Redis之——Redis 集群的安装(Redis+CentOS)
2017-05-23 01:02
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转载请注明出处:http://blog.csdn.net/l1028386804/article/details/72633608
Redis 官方集群规范: http://redis.io/topics/cluster-spec
Redis 集群指南(中文翻译,紧供参考): http://redisdoc.com/topic/cluster-tutorial.html
Redis 集群规范(中文翻译,紧供参考): http://redisdoc.com/topic/cluster-spec.html
1、集群规划
要让 Redis3.2 集群正常工作至少需要 3 个 Master 节点, 要想实现高可用, 每个 Master 节点要配备至少 1 个 Slave 节点。 根据以上特点和要求, 进行如下的集群实施规划:使用 6 台服务器(物理机或虚拟机) 部署 3 个 Master + 3 个 Slave;
用户: root
编译和安装所需的包:
一、参考文档
Redis 官方集群指南: http://redis.io/topics/cluster-tutorialRedis 官方集群规范: http://redis.io/topics/cluster-spec
Redis 集群指南(中文翻译,紧供参考): http://redisdoc.com/topic/cluster-tutorial.html
Redis 集群规范(中文翻译,紧供参考): http://redisdoc.com/topic/cluster-spec.html
二、Redis 集群的安装(Redis3.2.9 + CentOS6.6_x64)
1、集群规划
要让 Redis3.2 集群正常工作至少需要 3 个 Master 节点, 要想实现高可用, 每个 Master 节点要配备至少 1 个 Slave 节点。 根据以上特点和要求, 进行如下的集群实施规划:使用 6 台服务器(物理机或虚拟机) 部署 3 个 Master + 3 个 Slave;主机名 | IP | 服务端口(默认6379) | 集群端口(服务端口数+10000) | 主/从 |
liuyazhuang01 | 192.168.1.111 | 7111 | 17111 | Master |
liuyazhuang02 | 192.168.1.112 | 7112 | 17112 | Master |
liuyazhuang03 | 192.168.1.113 | 7113 | 17113 | Master |
liuyazhuang04 | 192.168.1.114 | 7114 | 17114 | Slave |
liuyazhuang05 | 192.168.1.115 | 7115 | 17115 | Slave |
liuyazhuang06 | 192.168.1.116 | 7116 | 17116 | Slave |
2、配置防火墙
按规划:防火墙中打开相应的端口192.168.1.111 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7111 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17111 -j ACCEPT 192.168.1.112 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7112 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17112 -j ACCEPT 192.168.1.113 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7113 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17113 -j ACCEPT 192.168.1.114 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7114 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17114 -j ACCEPT 192.168.1.115 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7115 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17115 -j ACCEPT 192.168.1.116 -A INPUT -m state --state NEW -m tcp -p tcp --dport 7116 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17116 -j ACCEPT
3、准备
安装目录: /usr/local/redis3用户: root
编译和安装所需的包:
# yum install gcc tcl下载(或上传) Redis3 最新稳定版(当前最新版 redis-3.2.9.tar.gz)
# cd /usr/local/src # wget http://download.redis.io/releases/redis-3.2.9.tar.gz[/code]创建安装目录:# mkdir /usr/local/redis3解压:# tar -zxvf redis-3.2.9.tar.gz # cd redis-3.2.9安装(使用 PREFIX 指定安装目录):# make PREFIX=/usr/local/redis3 install安装完成后, 可以看到/usr/local/redis3 目录下有一个 bin 目录, bin 目录里就是 redis 的命令脚本:redis-benchmark redis-check-aof redis-check-dump redis-cli redis-server4、拷贝redis.conf
创建集群配置目录,并拷贝 redis.conf 配置文件到各节点配置目录:192.168.1.111 # mkdir -p /usr/local/redis3/cluster/7111 # cp /usr/local/src/redis-3.2.9/redis.conf /usr/local/redis3/cluster/7111/redis-7111.conf 192.168.1.112 # mkdir -p /usr/local/redis3/cluster/7112 # cp /usr/local/src/redis-3.2.9/redis.conf /usr/local/redis3/cluster/7112/redis-7112.conf 