Redis集群(3主3从)搭建 指南
拓扑规划如图-1所示:
步骤一:分别在192.168.2.140 和 192.168.2.141 上安装redis
下载redis 源码包,这里使用的是 redis-3.2.5.tar.gz
1)、加压缩源码包
[root@140 /root]# tar -xf redis-3.2.5.tar.gz
2)、[root@140 ~]# cd /root/redis-3.2.5
3)、源码编译安装
[root@140 ~]# make && make install
步骤二:准备集群环境
1)、在192.168.2.140 上,创建多实例 (1台机器上3个实例)
[root@140 ~]# mkdir -p /home/redis-cluster/{7001..7003}
2)、在192.168.2.140 上 拷贝源码包里的配置文件redis.conf
[root@140 ~]# cp /root/redis-3.2.5/redis.conf /home/redis-cluster/
[root@140 ~]# ls
3)、编辑配置文件
[root@140 ~]# vim
/home/redis-cluster/redis.conf 找到以下对应的内容修改即可
bind 192.168.2.140 #修改ip
port 7001 #修改端口
cluster-enabled yes #启用集群功能
cluster-config-file nodes.conf #存储集群信息的配置文件
cluster-node-timeout 5000 #集群节点通信超时时间
4)、拷贝配置文件到对应的实例中,并修改端口
[root@140 ~]# cp /home/redis-cluster/redis.conf /home/redis-cluster/7001
[root@140 ~]# cp /home/redis-cluster/redis.conf /home/redis-cluster/7002
[root@140 ~]# cp /home/redis-cluster/redis.conf /home/redis-cluster/7003
[root@140 ~]# vim /home/redis-cluster/7002/redis.conf
port 7002
[root@140 ~]# vim /home/redis-cluster/7003/redis.conf
port 7003
5)、创建redis 启停脚本
创建redis启动脚本:
[root@140 ~]# vim /home/redis-cluster/start-redis.conf
#!/bin/bash
cd /home/redis-cluster/7001
/usr/local/bin/redis-server redis.conf
sleep 5
cd /home/redis-cluster/7002
/usr/local/bin/redis-server redis.conf
sleep 5
cd /home/redis-cluster/7003
/usr/local/bin/redis-server redis.conf
sleep 5
ps -ef | grep redis
[root@140 ~]# chmod +x /home/redis-cluster/start-redis.conf
创建redis 停止脚本:
[root@140 ~]# vim /home/redis-cluster/stop-redis.sh
#!/bin/bash
for i in $(ps -ef | grep redis | grep -v “grep” | awk ‘{print $2}’)
do
kill -9 $i
done
[root@140 ~]# chmod +x /home/redis-cluster/stop-redis.conf
6)、在192.168.2.140 上把redis-cluster目录下的内容打个包,并copy 到 192.168.2.141 上
[root@140 ~]# tar -czvf /tmp/redis-cluster.tar.gz /home/redis-cluster
[root@140 ~]# scp /tmp/redis-cluster.tar.gz root@192.168.2.141:/home
在192.168.2.141 上 创建redis-cluster 目录,并解压缩redis-cluster.tar.gz 到此路径下
[root@141 ~]# cd /home
[root@141 ~]# mkdir redis-cluster
[root@141 ~]# tar -xf redis-cluster.tar.gz -C /home/redis-cluster
7)、在192.168.2.141 上修改各个实例的配置文件(只需要把IP更改下即可)
[root@141 ~]# vim /home/redis-cluster/7001/redis.conf
bind 192.168.2.141
[root@141 ~]# vim /home/redis-cluster/7002/redis.conf
bind 192.168.2.141
[root@141 ~]# vim /home/redis-cluster/7003/redis.conf
bind 192.168.2.141
8)、启动192.168.2.140 , 192.168.2.141 上所有的redis 实例
[root@140 ~]# /home/redis-cluster/start-redis.conf
[root@141 ~]# /home/redis-cluster/start-redis.conf
[root@140 ~]# ps -ef | grep redis
[root@141 ~]# ps -ef | grep redis
9)、仅在192.168.2.140 上部署ruby脚本运行环境
[root@140 ~]#yum -y install rubygems
[root@140 ~]# gem install redis-3.0.0.gem
Successfully installed redis-3.2.1
Parsing documentation for redis-3.2.1
Installing ri documentation for redis-3.2.1
1 gem installed
10)、在192.168.2.140 上 ,创建集群
[root@140 ~]# redis-trib.rb create –replicas 1 \
192.168.2.140:7001 192.168.2.140:7002 192.168.2.140:7003 \
192.168.2.141:7001 192.168.2.141:7002 192.168.2.141:7003
##–replicas 表示slave 副本数量
步骤三:查看集群信息
1)、在192.168.2.140 上 查看集群信息
[root@140 ~]# redis-trib.rb info 192.168.2.140:7001 #查看集群信息
192.168.2.141:7001 (a9895e4b…) -> 0 keys | 5462 slots | 1 slaves.
