初识redis-cluster

安装redis

 [root@localhost ~]# cd /datas/soft/
 [root@localhost soft]# ll redis-5.0..tar.gz     // 已经下载的最新版
 -rwxrwxrwx  www www  Oct  : redis-5.0..tar.gz
 [root@localhost soft]# tar -xzf redis-5.0..tar.gz
 [root@localhost soft]# cd redis-5.0.
 [root@localhost redis-5.0.]# make
 [root@localhost redis-5.0.]# cd src
 [root@localhost src]# make install PREFIX=/datas/soft/redis5
 [root@localhost src]# mkdir /datas/soft/redis5/etc
 [root@localhost src]# cp ../redis.conf /datas/soft/redis5/etc/
 [root@localhost src]# vim redis.conf
     daemonize yes  // 后台运行
 [root@localhost src]# cd /datas/soft/redis5/bin/
 [root@localhost bin]# ./redis-server ../etc/redis.conf
 :C  Oct  ::42.406 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
 :C  Oct  ::42.406 # Redis version=5.0., bits=, commit=, modified=, pid=, just started
 :C  Oct  ::42.406 # Configuration loaded
 [root@localhost bin]# ps auxf | grep redis
 root        0.0  0.0     pts/    S+   :   :      |   \_ grep redis
 root        0.1  0.7    ?        Ssl  :   : ./redis-server 127.0.0.1:
 [root@localhost bin]# ./redis-cli -p
 127.0.0.1:> set a hahaha6379
 OK
 127.0.0.1:> get a
 "hahaha6379"

部署集群

 [root@localhost bin]# cd ../etc
 [root@localhost etc]# mkdir redis-cluster
 [root@localhost etc]# cd redis-cluster
 [root@localhost redis-cluster]# mkdir
 [root@localhost redis-cluster]# cd
 [root@localhost ]# cp ../../redis.conf ./
 [root@localhost ]# vim redis.conf
     port   // 绑定端口号
     daemonize yes  // 后台运行
     pidfile /datas/soft/redis5/etc/redis-cluster//redis.pid  // 修改pid进程文件名
     logfile /datas/soft/redis5/etc/redis-cluster//redis.log  // 修改日志文件名称
     dir /datas/soft/redis5/etc/redis-cluster//  // 修改数据文件存放地址
     cluster-enabled yes  // 启用集群
     cluster-config-file nodes-.conf  // 配置每个节点的配置文件，同样以端口号为名称
     cluster-node-timeout   // 配置集群节点的超时时间，可改可不改
     appendonly yes  // 启动AOF增量持久化策略
     appendfsync always  // 发生改变就记录日志
 [root@localhost redis-cluster]# ll    // 相同步骤配置其他端口
 total
 drwxr-xr-x  root root  Oct  :
 drwxr-xr-x  root root  Oct  :
 drwxr-xr-x  root root  Oct  :
 drwxr-xr-x  root root  Oct  :
 drwxr-xr-x  root root  Oct  :
 drwxr-xr-x  root root  Oct  :
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf      // 启动
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf
 [root@localhost redis-cluster]# /datas/soft/redis5/bin/redis-server /datas/soft/redis5/etc/redis-cluster//redis.conf
 [root@localhost redis-cluster]# ps auxf | grep redis
 root        0.0  0.0     pts/    S+   :   :      |   \_ grep redis
 root        0.2  1.0   ?        Ssl  :   : ./redis-server 127.0.0.1:
 root        0.9  0.7    ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 root        0.6  0.7    ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 root        0.6  0.7    ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 root        0.6  1.2   ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 root        0.4  1.2   ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 root        0.7  1.2   ?        Ssl  :   : /datas/soft/redis5/bin/redis-server 127.0.0.1: [cluster]
 [root@localhost redis-cluster]# ll /datas/soft/redis5/etc/redis-cluster//
 total
 -rw-r--r--  root root      Oct  : appendonly.aof
 -rw-r--r--  root root    Oct  : dump.rdb
 -rw-r--r--  root root    Oct  : nodes-.conf
 -rwxr-xr-x  root root  Oct  : redis.conf
 -rw-r--r--  root root  Oct  : redis.log
 -rw-r--r--  root root      Oct  : redis.pid