192.168.1.113 # mkdir -p /usr/local/redis3/cluster/7113 # cp /usr/local/src/redis-3.0.3/redis.conf /usr/local/redis3/cluster/7113/redis-7113.conf 192.168.1.114 # mkdir -p /usr/local/redis3/cluster/7114 # cp /usr/local/src/redis-3.0.3/redis.conf /usr/local/redis3/cluster/7114/redis-7114.conf 192.168.1.115 # mkdir -p /usr/local/redis3/cluster/7115 # cp /usr/local/src/redis-3.0.3/redis.conf /usr/local/redis3/cluster/7115/redis-7115.conf 192.168.1.116 # mkdir -p /usr/local/redis3/cluster/7116 # cp /usr/local/src/redis-3.0.3/redis.conf /usr/local/redis3/cluster/7116/redis-7116.conf5、修改redis.conf
修改配置文件中的下面选项:
6 个节点的 redis.conf 配置文件内容,注意修改下红色字体部分的内容即可,其他都相同:
包含了最少选项的集群配置文件示例如下:port 7000 cluster-enabled yes cluster-config-file nodes.conf cluster-node-timeout 5000 appendonly yes6、启动Redis实例
使用如下命令启动这 6 个 Redis 节点实例:192.168.1.111 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7111/redis-7111.conf 192.168.1.112 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7112/redis-7112.conf 192.168.1.113 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7113/redis-7113.conf 192.168.1.114 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7114/redis-7114.conf 192.168.1.115 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7115/redis-7115.conf 192.168.1.116 # /usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7116/redis-7116.conf启动之后用 PS 命令查看实例启动情况:[root@liuyazhuang01 cluster]# ps -ef | grep redis root 5443 1 0 22:49 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7111 [cluster] [root@liuyazhuang02 cluster]# ps -ef | grep redis root 5421 1 0 22:49 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7112 [cluster] [root@liuyazhuang03 cluster]# ps -ef | grep redis root 5457 1 0 22:49 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7113 [cluster] [root@liuyazhuang04 cluster]# ps -ef | grep redis root 5379 1 0 22:50 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7114 [cluster] [root@liuyazhuang05 cluster]# ps -ef | grep redis root 5331 1 0 22:50 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7115 [cluster] [root@liuyazhuang06 cluster]# ps -ef | grep redis root 5687 1 0 22:50 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7116 [cluster]注意: 启动完毕后, 6 个 Redis 实例尚未构成集群。7、创建集群
接下来准备创建集群
安装 ruby 和 rubygems(注意: 需要 ruby 的版本在 1.8.7 以上)# yum install ruby rubygems检查 ruby 版本:# ruby -v ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]gem 安装 redis ruby 接口:# gem install redis Successfully installed redis-3.2.1 1 gem installed Installing ri documentation for redis-3.2.1... Installing RDoc documentation for redis-3.2.1...执行 Redis 集群创建命令(只需要在其中一个节点上执行一次则可)# cd /usr/local/src/redis-3.0.3/src/ # cp redis-trib.rb /usr/local/bin/redis-trib # redis-trib create --replicas 1 192.168.1.114:7114 192.168.1.115:7115 192.168.1.116:7116 192.168.1.111:7111 192.168.1.112:7112 192.168.1.113:7113结果为:>>> Creating cluster Connecting to node 192.168.1.114:7114: OK Connecting to node 192.168.1.115:7115: OK Connecting to node 192.168.1.116:7116: OK Connecting to node 192.168.1.111:7111: OK Connecting