redis cluster单机伪分布式搭
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最近公司引进微服务框架,之前的一台redis的预存60G已经无法满足现在的260G业务需要,经过一番考虑搭建了这套集群 . 为了方便我就用一台服务器演示,生产环境中不建议这么做(没啥用),只为记录一下过程,至于精细化的配置需要在生产中自行研究
演示环境
[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
redis服务部署过程
- 我下载的是redis-4.0.14.tar.gz版本的包
- 解压安装
tar -zxvf redis-4.0.14.tar.gz
make install - 启动服务
./redis-server - 验证,启动客户端测试
./redis-cli 127.0.0.1:6379> set ab b OK 127.0.0.1:6379> get ab "b" 127.0.0.1:6379> keys * "ab" "foo"
- 关闭redis服务
./redis-cli shutdown - 设置redis后台启动,在/usr/local/bin目录下
cp /usr/local/redis/redis-4.0.8/redis.conf ./
修改redis.conf这个配置文件,找到 daemonize no 这一行,将 no 改成 yes 保存
然后启动redis时携带配置文件,./redis-server redis.conf - 在/usr/local/bin目录下修改好redis.conf配置(主要是设置后台启动、bind、密码、保护模式等)后
mkdir /etc/redis
cp /usr/local/bin/redis.conf /etc/redis/6379.conf - 将redis自带的启动脚本复制到/etc/init.d目录下,命名为redisd(通常都以d结尾表示是后台自启动服务)
cp /usr/local/redis/redis-4.0.8/utils/redis_init_script /etc/init.d/redisd - 设置为开机自启动 chkconfig redisd on
如果报错redisd 不支持 chkconfig,在/etc/init.d/redisd中增加如下片段,即可再设置开机自启动#!/bin/sh #chkconfig: 2345 90 10 #description: Redis is a persistent key-value database
- chkconfig redisd on 成功之后即可以使用启动脚本来启动redis
伪分布式集群的搭建
搭建一个最小的集群需要6台机器(由节点投票机制决定至少需要3台主节点,另外为了高可用每个主节点至少要备一个从节点,所以总共需要6个节点。这里6个节点全部设在一台机上,通过端口号来分别。实现伪分布式。)
- 在/usr/local/目录下创建文件夹redisCluster,并在redisCluster目录下创建6个文件夹
mkdir /usr/local/redisCluster
mkdir /usr/local/redisCluster/redis0{1,2,3,4,5,6} - 复制单机单实例下可正常启动redis情况下的 /usr/local/bin 目录下的所有文件分别到上面创建的6个文件夹中
cp /usr/local/bin/* /usr/local/redisCluster/redis01/ cp /usr/local/bin/* /usr/local/redisCluster/redis02/ cp /usr/local/bin/* /usr/local/redisCluster/redis03/ cp /usr/local/bin/* /usr/local/redisCluster/redis04/ cp /usr/local/bin/* /usr/local/redisCluster/redis05/ cp /usr/local/bin/* /usr/local/redisCluster/redis06/
- 再对每个实例里面的redis.conf进行修改(这里修改其中一份,然后其他5份进行复制之后修改下端口号即可)
vi /usr/local/redisCluster/redis01/redis.conf 第1处: port 6379 ————> 值 改成 7001 第2处: daemonize no ————> 值 改成 yes 第3处: pidfile /var/run/redis_6379.pid ————> 值 改成 ./redis_7001.pid 第4处: logfile "" ————> 值 改成 "./logs/redis_7001.log" 第5处: bind 127.0.0.1 ————> 值 改成 本机IP(如我这里是192.168.25.129) 第6处: protected-mode yes ————> 值 改成 no 第7处: # cluster-enabled yes ————> 去掉注释 第8处: # cluster-config-file nodes-6379.conf ————> 去掉注释,并把数字改成对应端口号,如这里是7001 第9处: # cluster-node-timeout 15000 ————> 去掉注释 第10处: appendonly no ————> 值 改成 yes
- 将上面编辑号保存的/usr/local/redisCluster/redis01/目录下的redis.conf文件重命名为7001.conf,然后复制5份分别放到redis02、redis03、redis04、redis05、redis06文件夹下面(可删除掉原文件夹中的redis.conf文件),然后再对每个文件夹下的.conf文件重命名为对应端口号.conf,接着编辑里面的内容,将之前修改为7001的全部修改成对应端口号保存即可
- 将ruby脚本拷贝到redisCluster目录下
