linux单节点安装redis三主三从

前言：一台服务器上安装三主三从，很少有公司这个做的，大部分都是三台服务器，每台服务器上面分别有主从。但都是大同小异

服务器IP：192.168.181.131

Redis版本：redis-3.2.1

Redis端口号：7000 7001 7002 7003 7004 7005

安装：

1）下载：http://download.redis.io/releases/redis-3.2.1.tar.gz

2）上传服务器、编译、安装

$yum -y install gcc
$ wget http://download.redis.io/releases/redis-3.2.1.tar.gz
$ tar xzf redis-3.2.1.tar.gz -C /opt
$cd /opt/redis-3.2.1
$make && make install PREFIX=/usr/local/redis-3.2.1

3）创建集群需要的目录并copy redis

$make /usr/local/cluster && cd /usr/local/cluster
$make -p 7000 7001 7002 7003 7004 7005

$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7000/
$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7001/
$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7002/
$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7003/
$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7004/
$cp -rf /usr/local/redis-3.2.1/* /usr/local/cluster/7005/

4）修改配置文件

$vim redis.conf

##修改配置文件中的下面选项
daemonize yes     //后台启动
pidfile　　　　　　
port 7001　　　　//默认是6379 ，更改端口号，每个节点都要更改成对应的端口号
bind
去掉注释：cluster-enabled yes
去掉注释并修改：cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
dbfilename
logfile

5）启动

$bin/redis-server ./redis.conf       //每个节点下都要执行，可以编写一个脚本进行启动

6）查看启动

$netstat -ntlp |grep 700

7) 安装ruby的环境
yum -y install ruby
yum -y install rubygems

wget https://rubygems.global.ssl.fastly.net/gems/redis-3.2.1.gem
gem install -l ./redis-3.2.1.gem

8) 

./redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005

>>> Creating cluster
Connecting to node 127.0.0.1:7000: OK
Connecting to node 127.0.0.1:7001: OK
Connecting to node 127.0.0.1:7002: OK
Connecting to node 127.0.0.1:7003: OK
Connecting to node 127.0.0.1:7004: OK
Connecting to node 127.0.0.1:7005: OK
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
127.0.0.1:7000
127.0.0.1:7001
127.0.0.1:7002
Adding replica 127.0.0.1:7003 to 127.0.0.1:7000
Adding replica 127.0.0.1:7004 to 127.0.0.1:7001
Adding replica 127.0.0.1:7005 to 127.0.0.1:7002
M: da948d59eb98684259edb1a077cde23d987f20a4 127.0.0.1:7000
slots:0-5460 (5461 slots) master
M: e23778b1eb90764ff1082793bf99a0a83be8c0d4 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
M: 3dcae6ec0a746ebb3325f3d4cdc40ae0d026a55f 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
S: e4d00a017a7049ef157a1af942adaa9093feb170 127.0.0.1:7003
replicates da948d59eb98684259edb1a077cde23d987f20a4
S: adb233ad50462f96b6c703a78e4355191bd98750 127.0.0.1:7004
replicates e23778b1eb90764ff1082793bf99a0a83be8c0d4
S: 7c381e82e8cad4dcdca4cd50f530cff063ad18f5 127.0.0.1:7005
replicates 3dcae6ec0a746ebb3325f3d4cdc40ae0d026a55f
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 127.0.0.1:7000)
M: da948d59eb98684259edb1a077cde23d987f20a4 127.0.0.1:7000
slots:0-5460 (5461 slots) master
M: e23778b1eb90764ff1082793bf99a0a83be8c0d4 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
M: 3dcae6ec0a746ebb3325f3d4cdc40ae0d026a55f 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
M: e4d00a017a7049ef157a1af942adaa9093feb170 127.0.0.1:7003
slots: (0 slots) master
replicates da948d59eb98684259edb1a077cde23d987f20a4
M: adb233ad50462f96b6c703a78e4355191bd98750 127.0.0.1:7004
slots: (0 slots) master
replicates e23778b1eb90764ff1082793bf99a0a83be8c0d4
M: 7c381e82e8cad4dcdca4cd50f530cff063ad18f5 127.0.0.1:7005
slots: (0 slots) master
replicates 3dcae6ec0a746ebb3325f3d4cdc40ae0d026a55f
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

 常出现的问题：

6,创建redis集群
cd /usr/local/redis-3.2.1/src
./redis-trib.rb create --replicas 1 IP1:7001 IP1:7002 IP2:7001 IP2:7002 IP3:7001 IP3:7002
./redis-trib.rb create --replicas 1 10.25.244.240:7001 10.25.244.240:7002 10.25.244.240:7003

**************************************************************************************
6.1执行上面的命令的时候会报错，因为是执行的的脚本，需要
错误内容：/usr/bin/env: ruby: No such file or directory
所以需要安装ruby的环境，这里推荐使用yum install ruby

#yum install ruby

6.2然后再执行第步的创建集群命令，还会报错，提示缺少rubygems组件
错误内容：
./redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError)
from ./redis-trib.rb:24

#yum install rubygems

6.3再次执行第步的命令，还会报错，提示不能加载redis，是因为缺少redis的接口
错误内容：
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- redis (LoadError)
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from ./redis-trib.rb:25

gem install redis
这里可能无法安装,因为无法连接gem服务器：
[@zw_22_90 src]# gem install redis --version 3.0.0
ERROR: Could not find a valid gem 'redis' (= 3.0.0) in any repository
ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)

需要手工下载并安装：
wget https://rubygems.global.ssl.fastly.net/gems/redis-3.2.1.gem
gem install -l ./redis-3.2.1.gem