to node 192.168.1.112:7112: OK Connecting to node 192.168.1.113:7113: OK >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 192.168.1.113:7113 192.168.1.112:7112 192.168.1.111:7111 Adding replica 192.168.1.116:7116 to 192.168.1.113:7113 Adding replica 192.168.1.115:7115 to 192.168.1.112:7112 Adding replica 192.168.1.114:7114 to 192.168.1.111:7111 S: 007a3fe8d7451d3d0a78fffd2653c8641809499c 192.168.1.114:7114 replicates 94e140b9ca0735040ae3428983835f1d93327aeb S: ea69b6b6e2e7723eed50b1dabea9d244ccf3f098 192.168.1.115:7115 replicates c642b3071c4b2b073707ed3c3a2c16d53a549eff S: 5f09dc0671732cf06a09f28631c90e0c68408520 192.168.1.116:7116 replicates 896a3c99da4fcf680de1f42406fccb551d8c40c3 M: 94e140b9ca0735040ae3428983835f1d93327aeb 192.168.1.111:7111 slots:10923-16383 (5461 slots) master M: c642b3071c4b2b073707ed3c3a2c16d53a549eff 192.168.1.112:7112 slots:5461-10922 (5462 slots) master M: 896a3c99da4fcf680de1f42406fccb551d8c40c3 192.168.1.113:7113 slots:0-5460 (5461 slots) master Can I set the above configuration? (type 'yes' to accept): yes (输入 yes 并按下回车确认之后,集群就会将配置应用到各个节点,并连接起(join)各个节点,也就是 让各个节点开始互相通讯) >>> 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 192.168.1.114:7114) M: 007a3fe8d7451d3d0a78fffd2653c8641809499c 192.168.1.114:7114 slots: (0 slots) master replicates 94e140b9ca0735040ae3428983835f1d93327aeb M: ea69b6b6e2e7723eed50b1dabea9d244ccf3f098 192.168.1.115:7115 slots: (0 slots) master replicates c642b3071c4b2b073707ed3c3a2c16d53a549eff M: 5f09dc0671732cf06a09f28631c90e0c68408520 192.168.1.116:7116 slots: (0 slots) master replicates 896a3c99da4fcf680de1f42406fccb551d8c40c3 M: 94e140b9ca0735040ae3428983835f1d93327aeb 192.168.1.111:7111 slots:10923-16383 (5461 slots) master M: c642b3071c4b2b073707ed3c3a2c16d53a549eff 192.168.1.112:7112 slots:5461-10922 (5462 slots) master M: 896a3c99da4fcf680de1f42406fccb551d8c40c3 192.168.1.113:7113 slots:0-5460 (5461 slots) master一切正常的情况下输出以下信息[OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.最后一行信息表示集群中的 16384 个槽都有至少一个主节点在处理, 集群运作正常。
集群创建过程说明:
(1) 给定 redis-trib 程序的命令是 create , 这表示我们希望创建一个新的集群;
(2) 这里的 --replicas 1 表示每个主节点下有一个从节点;
(3) 之后跟着的其它参数则是实例的地址列表,程序使用这些地址所指示的实例来创建新集群;总的来说,以上命令的意思就是让 redis-trib 程序创建一个包含三个主节点和三个从节点的集群。接着, redis-trib 会打印出一份预想中的配置给你看,如果你觉得没问题的话(注意核对主从关系是否是你想要的),就可以输入 yes , redis-trib 就会将这份配置应用到集群当中。8、集群简单测试
使用 redis-cli 命令进入集群环境[root@liuyazhuang04 bin]# ./redis-cli -c -p 7114 127.0.0.1:7114> set lyz liuyazhuang -> Redirected to slot [8559] located at 192.168.1.112:7112 OK [root@liuyazhuang01 bin]# ./redis-cli -c -p 7111 127.0.0.1:7111> get lyz -> Redirected to slot [8559] located at 192.168.1.112:7112 "liuyazhuang" [root@liuyazhuang02 bin]# ./redis-cli -c -p 7112 127.0.0.1:7112> get lyz "liuyazhuang" 127.0.0.1:7112> [root@liuyazhuang01 bin]# ./redis-cli -p 7111 cluster nodes三、将 Redis 配置成服务
(非伪集群适用, 也就是每个节点都单独物理机部署的情况下):
