redis cluster集群

端口号：7000-7005

1. 安装集群插件

EPEL源安装ruby支持
yum install ruby rubygems -y

使用国内源
gem sources -l
gem sources -a http://mirrors.aliyun.com/rubygems/ 
gem sources  --remove https://rubygems.org/
gem sources -l
gem install redis -v 3.3.3

2. 集群节点准备

mkdir /data/700{0..5}

cat >> /data/7000/redis.conf << EOF
port 7000
daemonize yes
pidfile /data/7000/redis.pid
loglevel notice
logfile "/data/7000/redis.log"
dbfilename dump.rdb
dir /data/7000
protected-mode no
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
EOF

cp /data/7000/redis.conf /data/7001/redis.conf
cp /data/7000/redis.conf /data/7002/redis.conf
cp /data/7000/redis.conf /data/7003/redis.conf
cp /data/7000/redis.conf /data/7004/redis.conf
cp /data/7000/redis.conf /data/7005/redis.conf

sed -i 's#7000#7001#g' /data/7001/redis.conf
sed -i 's#7000#7002#g' /data/7002/redis.conf
sed -i 's#7000#7003#g' /data/7003/redis.conf
sed -i 's#7000#7004#g' /data/7004/redis.conf
sed -i 's#7000#7005#g' /data/7005/redis.conf

启动节点：

redis-server /data/7000/redis.conf 
redis-server /data/7001/redis.conf 
redis-server /data/7002/redis.conf 
redis-server /data/7003/redis.conf 
redis-server /data/7004/redis.conf 
redis-server /data/7005/redis.conf 



[root@db01 ~]# ps -ef |grep redis
root       8854      1  0 03:56 ?        00:00:00 redis-server *:7000 [cluster]     
root       8858      1  0 03:56 ?        00:00:00 redis-server *:7001 [cluster]     
root       8860      1  0 03:56 ?        00:00:00 redis-server *:7002 [cluster]     
root       8864      1  0 03:56 ?        00:00:00 redis-server *:7003 [cluster]     
root       8866      1  0 03:56 ?        00:00:00 redis-server *:7004 [cluster]     
root       8874      1  0 03:56 ?        00:00:00 redis-server *:7005 [cluster]  

3. 将节点加入集群管理

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

4. 集群状态查看

集群主节点状态
redis-cli -p 7000 cluster nodes | grep master
集群从节点状态
redis-cli -p 7000 cluster nodes | grep slave

5. 集群节点管理

1. 增加新的节点

   mkdir /data/7006
   mkdir /data/7007
   
   vim /data/7006/redis.conf
   port 7006
   daemonize yes
   pidfile /data/7006/redis.pid
   loglevel notice
   logfile "/data/7006/redis.log"
   dbfilename dump.rdb
   dir /data/7006
   protected-mode no
   cluster-enabled yes
   cluster-config-file nodes.conf
   cluster-node-timeout 5000
   appendonly yes
   
   
   vim /data/7007/redis.conf
   port 7007
   daemonize yes
   pidfile /data/7007/redis.pid
   loglevel notice
   logfile "/data/7007/redis.log"
   dbfilename dump.rdb
   dir /data/7007
   protected-mode no
   cluster-enabled yes
   cluster-config-file nodes.conf
   cluster-node-timeout 5000
   appendonly yes
   
   
   redis-server /data/7006/redis.conf 
   redis-server /data/7007/redis.conf 
   

2. 添加主节点

   redis-trib.rb add-node 127.0.0.1:7006 127.0.0.1:7000
   

3. 转移slot（重新分片）

   redis-trib.rb reshard 127.0.0.1:7000
   

4. 添加一个从节点

    
   redis-trib.rb add-node --slave --master-id 1c98b2b2ce18f88c76821cdb82dba4defaa5eb48 127.0.0.1:7007 127.0.0.1:7000
    
   

6. 删除节点

1. 将需要删除节点slot移动走

   redis-trib.rb reshard 127.0.0.1:7000
   

2. 删除一个节点

   删除master节点之前首先要使用reshard移除master的全部slot,然后再删除当前节点
   ot,然后再删除当前节点
   redis-trib.rb del-node 127.0.0.1:7006 1c98b2b2ce18f88c76821cdb82dba4defaa5eb48
   redis-trib.rb del-node 127.0.0.1:7007 00185d1cf069b23468d5863202ac651f0d02a9f8
   

7. 设置redis最大内存

config set maxmemory 102400000