# 安装 redis 集群 {#安装-redis-集群}

本文讲述 redis 集群的部署步骤。redis 是当前主流的分布式缓存服务, 支持集群部署, 相比同类产品 memcached,支持更多的数据结构。

# 1. 约定 {#_1-约定}

操作系统：Ubuntu 16.04.3 LTS

# 2. 安装 {#_2-安装}

# 2.1 编译安装单机版 redis {#_2-1-编译安装单机版-redis}

tar -zxvf /root/redis-5.0.5.tar.gz -c /root
cd /root/redis-5.0.5
make -j2 PREFIX=/usr/local/redis install
cp /root/redis-5.0.5/redis.conf /usr/local/redis/

# 2.2 准备集群目录 {#_2-2-准备集群目录}

mkdir -p /usr/local/redis-cluster/bin
mkdir -p /usr/local/redis-cluster/9001
mkdir -p /usr/local/redis-cluster/9002
mkdir -p /usr/local/redis-cluster/9003
mkdir -p /usr/local/redis-cluster/9004
mkdir -p /usr/local/redis-cluster/9005
mkdir -p /usr/local/redis-cluster/9006

# 2.3 准备集群可执行文件 {#_2-3-准备集群可执行文件}

cp /usr/local/redis/bin/* /usr/local/redis-cluster/bin/
cp /root/redis-5.0.5/src/mkreleasehdr.sh /usr/local/redis-cluster/bin/
cp /root/redis-5.0.5/src/redis-trib.rb /usr/local/redis-cluster/bin/

# 2.4 复制一个新 redis 实例 {#_2-4-复制一个新-redis-实例}

cp -r /usr/local/redis/ /usr/local/redis-cluster/9001/

修改配置文件

vi /usr/local/redis-cluster/9001/redis.conf

<!-- 每个节点的端口号 -->
port 9001
daemonize yes
<!-- 绑定当前机器 IP -->
bind 172.18.100.177
dir /usr/local/redis-cluster/9001/data/
<!-- pid 9001 和 port 要对应 -->
pidfile /var/run/redis_9001.pid
<!-- 启动集群模式 -->
cluster-enabled yes
<!-- 9001 和 port 要对应 -->
cluster-config-file nodes-9001.conf
cluster-node-timeout 15000
appendonly yes

创建数据目录
mkdir /usr/local/redis-cluster/9001/data

# 2.5 基于 9001 节点复制出其他的节点 {#_2-5-基于-9001-节点复制出其他的节点}

cp -r /usr/local/redis-cluster/9001/* /usr/local/redis-cluster/9002/
cp -r /usr/local/redis-cluster/9001/* /usr/local/redis-cluster/9003/
cp -r /usr/local/redis-cluster/9001/* /usr/local/redis-cluster/9004/
cp -r /usr/local/redis-cluster/9001/* /usr/local/redis-cluster/9005/
cp -r /usr/local/redis-cluster/9001/* /usr/local/redis-cluster/9006/

sed -i 's/9001/9002/g' /usr/local/redis-cluster/9002/redis.conf
sed -i 's/9001/9003/g' /usr/local/redis-cluster/9003/redis.conf
sed -i 's/9001/9004/g' /usr/local/redis-cluster/9004/redis.conf
sed -i 's/9001/9005/g' /usr/local/redis-cluster/9005/redis.conf
sed -i 's/9001/9006/g' /usr/local/redis-cluster/9006/redis.conf

# 2.6 启动 6 个节点 {#_2-6-启动-6-个节点}

vi /usr/local/redis-cluster/bin/start-redis-cluster.sh

#!/bin/bash
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9001/redis.conf
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9002/redis.conf
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9003/redis.conf
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9004/redis.conf
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9005/redis.conf
/usr/local/redis-cluster/bin/redis-server /usr/local/redis-cluster/9006/redis.conf

chmod +x /usr/local/redis-cluster/bin/start-redis-cluster.sh
/usr/local/redis-cluster/bin/start-redis-cluster.sh

# 2.7 安装高版本 ruby {#_2-7-安装高版本-ruby}

yum install -y centos-release-scl-rh
yum install -y rh-ruby24
scl enable rh-ruby24 bash

# 2.8 安装集群所需软件 {#_2-8-安装集群所需软件}

gem sources --add https://gems.ruby-china.com/ --remove https://rubygems.org/
sudo gem install redis (依赖版本 ruby>=2.3.0)

# 2.9 启动集群 {#_2-9-启动集群}

/usr/local/redis-cluster/bin/redis-cli --cluster create 172.18.100.177:9001 172.18.100.177:9002 172.18.100.177:9003 172.18.100.177:9004 172.18.100.177:9005 172.18.100.177:9006 --cluster-replicas 1