redis环境搭建
因为工作环境中有redis，所以对redis进行了学习，当然首先就是从搭建环境开始，下面是我对于搭建redis环境的记录。系统是SuSE 11 sp2,
软件环境如下所示：
linux-svnfile:/home/apps/redis # ls
redis-3.0.0.gem ruby-1.9.2-p290.tar.gzzlib-1.2.7.tar.gz
redis-3.0.0.tar.gzrubygems-2.4.6.tgz
redis.conf zlib-1.2.6.tar.gz
安装基础环境：
linux-svnfile:/home/apps/redis # tar -zxf zlib-1.2.6.tar.gz -C /usr/local/src
linux-svnfile:/usr/local/src/zlib-1.2.6 # ./configure --prefix=/usr/local/zlib
linux-svnfile:/usr/local/src/zlib-1.2.6 # make && make install
linux-svnfile:/home/apps/redis # tar -zxf ruby-1.9.2-p290.tar.gz -C /usr/local/src
linux-svnfile:/usr/local/src/ruby-1.9.2-p290 # ./configure --prefix=/usr/local/ruby
linux-svnfile:/usr/local/src/ruby-1.9.2-p290 # make && make install
linux-svnfile:/usr/local/ruby # ln -s /usr/local/ruby/bin/ruby /usr/local/bin
linux-svnfile:/home/apps/redis # tar xf rubygems-2.4.6.tgz -C /usr/local/src
linux-svnfile:/usr/local/src # mv rubygems-2.4.6 ../gem
linux-svnfile:/usr/local/gem # ruby setup.rb
linux-svnfile:/usr/local/gem # cp bin/gem /usr/local/bin/
linux-svnfile:/home/apps/redis # gem install -l redis-3.0.0.gem
Successfully installed redis-3.0.0
Installing ri documentation for redis-3.0.0
Done installing documentation for redis after 0 seconds
1 gem installed
linux-svnfile:/home/apps/redis # tar -zxf redis-3.0.0.tar.gz -C /usr/local/src
linux-svnfile:/usr/local/src # mv redis-3.0.0 ../redis
linux-svnfile:/usr/local/redis # make
至此基础环境搭建完成
下面进行集群的搭建
linux-svnfile:/usr/local/redis # cp src/redis-server /usr/local/bin/
linux-svnfile:/usr/local/redis # cp src/redis-cli /usr/local/bin/
linux-svnfile:/usr/local/redis # cp src/redis-trib.rb /usr/local/bin
linux-svnfile:/usr/local/redis # mkdir -p /usr/local/cluster/{7000..7005}
linux-svnfile:/usr/local/redis # vi redis.conf
daemonize yes
port 7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7000
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7001
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7002
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7003
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7004
linux-svnfile:/usr/local/redis # cp redis.conf ../cluster/7005
这里需要注意的是文件名对应文件里端口的配置，例如7001文件下的port参数需要改为7001，其他一样做修改。
linux-svnfile:/usr/local/redis # redis-server ../cluster/7000/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7001/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7002/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7003/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7004/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7005/redis.conf
linux-svnfile:/usr/local/redis # ps -ef | grep redis
root 15590 10 18:52 ? 00:00:00 redis-server *:7000
linux-svnfile:/usr/local/redis # 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
>>> Creating cluster
Connecting to node 127.0.0.1:7000: OK
Connecting to node 127.0.0.1:7001: Sorry, can't connect to node 127.0.0.1:7001
You have new mail in /var/mail/root
linux-svnfile:/usr/local/cluster/7000 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7000 # cd ../7001
linux-svnfile:/usr/local/cluster/7001 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7001 # cd ../7002
linux-svnfile:/usr/local/cluster/7002 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7002 # cd ../7003
linux-svnfile:/usr/local/cluster/7003 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7003 # cd ../7004
linux-svnfile:/usr/local/cluster/7004 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7004 # cd ../7005
linux-svnfile:/usr/local/cluster/7005 # redis-server redis.conf
linux-svnfile:/usr/local/cluster/7005 # ps -ef | grep redis
root 17575 10 20:05 ? 00:00:00 redis-server *:7000
root 17590 10 20:06 ? 00:00:00 redis-server *:7001
root 17604 10 20:06 ? 00:00:00 redis-server *:7002
root 17612 10 20:06 ? 00:00:00 redis-server *:7003
root 17616 10 20:06 ? 00:00:00 redis-server *:7004
root 17624 10 20:06 ? 00:00:00 redis-server *:7005
像是上面在启动服务时需要注意切换到相应的配置文件的目录下，不然相应端口的服务无法启动，例如我之前在/usr/local/redis目录下启动后只有7000对应的服务启动了。
linux-svnfile:/usr/local/redis # redis-server ../cluster/7000/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7001/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7002/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7003/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7004/redis.conf
linux-svnfile:/usr/local/redis # redis-server ../cluster/7005/redis.conf
linux-svnfile:/usr/local/redis # ps -ef | grep redis
root 15144 190640 18:37 pts/0 00:00:00 vi redis.conf
root 15590 10 18:52 ? 00:00:00 redis-server *:7000
root 15616 194430 18:52 pts/1 00:00:00 grep redis
linux-svnfile:/usr/local/cluster #redis-cli -p 7000
127.0.0.1:7000>
删除slave节点
删除master节点
linux-svnfile:/usr/local/redis # redis-trib.rb reshard 127.0.0.1:7001
How many slots do you want to move (from 1 to 16384)? 5461
What is the receiving node>
Please enter all the source node> Type 'all' to use all the nodes as source nodes for the hash slots.
Type 'done' once you entered all the source nodes> Source node #1: 6fe9561e605b7ee85e67a2557f7fb641f482afb4
Source node #2:done
#Do you want to proceed with the proposed reshard plan (yes/no)? yes
说明：
5461表示要删除master所有的slot数量
What is the receiving node ID是指将7000的slot迁移的节点7001的node-id
Source node #1是指要删除的master的node-id
下面可以看到7000的slot为0，而7001多了4561
在删除master节点出现如下面所示的错误，是因为删除master节点之前没有删除master节点的slave节点。
上面是在单台机器上做的集群，下面展示两台机器上做集群，其实也很简单。
参考之前的环境编译源码到另一台机器
在两台机器上编辑配置文件
/usr/local/redis # vi redis.conf
daemonize yes
port 7000
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
cluster-config-file nodes-7001.conf
分别创建目录和文件
linux-svnfile:/usr/local/redis # mkdir -p/usr/local/cluster/{7001..7003}
localhost:/usr/local/redis # mkdir -p/usr/local/cluster/{8001..8003}
linux-svnfile:/usr/local/redis # cpredis.conf ../cluster/7001
linux-svnfile:/usr/local/redis # cpredis.conf ../cluster/7002
linux-svnfile:/usr/local/redis # cpredis.conf ../cluster/7003
localhost:/usr/local/redis # cp redis.conf../cluster/8001
localhost:/usr/local/redis # cp redis.conf../cluster/8002
localhost:/usr/local/redis # cp redis.conf../cluster/8003
修改对应目录的配置文件其中port 和cluster-config-file分别对应各自的目录名，可使用sed命令做修改
sed -i "s/7001/7002/g"
启动服务
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