比Redis-cluster还好的redis分布式集群（twemproxy代理）

1 了解一致性哈希算法
2 Redis-cluster的不足

配合keepalive会更好

1 准备6台redis(至少3台))

2 修改配置（6分）

bind 192.168.8.128
protected-mode yes
port 8601
daemonize yes
appendonly yes

3启动

/usr/local/twemproxy-redis/redis01/bin/redis-server /usr/local/twemproxy-redis/redis01/etc/redis.conf
/usr/local/twemproxy-redis/redis02/bin/redis-server /usr/local/twemproxy-redis/redis02/etc/redis.conf
/usr/local/twemproxy-redis/redis03/bin/redis-server /usr/local/twemproxy-redis/redis03/etc/redis.conf
/usr/local/twemproxy-redis/redis04/bin/redis-server /usr/local/twemproxy-redis/redis04/etc/redis.conf
/usr/local/twemproxy-redis/redis05/bin/redis-server /usr/local/twemproxy-redis/redis05/etc/redis.conf
/usr/local/twemproxy-redis/redis06/bin/redis-server /usr/local/twemproxy-redis/redis06/etc/redis.conf

安装 （参考 https://www.cnblogs.com/gomysql/p/4413922.html）

yum -y install autoconf automake libtool

unzip twemproxy-master.zip
cd twemproxy-master
autoreconf -fvi
./configure --prefix=/usr/local/twemproxy-redis
make
make install

创建文件夹

mkdir conf run

创建配置文件

vim /usr/local/twemproxy-redis/conf/nutcracker.yml

alpha:
  listen: 192.168.8.130:22121
  hash: fnv1a_64
  distribution: ketama
  auto_eject_hosts: true
  redis: true
  server_retry_timeout: 2000
  server_failure_limit: 1
  servers:
 - 192.168.8.130:8601:1
  - 192.168.8.130:8602:1
  - 192.168.8.130:8603:1
  - 192.168.8.130:8604:1
  - 192.168.8.130:8605:1
  - 192.168.8.130:8606:1

测试配置文件

[root@localhost twemproxy-redis]# ./sbin/nutcracker -t
nutcracker: configuration file 'conf/nutcracker.yml' syntax is ok

启动twemproxy

./sbin/nutcracker  -d -c /usr/local/twemproxy-redis/conf/nutcracker.yml -p /usr/local/twemproxy-redis/run/redisproxy.pid -o /usr/local/twemproxy-redis/run/redisproxy.log

ps -ef |grep nutcracker
root 21457  14891  0 21:12 pts/1    00:00:00 grep --color=auto nutcracker

测试连接

[root@localhost redis01]# ./bin/redis-cli   -h 192.168.8.130 -p 22121

测试 B 和 QFF 在 8605 上面 关闭redis 8065测试 B 和 QFF 在 8605 上面 关闭redis 8065

2个pid

依然可以正常访问

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