1:6379
OK
127.0.0.1:6379>
redis.conf配置文件