192.168.2.140:7002 (d21b0ed5…) -> 0 keys | 5461 slots | 1 slaves.
192.168.2.141:7002 (569d7302…) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average
2)、在192.168.2.140 上 检测集群
[root@140 ~]# redis-trib.rb check 192.168.2.140:7002 #检测集群
M: d21b0ed59412d70451b400902c257d56ace1316f 192.168.2.140:7002
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 246edc50a2b68e3a6ac9292d3c3f1b01518aee0f 192.168.2.141:7003
slots: (0 slots) slave
replicates d21b0ed59412d70451b400902c257d56ace1316f
S: f0452952d61e089b1aa0cc07320a69a19f6e2edb 192.168.2.140:7003
slots: (0 slots) slave
replicates a9895e4bddf1b229b4bf938e13895918900a5345
M: a9895e4bddf1b229b4bf938e13895918900a5345 192.168.2.141:7001
slots:5461-10922 (5462 slots) master
1 additional replica(s)
M: 569d73024be3b0e340dde8f93408b8f53be27cb4 192.168.2.141:7002
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: 436df8918cae75d81f203733178b6d6e6627d0f4 192.168.2.140:7001
slots: (0 slots) slave
replicates 569d73024be3b0e340dde8f93408b8f53be27cb4
[OK] All nodes agree about slots configuration.
>>> Check for open slots…
>>> Check slots coverage…
[OK] All 16384 slots covered.
3)、在任意一台redis服务器本机,查看集群信息
[root@localhost redis-cluster]# redis-cli -h 192.168.2.141 -p 7003
192.168.2.141:7003> cluster info #查看集群信息
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:9
cluster_my_epoch:9
cluster_stats_messages_sent:34137
cluster_stats_messages_received:34091
192.168.2.141:7003> cluster nodes #查看集群节点信息
f0452952d61e089b1aa0cc07320a69a19f6e2edb 192.168.2.140:7003 slave a9895e4bddf1b229b4bf938e13895918900a5345 0 1589779875813 4 connected
246edc50a2b68e3a6ac9292d3c3f1b01518aee0f 192.168.2.141:7003 myself,slave d21b0ed59412d70451b400902c257d56ace1316f 0 0 8 connected
436df8918cae75d81f203733178b6d6e6627d0f4 192.168.2.140:7001 slave 569d73024be3b0e340dde8f93408b8f53be27cb4 0 1589779877339 7 connected
569d73024be3b0e340dde8f93408b8f53be27cb4 192.168.2.141:7002 master – 0 1589779875305 7 connected 0-5460
a9895e4bddf1b229b4bf938e13895918900a5345 192.168.2.141:7001 master – 0 1589779876322 4 connected 5461-10922
d21b0ed59412d70451b400902c257d56ace1316f 192.168.2.140:7002 master – 0 1589779876830 9 connected 10923-16383
步骤四:访问集群
1)、在客户端连接集群中的任意一台服务器存取数据
[root@140 ~]# redis-cli -c -h 192.168.2.140 -p 7001
192.168.2.140:7001> set x 100 #存储KYE X 的值为100
-> Redirected to slot [16287] located at 192.168.2.141:7002 //提示存储在141上
OK
192.168.2.140:7001> get x
-> Redirected to slot [16287] located at 192.168.2.141:7002
“100”
至此我的redis-cluster 3主3从集群搭建 就搭建完成,下期给大家带来 redis-cluster 集群的节点管理,以及模拟故障
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