Redis集群部署文档(Ubuntu15.10系统)

Redis集群部署文档(Ubuntu15.10系统)
（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..tar.gz
mv redis-3.0. /usr/local/redis3.
cd /usr/local/redis3.
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
mkdir
mkdir
mkdir
mkdir
mkdir 

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..pid #个性化
port  #个性化
daemonize yes
cluster-enabled yes
cluster-config-file nodes..conf #个性化
cluster-node-timeout
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/
cp /usr/local/cluster/redis.conf /usr/local/cluster/
cp /usr/local/cluster/redis.conf /usr/local/cluster/
cp /usr/local/cluster/redis.conf /usr/local/cluster/
cp /usr/local/cluster/redis.conf /usr/local/cluster/
cp /usr/local/cluster/redis.conf /usr/local/cluster/

##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./src/redis-server /usr/local/cluster//redis.conf &
/usr/local/redis3./src/redis-server /usr/local/cluster//redis.conf &
/usr/local/redis3./src/redis-server /usr/local/cluster//redis.conf &
/usr/local/redis3./src/redis-server /usr/local/cluster//redis.conf &
/usr/local/redis3./src/redis-server /usr/local/cluster//redis.conf &
/usr/local/redis3./src/redis-server /usr/local/cluster//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./src
./redis-trib.rb  create --replicas  127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1:

有下面输出表示成功了。

>>> Creating cluster
>>> Performing hash slots allocation on  nodes...
Using  masters:
127.0.0.1:
127.0.0.1:
127.0.0.1:
Adding replica 127.0.0.1: to 127.0.0.1:
Adding replica 127.0.0.1: to 127.0.0.1:
Adding replica 127.0.0.1: to 127.0.0.1:
M: 1cdc6971ddbcf64427a9499e19b048afa55aff08 127.0.0.1:
   slots:- ( slots) master
M: a355b2ccb1fdf413652a14cec722076af958a079 127.0.0.1:
   slots:- ( slots) master
M: 0bc286b514d36e7195142ff0d55a87542048b5a9 127.0.0.1:
   slots:- ( slots) master
S: a3b7c85fe957917bd383b181de3f1a3f31df8a05 127.0.0.1:
   replicates 1cdc6971ddbcf64427a9499e19b048afa55aff08
S: 9f0f4045497a72b64783fd9c2387f38b7e3bda6c 127.0.0.1:
   replicates a355b2ccb1fdf413652a14cec722076af958a079
S: f4b371c4e1d0fddfbe1552e540ddd36a5a00200b 127.0.0.1:
   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:)
M: 1cdc6971ddbcf64427a9499e19b048afa55aff08 127.0.0.1:
   slots:- ( slots) master
M: a355b2ccb1fdf413652a14cec722076af958a079 127.0.0.1:
   slots:- ( slots) master
M: 0bc286b514d36e7195142ff0d55a87542048b5a9 127.0.0.1:
   slots:- ( slots) master
M: a3b7c85fe957917bd383b181de3f1a3f31df8a05 127.0.0.1:
   slots: ( slots) master
   replicates 1cdc6971ddbcf64427a9499e19b048afa55aff08
M: 9f0f4045497a72b64783fd9c2387f38b7e3bda6c 127.0.0.1:
   slots: ( slots) master
   replicates a355b2ccb1fdf413652a14cec722076af958a079
M: f4b371c4e1d0fddfbe1552e540ddd36a5a00200b 127.0.0.1:
   slots: ( slots) master
   replicates 0bc286b514d36e7195142ff0d55a87542048b5a9
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All  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
127.0.0.1:> cluster info
cluster_state:ok
cluster_slots_assigned:
cluster_slots_ok:
cluster_slots_pfail:
cluster_slots_fail:
cluster_known_nodes:
cluster_size:
cluster_current_epoch:
cluster_stats_messages_sent:
cluster_stats_messages_received:

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 ……

127.0.0.1:> set foo bar
OK
127.0.0.1:> set hello world
OK
127.0.0.1:> get foo
-> Redirected to slot [] located at 127.0.0.1:
"bar"
127.0.0.1:> get hello
-> Redirected to slot [] located at 127.0.0.1:
"world"
127.0.0.1:> get name
-> Redirected to slot [] located at 127.0.0.1:
(nil)
127.0.0.1:>
127.0.0.1:> get name
-> Redirected to slot [] located at 127.0.0.1:
(nil)
127.0.0.1:>