redis－主从集群的搭建

目标：

搭建一个redis 集群（一主三从）

master 下挂 slaveA,slaveB

其中：slaveB下挂slaveC

准备 sudo wget http://download.redis.io/releases/redis-3.2.6.tar.gz
sudo tar -xzvf redis-2.8.13.tar.gz
cd redis-2.8.13/src 生成可执行文件： sudo make 复制实例以及配置 sudo cp /home/q/www/redis/redis-2.8.13/src/redis-server .
sudo cp /home/q/www/redis/redis-2.8.13/src/redis-cli .
sudo cp /home/q/www/redis/redis-2.8.13/src/redis-benchmark .
sudo cp /home/q/www/redis/redis-2.8.13/redis.conf . 复制：

sudo cp redis.conf redis_A.conf

sudo cp redis.conf redis_B.conf

sudo cp redis.conf redis_C.conf

修改各自实例的端口号：

A：port 6380

B: port 6381

C: port 6382

修改主从配置：

A：slaveof 127.0.0.1 6379

B: slaveof 127.0.0.1 6379

C: slaveof 127.0.0.1 6380

启动实例： nohup sudo ./redis-server redis.conf &
nohup sudo ./redis-server redis_A.conf &
nohup sudo ./redis-server redis_B.conf &
nohup sudo ./redis-server redis_C.conf & 测试： sudo ./redis-cli -h 127.0.0.1 -p 6379
127.0.0.1:6379> set name xinchun.wang
OK
[xinchun.wang@l-*.f.dev.cn6 ~/redis]$ sudo ./redis-cli -h 127.0.0.1 -p 6380
127.0.0.1:6380> get name
"xinchun.wang"
127.0.0.1:6380>
[xinchun.wang@l-*.f.dev.cn6 ~/redis]$ sudo ./redis-cli -h 127.0.0.1 -p 6381
127.0.0.1:6381> get name
"xinchun.wang"
127.0.0.1:6381>
[xinchun.wang@l-*.f.dev.cn6 ~/redis]$ sudo ./redis-cli -h 127.0.0.1 -p 6382
127.0.0.1:6382> get name
"xinchun.wang"

主从配置完毕！

继续了解：

127.0.0.1:6379> info

# Replication
role:master
connected_slaves:2
slave0:ip=127.0.0.1,port=6380,state=online,offset=976,lag=0
slave1:ip=127.0.0.1,port=6381,state=online,offset=976,lag=0

注意：

role:master connected_slaves:2

127.0.0.1:6380> info

# Replication
role:slave
master_host:127.0.0.1
master_port:6379
master_link_status:up
master_last_io_seconds_ago:7
master_sync_in_progress:0
slave_repl_offset:1046
slave_priority:100
slave_read_only:1
connected_slaves:0

127.0.0.1:6381> info

# Replication
role:slave
master_host:127.0.0.1
master_port:6379
master_link_status:up
master_last_io_seconds_ago:2
master_sync_in_progress:0
slave_repl_offset:2768
slave_priority:100
slave_read_only:1
connected_slaves:1
slave0:ip=127.0.0.1,port=6382,state=online,offset=2754,lag=0