0.环境介绍

Linux采用CentOS7 64位

主节点：

192.168.25.137:7000

192.168.25.138:7000

192.168.25.139:7000

从节点

192.168.25.137:7001

192.168.25.138:7001

192.168.25.139:7001

1.现处于的状态

1.redis 安装配置完成，修改了端口，修改

daemonize yes

cluster-enabled yes

2.安装了ruby的运行环境

yum install ruby

yum install rubygems

3.安装了ruby脚本运行使用的包

Windows环境下下载redis-3.0.0.gem，并上传至服务器

gem install redis-3.0.0.gem

4.拷贝了redis-trib.rb到目标文件下

此时此刻在192.168.25.137上执行ruby脚本搭建集群

./redis-trib.rb create --replicas 1 192.168.25.137:7000 192.168.25.138:7000 192.168.25.139:7000 192.168.25.137:7001 192.168.25.138:7001 192.168.25.139:7001

报错

>>> Creating cluster

Connecting to node 192.168.25.137:7000: OK

/usr/local/share/gems/gems/redis-3.0.0/lib/redis.rb:182: warning: wrong element type nil at 0 (expected array)

/usr/local/share/gems/gems/redis-3.0.0/lib/redis.rb:182: warning: ignoring wrong elements is deprecated, remove them explicitly

/usr/local/share/gems/gems/redis-3.0.0/lib/redis.rb:182: warning: this causes ArgumentError in the next release

。。。

。。。

。。。

Connecting to node 192.168.25.138:7000: [ERR] Sorry, can't connect to node 192.168.25.138:7000

2.主机间无法通信问题

Connecting to node 192.168.25.138:7000: [ERR] Sorry, can't connect to node 192.168.25.138:7000

测试192.168.25.137是否可以连接192.168.25.138:7000

[root@localhost redis_cluster]# telnet 192.168.25.138 7000

-bash: telnet: command not found

说明没有安装telnet

2.1安装telnet

1)首先检测安装了什么

[root@localhost redis_cluster]# rpm -qa telnet-server

[root@localhost redis_cluster]#

说明什么都没有装

2)安装telnet-server，telnet

先安装telnet-server

[root@localhost redis_cluster]# yum install telnet-server

再安装telnet

[root@localhost redis_cluster]# yum install telnet

3)重启xinetd

由于telnet服务也是由xinetd守护的，所以安装完telnet-server，要启动telnet服务就必须重新启动xinetd

[root@localhost redis_cluster]# systemctl restart xinetd.service

Failed to issue method call: Unit xinetd.service failed to load: No such file or directory.

[root@localhost redis_cluster]#

安装xinetd

[root@localhost redis_cluster]# yum install xinetd

[root@localhost redis_cluster]# telnet 192.168.25.138 7000

Trying 192.168.25.138...

telnet: connect to address 192.168.25.138: No route to host

[root@localhost redis_cluster]#

测试结果：192.168.25.137确实不可以连接192.168.25.138:7000

2.2检查防火墙

[root@localhost redis_cluster]# firewall-cmd --state

not running

防火墙没开，那就不存在端口被限制的情况

经多方查找，重新启动防火墙，然后再次关闭防火墙，即可

[root@localhost redis_cluster]# telnet 192.168.25.138 7000

Trying 192.168.25.138...

Connected to 192.168.25.138.

Escape character is '^]'.

^]

telnet> q

Connection closed.

[root@localhost redis_cluster]#

3.接下来的步骤

3.1在192.168.25.137上执行ruby脚本搭建集群

./redis-trib.rb create --replicas 1 192.168.25.137:7000 192.168.25.138:7000 192.168.25.139:7000 192.168.25.137:7001 192.168.25.138:7001 192.168.25.139:7001

>>> Performing hash slots allocation on 6 nodes...

Using 3 masters:

192.168.25.137:7000

192.168.25.138:7000

192.168.25.139:7000

Adding replica 192.168.25.138:7001 to 192.168.25.137:7000

Adding replica 192.168.25.137:7001 to 192.168.25.138:7000

Adding replica 192.168.25.139:7001 to 192.168.25.139:7000

M: 51cc4c3af645fc900c4a8bc575985b02682ec5fd 192.168.25.137:7000

slots:0-5460 (5461 slots) master

M: a047bdebca2e0c59848674cc06af269111c22876 192.168.25.138:7000

slots:5461-10922 (5462 slots) master

M: 1c5c95884c210e8da711554ce60f8e38a21262ac 192.168.25.139:7000

slots:10923-16383 (5461 slots) master

S: f886fcf843e0cde7e6418dff509db31c0c905294 192.168.25.138:7001

replicates 51cc4c3af645fc900c4a8bc575985b02682ec5fd

S: 0185165fdb8f043cbecb7c88354e7ee038df89de 192.168.25.137:7001

replicates a047bdebca2e0c59848674cc06af269111c22876

S: 3bf36d099c13d545b6b2e7c66c3c9b2520cb07a4 192.168.25.139:7001

replicates 1c5c95884c210e8da711554ce60f8e38a21262ac

Can I set the above configuration? (type 'yes' to accept): yes

>>> 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 192.168.25.137:7000)

M: 51cc4c3af645fc900c4a8bc575985b02682ec5fd 192.168.25.137:7000

slots:0-5460 (5461 slots) master

M: a047bdebca2e0c59848674cc06af269111c22876 192.168.25.138:7000

slots:5461-10922 (5462 slots) master

M: 1c5c95884c210e8da711554ce60f8e38a21262ac 192.168.25.139:7000

slots:10923-16383 (5461 slots) master

M: f886fcf843e0cde7e6418dff509db31c0c905294 192.168.25.138:7001

slots: (0 slots) master

replicates 51cc4c3af645fc900c4a8bc575985b02682ec5fd

M: 0185165fdb8f043cbecb7c88354e7ee038df89de 192.168.25.137:7001

slots: (0 slots) master

replicates a047bdebca2e0c59848674cc06af269111c22876

M: 3bf36d099c13d545b6b2e7c66c3c9b2520cb07a4 192.168.25.139:7001

slots: (0 slots) master

replicates 1c5c95884c210e8da711554ce60f8e38a21262ac

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

[root@localhost redis_cluster]# ll

3.2 使用Redis-cli连接集群

[root@localhost redis]# ./redis-cli -h 192.168.25.138 -p 7000 -c

192.168.25.138:7000> set a 1

-> Redirected to slot [15495] located at 192.168.25.139:7000

OK

192.168.25.139:7000> set b 2

-> Redirected to slot [3300] located at 192.168.25.137:7000

OK

192.168.25.137:7000> set c 3

-> Redirected to slot [7365] located at 192.168.25.138:7000

OK

192.168.25.138:7000> set d 4

-> Redirected to slot [11298] located at 192.168.25.139:7000

OK

192.168.25.139:7000> keys *

1) "a"

2) "d"

192.168.25.139:7000> set f 12

-> Redirected to slot [3168] located at 192.168.25.137:7000

OK

192.168.25.137:7000> keys *

1) "f"

2) "b"

192.168.25.137:7000> quit

[root@localhost redis]#