集群搭建

1、集群组件安装

EPEL源安装ruby支持
yum install ruby rubygems -y
使用国内源
gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/


如果无法使用，可以使用aliyun
gem sources -a http://mirrors.aliyun.com/rubygems/ 
gem sources  --remove http://rubygems.org/
gem sources -l
gem install redis -v 3.3.3

2、集群节点准备

规划：
端口：7000-7005
路径:
/application/data/7000
/application/data/7001
/application/data/7002
/application/data/7003
/application/data/7004
/application/data/7005

日志路径：
/var/log/redis7000.log
/var/log/redis7001.log
/var/log/redis7002.log
/var/log/redis7003.log
/var/log/redis7004.log
/var/log/redis7005.log

pid文件
/application/data/7000/redis.pid
/application/data/7001/redis.pid
/application/data/7002/redis.pid
/application/data/7003/redis.pid
/application/data/7004/redis.pid
/application/data/7005/redis.pid


创建节点目录：
mkdir -p /application/data/7000
mkdir -p /application/data/7001
mkdir -p /application/data/7002
mkdir -p /application/data/7003
mkdir -p /application/data/7004
mkdir -p /application/data/7005


配置文件添加：
-------------------------
vim /application/data/7000/redis.conf

port 7000
daemonize yes
pidfile /application/data/7000/redis.pid
logfile "/var/log/redis7000.log"
dbfilename dump.rdb
dir /application/data/7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes


vim /application/data/7001/redis.conf

port 7001
daemonize yes
pidfile /application/data/7001/redis.pid
logfile "/var/log/redis7001.log"
dbfilename dump.rdb
dir /application/data/7001
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes

vim /application/data/7002/redis.conf

port 7002
daemonize yes
pidfile /application/data/7002/redis.pid
logfile "/var/log/redis7002.log"
dbfilename dump.rdb
dir /application/data/7002
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes



vim /application/data/7003/redis.conf

port 7003
daemonize yes
pidfile /application/data/7003/redis.pid
logfile "/var/log/redis7003.log"
dbfilename dump.rdb
dir /application/data/7003
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes


vim /application/data/7004/redis.conf

port 7004
daemonize yes
pidfile /application/data/7004/redis.pid
logfile "/var/log/redis7004.log"
dbfilename dump.rdb
dir /application/data/7004
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes



vim /application/data/7005/redis.conf

port 7005
daemonize yes
pidfile /application/data/7005/redis.pid
logfile "/var/log/redis7005.log"
dbfilename dump.rdb
dir /application/data/7005
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes


启动所有节点
redis-server /application/data/7000/redis.conf
redis-server /application/data/7001/redis.conf
redis-server /application/data/7002/redis.conf
redis-server /application/data/7003/redis.conf
redis-server /application/data/7004/redis.conf
redis-server /application/data/7005/redis.conf


ps -ef |grep 700

3、集群创建

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

4、集群状态查看

redis-cli -p 7000 cluster nodes | grep master

5、Python 连接 redis cluster

+++++++++++++++Python 连接 redis cluster+++++++++++++++++
(1) redis-py并没有提供redis-cluster的支持，去github找了一下，有个叫redis-py-cluster的源码，
但是和redis-py不是一个作者，地址为:https://github.com/Grokzen/redis-py-cluster
watch,star,fork还算可以。
(2) 安装
   Latest stable release from pypi
$ pip install redis-py-cluster  
    or from source
$ python setup.py install
(3) 使用
>>> from rediscluster import StrictRedisCluster  
>>> startup_nodes = [{"host": "127.0.0.1", "port": "7000"}]  
>>> # Note: decode_responses must be set to True when used with python3  
>>> rc = StrictRedisCluster(startup_nodes=startup_nodes, decode_responses=True)  
>>> rc.set("foo", "bar")  
True  
>>> print(rc.get("foo"))  
'bar'