按上面的操作步骤, Redis 的启动脚本为: /usr/local/src/redis-3.2.9/utils/redis_init_script将启动脚本复制到/etc/rc.d/init.d/目录下,并命名为 redis:# cp /usr/local/src/redis-3.2.9/utils/redis_init_script /etc/rc.d/init.d/redis编辑/etc/rc.d/init.d/redis, 修改相应配置,使之能注册成为服务:# vi /etc/rc.d/init.d/redis#!/bin/sh # # Simple Redis init.d script conceived to work on Linux systems # as it does use of the /proc filesystem. REDISPORT=6379 EXEC=/usr/local/bin/redis-server CLIEXEC=/usr/local/bin/redis-cli PIDFILE=/var/run/redis_${REDISPORT}.pid CONF="/etc/redis/${REDISPORT}.conf" case "$1" in start) if [ -f $PIDFILE ] then echo "$PIDFILE exists, process is already running or crashed" else echo "Starting Redis server..." $EXEC $CONF fi ;; stop) if [ ! -f $PIDFILE ] then echo "$PIDFILE does not exist, process is not running" else PID=$(cat $PIDFILE) echo "Stopping ..." $CLIEXEC -p $REDISPORT shutdown while [ -x /proc/${PID} ] do echo "Waiting for Redis to shutdown ..." sleep 1 done echo "Redis stopped" fi ;; *) echo "Please use start or stop as first argument" ;; esac查看以上 redis 服务脚本, 关注标为橙色的几个属性, 做如下几个修改的准备:
(1) 在脚本的第一行后面添加一行内容如下:#chkconfig: 2345 80 90(如果不添加上面的内容,在注册服务时会提示: service redis does not support chkconfig)
(2) REDISPORT 端口修改各节点对应的端口; (注意,端口名将与下面的配置文件名有关)
(3) EXEC=/usr/local/bin/redis-server 改为 EXEC=/usr/local/redis3/bin/redis-server
(4) CLIEXEC=/usr/local/bin/redis-cli 改为 CLIEXEC=/usr/local/redis3/bin/redis-cli
(5) 配置文件设置, 对 CONF 属性作如下调整:CONF="/etc/redis/${REDISPORT}.conf"改为 CONF="/usr/local/redis3/cluster/${REDISPORT}/redis-${REDISPORT}.conf"
(6) 更改 redis 开启的命令,以后台运行的方式执行:$EXEC $CONF & #“&”作用是将服务转到后面运行,修改后的/etc/rc.d/init.d/redis 服务脚本内容为(注意各节点的端口不同):
修改后的/etc/rc.d/init.d/redis 服务脚本内容为(注意各节点的端口不同)#!/bin/sh #chkconfig: 2345 80 90 # # Simple Redis init.d script conceived to work on Linux systems # as it does use of the /proc filesystem. REDISPORT=7111 EXEC=/usr/local/redis3/bin/redis-server CLIEXEC=/usr/local/redis3/bin/redis-cli PIDFILE=/var/run/redis-${REDISPORT}.pid CONF="/usr/local/redis3/cluster/${REDISPORT}/redis-${REDISPORT}.conf " case "$1" in start) if [ -f $PIDFILE ] then echo "$PIDFILE exists, process is already running or crashed" else echo "Starting Redis server..." $EXEC $CONF & fi ;; stop) if [ ! -f $PIDFILE ] then echo "$PIDFILE does not exist, process is not running" else PID=$(cat $PIDFILE) echo "Stopping ..." $CLIEXEC -p $REDISPORT shutdown while [ -x /proc/${PID} ] do echo "Waiting for Redis to shutdown ..." sleep 1 done echo "Redis stopped" fi ;; *) echo "Please use start or stop as first argument" ;; esac以上配置操作完成后, 便可将 Redis 注册成为服务:# chkconfig --add redis防火墙中打开对应的端口,各节点的端口不同(前面已操作则可跳过此步)# vi /etc/sysconfig/iptables添加:-A INPUT -m state --state NEW -m tcp -p tcp --dport 7111 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 17111 -j ACCEPT重启防火墙:# service iptables restart启动 Redis 服务# service redis start将 Redis 添加到环境变量中:# vi /etc/profile在最后添加以下内容:## Redis env export PATH=$PATH:/usr/local/redis3/bin使配置生效:# source /etc/profile现在就可以直接使用 redis-cli 等 redis 命令了:
关闭 Redis 服务# service redis stop默认情况下, Redis 未开启安全认证,可以通过/usr/local/redis3/cluster/7111/redis-7111.conf 的requirepass 指定一个验证密码四、温馨提示
大家可以到链接http://download.csdn.net/detail/l1028386804/9849374下载Redis集群配置文件
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