CentOS Redis cluster 高可用架构篇

编写日期：2017-07-19

编写作者：mtsbv110

邮    箱：[email protected]

 

主机规划：192.168.9.151

Redis版本：redis-3.2.8.tar.gz

安装目录：/usr/local/redis

 

主机规划：192.168.9.152

Redis版本：redis-3.2.8.tar.gz

安装目录：/usr/local/redis

 

主机规划：192.168.9.153

Redis版本：redis-3.2.8.tar.gz

安装目录：/usr/local/redis

 

Redis 集群搭建

主机名          IP地址      服务端口        集群端口       主/从

jetsen-redis-01   192.168.9.151   7111            17111           Master

jetsen-redis-02   192.168.9.152   7114            17114           Slave

 

jetsen-redis-02   192.168.9.152   7113            17113           Master

jetsen-redis-01   192.168.9.151   7112            17112           Slave

 

jetsen-redis-03   192.168.9.153   7115            17115           Master

jetsen-redis-03   192.168.9.151   7116            17116           Slave

 

• 创建集群数据存放目录

[[email protected]~]# mkdir -p /usr/local/redis/cluster/7111

[[email protected]~]# mkdir -p /usr/local/redis/cluster/7112

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7113

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7114

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7115

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7116

• 创建集群日志存放目录

[[email protected]~]# mkdir -p /usr/local/redis/cluster/7111/log

[[email protected]~]# mkdir -p /usr/local/redis/cluster/7112/log

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7113/log

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7114/log

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7115/log

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7116/log

• 创建集群配置文件存放目录

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7111/conf/

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7112/conf/

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7113/conf/

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7114/conf/
[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7115/conf/

[[email protected] ~]# mkdir -p /usr/local/redis/cluster/7116/conf/

 

• 配置文件修改

1. daemonize yes

设置为守护进程

1. pidfile /var/run/redis_7111.pid

指定pidfile

1. databases 1

默认16

1. cluster-enabled yes

开启集群模式

1. cluster-config-file /usr/local/redis/cluster/7111/conf/nodes.conf

集群配置文件，启动自动生成，不用人为干预

1. cluster-node-timeout 15000

结点互联超时时间 单位毫秒

1. cluster-migration-barrier 1

数据迁移副本临界数，一个主结点拥有对个从结点的情况下，就要割让一个从结点给另外一个没有任何从结点的主结点

1. cluster-require-full-coverage yes

如果某一些key space 没有被集群任何结点覆盖，则停止接受写入

1. appendonly yes

开启AOF

1. dir /usr/local/redis/cluster/7111
2. logfile "/usr/local/redis/cluster/7111/log/7001.log"
3. bind 192.168.9.151
4. port 7111

同理准备另外5份配置文件，上载到服务器对应的

/usr/local/redis/cluster/711X/conf/目录中

 

1. 安装安装ruby 和 rubygems

yum install -y ruby

yum install -y rubygems

gem install redis

 

 

• 准备启动脚本

1. 复制redis启动脚本到/etc/rc.d/init.d目录中，修改名称为redis_7111

cp /usr/local/src/redis3.0/utils/redis_init_script

/etc/rc.d/init.d/redis_7111

1. REDISPORT=7111
2. EXEC=/usr/local/redis/bin/redis-server
3. CLIEXEC=/usr/local/redis/bin/redis-cli
4. PIDFILE=/var/run/redis_${REDISPORT}.pid
5. CONF="/usr/local/redis/cluster/${REDISPORT}/conf/redis-${REDISPORT}.conf"
6. $EXEC $CONF &

将对应的脚本分别上传到对应结点的目录中

 

• 执行Redis集群创建命令

1. 拷贝redis-trib.rb（只需要值一个结点拷贝即可）

[[email protected] src]#

 cp /usr/local/src/redis3.0/src/redis-trib.rb /usr/local/bin/

1. 启动相应结点的Redis

 

[[email protected] ~]# /etc/rc.d/init.d/redis_7111 start

[[email protected] ~]# /etc/rc.d/init.d/redis_7112 start

 

[[email protected] ]# /etc/rc.d/init.d/redis_7113 start

[[email protected] ]# /etc/rc.d/init.d/redis_7114 start

 

[[email protected]]# /etc/rc.d/init.d/redis_7115 start

[[email protected]]# /etc/rc.d/init.d/redis_7116 start

 

1. 执行创建命令

[[email protected] ~]# redis-trib.rb create --replicas 1 192.168.9.151:7111 192.168.9.151:7112 192.168.9.152:7113 192.168.9.152:7114 192.168.9.153:7115 192.168.9.153:7116

 

检查集群信息

[[email protected] ~]# redis-trib.rb check 192.168.9.151:7111

[[email protected] ~]# redis-cli -h 192.168.9.151 -c -p 7111 cluster nodes

[[email protected] ~]# redis-cli -h 192.168.9.151 -c -p 7111