一.Redis的安裝和主從配置

實驗環境：rhel6.5     

主機：server{1..4}   ip：172.25.254.{1..4}

1.在server1和server2上下載redis安裝包，解壓，編譯，安裝

tar zxf redis-4.0.8.tar.gz 
yum install -y gcc
make&&make install
cd utils/
./install_server.sh  #啟動指令碼

2.server1修改監聽埠

[[email protected] utils]# redis-cli   #檢視安裝資訊        
[
 
[email protected] udev]# cd /etc/redis/
[[email protected] redis]# vim 6379.conf   #監聽埠改為0.0.0.0，有什麼監聽什麼

netstat檢視服務埠是否開啟

3.server2上修改配置檔案

[[email protected] redis]# vim 6379.conf 
[[email protected] redis]# /etc/init.d/redis_6379 restart   #重啟
Stopping ...
Redis stopped
Starting Redis server...
 

4.測試，在server1上設定變數，server2上進行了同步

二.redis叢集實現高可用

1.在上一步d的基礎上在開啟兩個虛擬機器server3，用於實現redis的高可用

2.在3上安裝redis，實現主從，get name可以看到主的訊息

3.配置檔案複製到redis目錄下

[[email protected] redis-4.0.8]# cp sentinel.conf /etc/redis/
[[email protected] redis-4.0.8]# cd /etc/redis/

 [[email protected] ~]# vim /etc/redis/sentinel.conf 
17 protected-mode no        #保護模式
 21 port 26379
 69 sentinel monitor mymaster 172.25.254.1 6379 2  
#sentinel監聽主機的ip和6379埠，必須至少有兩個連線才能故障切換
 98 sentinel down-after-milliseconds mymaster 10000
#預設30s沒有反應，認為伺服器斷開
 

複製到叢集的每一個結點上，scp

4.在任意一臺中可以監聽

redis的主是server1,slave為2，3

redis-server /etc/redis/sentinel.conf –sentinel   #監控命令，檢視master和slave

5.手動停止server1

redis-cli  

shutdown

監控檢視server1--->server2

叢集中master變為server2，server2的配置檔案也變為server2

三.叢集管理工具

1.寫redis的配置目錄，建立不同的程序，redis.conf複製到每一個700{1..6}  目錄中，

redis-server 700{1..6}/redis.conf   #開啟，生效

cd /usr/local
mkdir cluster
cd cluster
mkdir 700{1..6}
cd 7001
vim redis.conf
port 7000        #每一個不一樣
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000  #超時
appendonly yes
 
redis-cli -p 7001  #檢視狀態

[[email protected]rver1 ~]# redis-trib.rb --help
/usr/bin/env: ruby: No such file or directory

[[email protected] ~]# yum install -y ruby

[[email protected] ~]# redis-trib.rb --help
/usr/local/bin/redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError)
	from /usr/local/bin/redis-trib.rb:24
[[email protected] ~]# yum install -y rubygems-1.3.7-5.el6.noarch.rpm

[[email protected] ~]# redis-trib.rb --help
/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 /usr/local/bin/redis-trib.rb:25
[[email protected] ~]# gem list

*** LOCAL GEMS ***


[[email protected] ~]# gem --help
RubyGems is a sophisticated package manager for Ruby.  This is a
basic help message containing pointers to more information.

  Usage:
    gem -h/--help
    gem -v/--version
    gem command [arguments...] [options...]

  Examples:
    gem install rake
    gem list --local
    gem build package.gemspec
    gem help install

  Further help:
    gem help commands            list all 'gem' commands
    gem help examples            show some examples of usage
    gem help platforms           show information about platforms
    gem help <COMMAND>           show help on COMMAND
                                   (e.g. 'gem help install')
    gem server                   present a web page at
                                 http://localhost:8808/
                                 with info about installed gems
  Further information:
    http://rubygems.rubyforge.org
[[email protected] ~]# gem   install  --local redis-4.0.1.gem 
ERROR:  Error installing redis-4.0.1.gem:
	redis requires Ruby version >= 2.2.2.
[[email protected] ~]# rpm -q ruby
ruby-1.8.7.352-12.el6_4.x86_64
[[email protected] ~]# yum install ruby-2.2.3-1.el6.x86_64.rpm libyaml-0.1.3-4.el6_6.x86_64.rpm -y

[[email protected] ~]# gem   install  --local redis-4.0.1.gem 
Successfully installed redis-4.0.1
Parsing documentation for redis-4.0.1
Installing ri documentation for redis-4.0.1
Done installing documentation for redis after 1 seconds
1 gem installed

[[email protected] ~]# gem list

*** LOCAL GEMS ***

bigdecimal (1.2.6)
io-console (0.4.3)
json (1.8.1)
minitest (5.4.3)
power_assert (0.2.2)
psych (2.0.8)
rake (10.4.2)
rdoc (4.2.0)
redis (4.0.1)
test-unit (3.0.8)

[[email protected] ~]# redis-trib.rb create --replicas 1 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006

Yes確認新增
[[email protected] ~]# redis-trib.rb info 127.0.0.1:7002
[[email protected] ~]# redis-trib.rb  check 127.0.0.1:7001

[[email protected] ~]# redis-cli -c -p 7001
127.0.0.1:7001> set name xue   7001上設定name等於xue
-> Redirected to slot [5798] located at 127.0.0.1:7002
OK
127.0.0.1:7002> get name
"xue" 

[[email protected] ~]# redis-cli -c -p 7006
127.0.0.1:7006> get name    -> Redirected to slot [5798] located at 127.0.0.1:7002
"xue"
127.0.0.1:7002> set user westos  7006上改了名字
OK
127.0.0.1:7002> get user       7002查到改了的名字
"westos"

[[email protected] ~]# redis-cli -c -p 7004
127.0.0.1:7004> get user
-> Redirected to slot [5474] located at 127.0.0.1:7002
"westos"
127.0.0.1:7002> del user    #刪除之後名字沒有了
(integer) 1
127.0.0.1:7002> get user
(nil)
127.0.0.1:700

[[email protected] ~]# redis-cli -c -p 7004    1,4互相為主從
127.0.0.1:7004> SHUTDOWN
not connected> 
[[email protected] ~]# ps ax
[[email protected] ~]# redis-cli -c -p 7001
127.0.0.1:7001> get name
-> Redirected to slot [5798] located at 127.0.0.1:7002
"xue"
127.0.0.1:7002>