cp /usr/local/redis/redis-4.0.8/class="lazy" data-src/redis-trib.rb /usr/local/redisCluster/ - 创建redis集群启动、停止的脚本以及ruby创建集群的脚本并授权
touch /usr/local/redisCluster/startCluster.sh touch /usr/local/redisCluster/shutdownCluster.sh touch /usr/local/redisCluster/createCluster.sh chmod 777 /usr/local/redisCluster/*.sh
startcluster.sh 内容如下:
/usr/local/rediscluster/redis01/redis-server /usr/local/rediscluster/redis01/7001.conf /usr/local/rediscluster/redis02/redis-server /usr/local/rediscluster/redis02/7002.conf /usr/local/rediscluster/redis03/redis-server /usr/local/rediscluster/redis03/7003.conf /usr/local/rediscluster/redis04/redis-server /usr/local/rediscluster/redis04/7004.conf /usr/local/rediscluster/redis05/redis-server /usr/local/rediscluster/redis05/7005.conf /usr/local/rediscluster/redis06/redis-server /usr/local/rediscluster/redis06/7006.conf
shutdowncluster.sh 内容如下:
/usr/local/rediscluster/redis01/redis-cli -c -h 10.11.1.103 -p 7001 shutdown /usr/local/rediscluster/redis02/redis-cli -c -h 10.11.1.103 -p 7002 shutdown /usr/local/rediscluster/redis03/redis-cli -c -h 10.11.1.103 -p 7003 shutdown /usr/local/rediscluster/redis04/redis-cli -c -h 10.11.1.103 -p 7004 shutdown /usr/local/rediscluster/redis05/redis-cli -c -h 10.11.1.103 -p 7005 shutdown /usr/local/rediscluster/redis06/redis-cli -c -h 10.11.1.103 -p 7006 shutdown
createcluster.sh 内容如下:
ruby redis-trib.rb create --replicas 1 10.11.1.103:7001 10.11.1.103:7002 10.11.1.103:7003 10.11.1.103:7004 10.11.1.103:7005 10.11.1.103:7006
- 用刚刚创建的脚本启动6个实例,再用ruby脚本创建集群
cd /usr/local/redisCluster/ ./startCluster.sh ./createcluster.sh(输入yes)
- 验证,查看进程
[root@localhost rediscluster]# ps -ef | grep redis|grep -v grep root 23716 1 0 Aug08 ? 00:10:55 /usr/local/rediscluster/redis01/redis-server *:7001 [cluster] root 23721 1 0 Aug08 ? 00:10:53 /usr/local/rediscluster/redis02/redis-server *:7002 [cluster] root 23723 1 0 Aug08 ? 00:10:51 /usr/local/rediscluster/redis03/redis-server *:7003 [cluster] root 23731 1 0 Aug08 ? 00:13:37 /usr/local/rediscluster/redis04/redis-server *:7004 [cluster] root 23736 1 0 Aug08 ? 00:10:55 /usr/local/rediscluster/redis05/redis-server *:7005 [cluster] root 23741 1 0 Aug08 ? 00:08:59 /usr/local/rediscluster/redis06/redis-server *:7006 [cluster]
- 集群就搭建成功了。登录任意一个节点客户端验证(-c 表示以集群方式登录),也可以用redis客户端工具RedisDesktopManager来可视化地管理redis数据库。
cd /usr/local/redisCluster/redis01/ ./redis-cli -h 10.11.1.103 -p 7001 -c 10.11.1.103:7001> set aaaa b OK 10.11.1.103:7002> get aaaa -> Redirected to slot [1953] located at 10.11.1.103:7001 "b" 10.11.1.103:7001> cluster info cluster_state:ok cluster_slots_assigned:16384 cluster_slots_ok:16384 cluster_slots_pfail:0 cluster_slots_fail:0 cluster_known_nodes:6 cluster_size:3 cluster_current_epoch:6 cluster_my_epoch:1 cluster_stats_messages_ping_sent:367555 cluster_stats_messages_pong_sent:342015 cluster_stats_messages_publish_sent:903835 cluster_stats_messages_sent:1613405 cluster_stats_messages_ping_received:342015 cluster_stats_messages_pong_received:367550 cluster_stats_messages_publish_received:1084495 cluster_stats_messages_received:1794060 10.11.1.103:7001>
