centOS下安裝Redis

一，單機模式
1，下載安裝包
wget http://download.redis.io/releases/redis-4.0.2.tar.gz
2，解壓安裝包並安裝
tar -zxvf redis-4.0.2.tar.gz
cd redis-4.0.2
make

報錯：jemalloc/jemalloc.h:沒有那個文件或目錄，執行make MALLOC=libc
cd /usr/local/redis-4.0.2/src
make install
3，創建兩個文件夾用於存放redis配置和命令文件
mkdir -p /usr/local/redis/etc
mkdir -p /usr/local/redis/bin
4,將redis配置和命令文件放入到新建的文件夾下
cd /usr/local/redis-4.0.2
cp redis.conf /usr/local/redis/etc
cd /usr/local/redis-4.0.2/src
mv mkreleasehdr.sh redis-benchmark redis-check-aof redis-check-rdb redis-cli redis-server /usr/local/redis/bin
5，啓動時並指定配置文件
前臺啓動：/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf

6，驗證啓動是否成功：
ps -ef |grep 6379
netstat -tunpl| grep redis
7，修改後臺啓動
vim /usr/local/redis/etc/redis.conf
daemonize yes 使Redis以守護進程模式運行
8，中止Redis
/usr/local/redis/bin/redis-cli SHUTDOWN

二，主從複製模式（讀寫分離：主可寫，從只讀）
規劃：101主節點，102,103從節點

1. 遠程遞歸copy
   登錄101服務並cd /usr/local/
   scp -r redis-4.0.2/ 192.168.0.102:/usr/local/
   scp -r redis/ 192.168.0.102:/usr/local/
   scp -r redis-4.0.2/ 192.168.0.103:/usr/local/
   scp -r redis/ 192.168.0.103:/usr/local/
   2.修改從節點102,103配置文件
   vim /usr/local/redis/etc/redis.conf
   修改如下內容
   #Redis使用後臺模式
   daemonize yes
   slaveof 192.168.0.101 6379
   #關閉保護模式
   protected-mode no
   #註釋如下內容開啓遠程訪問
   #bind 127.0.0.1
   3.修改101配置文件
   daemonize yes
   #關閉保護模式
   protected-mode no
   #註釋如下內容開啓遠程訪問
   #bind 127.0.0.1
   4.重啓服務
   進入101客戶端
   redis客戶端命令：/usr/local/redis/bin/redis-cli
   經過info查看節點信息
   
   進入102客戶端
   redis客戶端命令：/usr/local/redis/bin/redis-cli
   經過info查看節點信息
   

三，哨兵模式
規劃：將102做爲哨兵的部署服務器如下操做是在102服務器上操做
（1）copy文件 sentinel.conf到/usr/local/redis/etc/中
cd /usr/local/redis-4.0.2
cp sentinel.conf /usr/local/redis/etc
（2）修改 sentinel.con文件：
vim /usr/local/redis/etc/sentinel.conf
sentinel monitor mymaster 192.168.1.101 6379 1
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 900000
sentinel parallel-syncs mymaster 2
（3）啓動 sentinel哨兵
/usr/local/redis/bin/redis-server /usr/local/redis/etc/sentinel.conf --sentinel &
（4）查看哨兵相關信息命令
/usr/local/redis/bin/redis-cli -h 192.168.0.102 -p 26379 info Sentinel
這裏報錯：
(error) DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified,
no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface.
If you want to connect from external computers to Redis you may adopt one of the following solutions:
1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent.
2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server.
3) If you started the server manually just for testing, restart it with the '--protected-mode no' option.
4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.
修改sentinel.conf文件
vim /usr/local/redis/etc/sentinel.conf
#bind 127.0.0.1
protected-mode no
對應的101,102,103的redis.conf配置文件也要這樣配置
reboot重啓服務再次執行
/usr/local/redis/bin/redis-cli -h 192.168.0.102 -p 26379 info Sentinel

（5）關閉主服務器查看集羣信息：
/usr/local/redis/bin/redis-cli -h 192.168.0.101 -p 6379 shutdown
master節點轉移成功（其實質修改了對應redis.conf配置文件的參數slaveof）