Ubuntu 15.10下Redis集群部署文档
（要让集群正常工作至少需要3个主节点，在这里我们要创建6个redis节点，其中三个为主节点，三个为从节点，对应的redis节点的ip和端口对应关系如下）
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
1：下载redis。官网下载3.0.0版本，之前2.几的版本不支持集群模式
下载地址：http://download.redis.io/releases/redis-3.0.7.tar.gz
2：上传服务器，解压，编译
tar -zxvf redis-3.0.7.tar.gz mv redis-3.0.7 /usr/local/redis3.0 cd /usr/local/redis3.0 make
之后就生成了 redis-server redis-client 等文件在 src里。
3：创建集群需要的目录
mkdir -p /usr/local/cluster cd /usr/local/cluster mkdir 7000 mkdir 7001 mkdir 7002 mkdir 7003 mkdir 7004 mkdir 7005
4：修改配置文件redis.conf
cp /usr/local/redis3.0/redis.conf /usr/local/cluster
vi redis.conf
##修改配置文件中的下面选项
pidfile /var/run/redis.7000.pid #个性化 port 7000 #个性化 daemonize yes cluster-enabled yes cluster-config-file nodes.7000.conf #个性化 cluster-node-timeout 5000 appendonly yes appendfilename "appendonly.7000.aof" #个性化
##修改完redis.conf配置文件中的这些配置项之后把这个配置文件分别拷贝到7000/7001/7002/7003/7004/7005目录下面
cp /usr/local/cluster/redis.conf /usr/local/cluster/7000 cp /usr/local/cluster/redis.conf /usr/local/cluster/7001 cp /usr/local/cluster/redis.conf /usr/local/cluster/7002 cp /usr/local/cluster/redis.conf /usr/local/cluster/7003 cp /usr/local/cluster/redis.conf /usr/local/cluster/7004 cp /usr/local/cluster/redis.conf /usr/local/cluster/7005
##注意：拷贝完成之后要修改7001/7002/7003/7004/7005目录下面redis.conf文件中 标注个性化的 参数，分别改为对应的文件夹的名称
5：分别启动这6个redis实例
vi /usr/local/cluster/redis-start.sh
加入以下内容
#!/bin/sh /usr/local/redis3.0/src/redis-server /usr/local/cluster/7000/redis.conf & /usr/local/redis3.0/src/redis-server /usr/local/cluster/7001/redis.conf & /usr/local/redis3.0/src/redis-server /usr/local/cluster/7002/redis.conf & /usr/local/redis3.0/src/redis-server /usr/local/cluster/7003/redis.conf & /usr/local/redis3.0/src/redis-server /usr/local/cluster/7004/redis.conf & /usr/local/redis3.0/src/redis-server /usr/local/cluster/7005/redis.conf &
然后
chmod +x /usr/local/cluster/redis-start /usr/local/cluster/redis-start
##启动之后使用命令查看redis的启动情况ps -ef|grep redis
6：执行redis的创建集群命令创建集群
安装ruby ,因为./redis-trib.rb 是执行的ruby的脚本，需要ruby的环境
sudo apt-get install ruby
为了执行 redis-trib.rb 需要安装 gem redis sudo gem install redis 可能会有长城防火墙的问题
可以去https://rubygems.org/gems/redis/versions/3.2.2 下载最新版本。
然后用命令 sudo gem install redis-3.2.2.gem
cd /usr/local/redis3.0/src ./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
有下面输出表示成功了。
>>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 Adding replica 127.0.0.1:7003 to 127.0.0.1:7000 Adding replica 127.0.0.1:7004 to 127.0.0.1:7001 Adding replica 127.0.0.1:7005 to 127.0.0.1:7002 M: 1cdc6971ddbcf64427a9499e19b048afa55aff08 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: a355b2ccb1fdf413652a14cec722076af958a079 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 0bc286b514d36e7195142ff0d55a87542048b5a9 127.0.0.1:7002 slots:10923-16383 (5461 slots) master S: a3b7c85fe957917bd383b181de3f1a3f31df8a05 127.0.0.1:7003 replicates 1cdc6971ddbcf64427a9499e19b048afa55aff08 S: 9f0f4045497a72b64783fd9c2387f38b7e3bda6c 127.0.0.1:7004 replicates a355b2ccb1fdf413652a14cec722076af958a079 S: f4b371c4e1d0fddfbe1552e540ddd36a5a00200b 127.0.0.1:7005 replicates 0bc286b514d36e7195142ff0d55a87542048b5a9 Can I set the above configuration? (type 'yes' to accept): yes >>> Nodes configuration updated >>> Assign a different config epoch to each node >>> Sending CLUSTER MEET messages to join the cluster Waiting for the cluster to join... >>> Performing Cluster Check (using node 127.0.0.1:7000) M: 1cdc6971ddbcf64427a9499e19b048afa55aff08 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: a355b2ccb1fdf413652a14cec722076af958a079 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 0bc286b514d36e7195142ff0d55a87542048b5a9 127.0.0.1:7002 slots:10923-16383 (5461 slots) master M: a3b7c85fe957917bd383b181de3f1a3f31df8a05 127.0.0.1:7003 slots: (0 slots) master replicates 1cdc6971ddbcf64427a9499e19b048afa55aff08 M: 9f0f4045497a72b64783fd9c2387f38b7e3bda6c 127.0.0.1:7004 slots: (0 slots) master replicates a355b2ccb1fdf413652a14cec722076af958a079 M: f4b371c4e1d0fddfbe1552e540ddd36a5a00200b 127.0.0.1:7005 slots: (0 slots) master replicates 0bc286b514d36e7195142ff0d55a87542048b5a9 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
这样redis-cluster集群就启动了
7、查看集群目前状况：
$ redis-cli -c -p 7000 127.0.0.1:7000> cluster info cluster_state:ok cluster_slots_assigned:16384 cluster_slots_ok:16384 cluster_slots_pfail:0 cluster_slots_fail:0 cluster_known_nodes:6 cluster_size:3 cluster_current_epoch:0 cluster_stats_messages_sent:8770 cluster_stats_messages_received:8770
8、测试存值取值：每一次操作过后可能就跳到别的里面了。就是那个Redirected to slot ……
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