- 在redis01 02 03 里配置哨兵,这里只配置了redis01的剩余的按照这个自行配置即可,需要注意的是监视的名称不可重复(已标出)
sentinel.conf 配置如下:protected-mode no port 27001 sentinel deny-scripts-reconfig yes sentinel monitor **mymaster1** 10.11.1.103 7001 2 sentinel down-after-milliseconds **mymaster1** 10000 logfile "/var/log/sentinel1.log" dir "/usr/local/rediscluster/redis01" sentinel failover-timeout **mymaster1** 15000 sentinel config-epoch **mymaster1** 0 sentinel leader-epoch **mymaster1** 0 sentinel known-slave **mymaster1 10.11.1.103 7004** sentinel current-epoch 0
- 在rediscluster目录下面创建哨兵启动和关闭的脚本
startsentinel.sh 的内容如下/usr/local/rediscluster/redis01/redis-sentinel /usr/local/rediscluster/redis01/sentinel.conf & /usr/local/rediscluster/redis02/redis-sentinel /usr/local/rediscluster/redis02/sentinel.conf & /usr/local/rediscluster/redis03/redis-sentinel /usr/local/rediscluster/redis03/sentinel.conf &
stopsentinel.sh 脚本的内容如下:
kill -9 `ps -ef | grep sentinel| grep -v grep|awk '{print $2}'`
- 再次查看进程
[root@localhost rediscluster]# ps -ef | grep redis|grep -v grep root 23716 1 0 Aug08 ? 00:10:55 /usr/local/rediscluster/redis01/redis-server *:7001 [cluster] root 23721 1 0 Aug08 ? 00:10:53 /usr/local/rediscluster/redis02/redis-server *:7002 [cluster] root 23723 1 0 Aug08 ? 00:10:51 /usr/local/rediscluster/redis03/redis-server *:7003 [cluster] root 23731 1 0 Aug08 ? 00:13:37 /usr/local/rediscluster/redis04/redis-server *:7004 [cluster] root 23736 1 0 Aug08 ? 00:10:55 /usr/local/rediscluster/redis05/redis-server *:7005 [cluster] root 23741 1 0 Aug08 ? 00:08:59 /usr/local/rediscluster/redis06/redis-server *:7006 [cluster] root 23924 1 0 Aug08 ? 00:09:55 /usr/local/rediscluster/redis01/redis-sentinel *:27001 [sentinel] root 23925 1 0 Aug08 ? 00:09:38 /usr/local/rediscluster/redis02/redis-sentinel *:27002 [sentinel] root 23926 1 0 Aug08 ? 00:10:22 /usr/local/rediscluster/redis03/redis-sentinel *:27003 [sentinel]
- 这样就完成搭建,以下是需要联网安装的软件
yum -y install gcc ## make install 命令需要此环境 yum -y intall ruby ## 安装ruby(此时安装的可能使低版本的) curl -L get.rvm.io | bash -s stable ## 安装rvm source /usr/local/rvm/scripts/rvm ## 使安装的rvm立即生效 rvm install 2.4.1 ## 通过rvm来安装ruby高级版本 gem install redis ## 通过ruby的工具包gem来安装redis接口
- 需要注意的是,在关闭redis集群之后,再次重复步骤启动集群时会报错,此时只需要删除redis各个实例中生成的文件即可再次按步骤启动集群
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