 [root@localhost redis-cluster]# cd ../../bin/
 [root@localhost bin]# yum install -y ruby
 [root@localhost bin]# yum install -y rubygems
 [root@localhost bin]# cp /datas/soft/redis-5.0./src/redis-trib.rb ./
 [root@localhost bin]# ruby 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:
 redis-trib.rb:: odd number list for Hash
         white: ,
               ^
 redis-trib.rb:: syntax error, unexpected ':', expecting '}'
         white: ,
               ^
 redis-trib.rb:: syntax error, unexpected ',', expecting kEND
 [root@localhost bin]# ruby -v
 ruby 1.8. (-- patchlevel ) [x86_64-linux]
 [root@localhost bin]# yum remove -y ruby
 [root@localhost bin]# yum remove -y rubygems
 [root@localhost bin]# cd /datas/soft/
 [root@localhost soft]# ll ruby-2.4..tar.gz     // ruby最新版
 -rwxr-xr-x    root root  Oct  : ruby-2.4..tar.gz
 [root@localhost soft]# tar -xzf ruby-2.4..tar.gz
 [root@localhost soft]# cd ruby-2.4.
 [root@localhost ruby-2.4.]# ./configure
 [root@localhost ruby-2.4.]# make
 [root@localhost ruby-2.4.]# make install
 [root@localhost ruby-2.4.]# ruby -v
 ruby 2.4.5p335 (-- revision ) [x86_64-linux]
 [root@localhost ruby-2.4.]# cd /datas/soft/redis5/bin/
 [root@localhost bin]# ruby 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:
 WARNING: redis-trib.rb is not longer available!
 You should use redis-cli instead.

 All commands and features belonging to redis-trib.rb have been moved
 to redis-cli.
 In order to use them you should call redis-cli with the --cluster
 option followed by the subcommand name, arguments and options.

 Use the following syntax:
 redis-cli --cluster SUBCOMMAND [ARGUMENTS] [OPTIONS]

 Example:
 redis-cli --cluster create 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: --cluster-replicas 

 To get help about all subcommands, type:
 redis-cli --cluster help

 [root@localhost bin]# ./redis-cli --cluster create 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: 127.0.0.1: --cluster-replicas
 >>> Performing hash slots allocation on  nodes...
 Master[] -> Slots  -
 Master[] -> Slots  -
 Master[] -> Slots  -
 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:
 >>> Trying to optimize slaves allocation for anti-affinity
 [WARNING] Some slaves are in the same host as their master
 M: 0ef9bb46603bc2703e2f812316b2d17e4664a285 127.0.0.1:
    slots:[-] ( slots) master
 M: 1cce19c5b8f58666199445ee858b0a699cf523f9 127.0.0.1:
    slots:[-] ( slots) master
 M: 040afde427d4df0738b4705006309fc171403613 127.0.0.1:
    slots:[-] ( slots) master
 S: 7bb7a15f22730493cd7c66954a39e4008788c879 127.0.0.1:
    replicates 1cce19c5b8f58666199445ee858b0a699cf523f9
 S: c08daea6c990cb2732d95ae03c201c94523c0eff 127.0.0.1:
    replicates 040afde427d4df0738b4705006309fc171403613
 S: 7acc8a1f489ec954f069f998792eea8982653e70 127.0.0.1:
    replicates 0ef9bb46603bc2703e2f812316b2d17e4664a285
 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: 0ef9bb46603bc2703e2f812316b2d17e4664a285 127.0.0.1:
    slots:[-] ( slots) master
     additional replica(s)
 S: 7bb7a15f22730493cd7c66954a39e4008788c879 127.0.0.1:
    slots: ( slots) slave
    replicates 1cce19c5b8f58666199445ee858b0a699cf523f9
 M: 1cce19c5b8f58666199445ee858b0a699cf523f9 127.0.0.1:
    slots:[-] ( slots) master
     additional replica(s)
 S: 7acc8a1f489ec954f069f998792eea8982653e70 127.0.0.1:
    slots: ( slots) slave
    replicates 0ef9bb46603bc2703e2f812316b2d17e4664a285
 S: c08daea6c990cb2732d95ae03c201c94523c0eff 127.0.0.1:
    slots: ( slots) slave
    replicates 040afde427d4df0738b4705006309fc171403613
 M: 040afde427d4df0738b4705006309fc171403613 127.0.0.1:
    slots:[-] ( slots) master
     additional replica(s)
 [OK] All nodes agree about slots configuration.
 >>> Check for open slots...
 >>> Check slots coverage...
 [OK] All  slots covered.
 [root@localhost bin]# ./redis-cli -c -p
 127.0.0.1:> set a hahahaha30001
 -> Redirected to slot [] located at 127.0.0.1:
 OK
 127.0.0.1:> get a
 "hahahaha30001"
 127.0.0.1:>
 [root@localhost bin]# ./redis-cli -c -p
 127.0.0.1:> get a
 -> Redirected to slot [] located at 127.0.0.1:
 "hahahaha30001"
 127.0.0.1:>

参考资料

https://www.cnblogs.com/it-cen/p/4295984.html

https://blog.csdn.net/naixiyi/article/details/51346880

https://www.cnblogs.com/PatrickLiu/p/8458788.html

http://www.runoob.com/ruby/ruby-installation-unix.html

https://blog.csdn.net/vtopqx/article/details/50235737

------------------------------- 2019-08-12 -----------------------------------------

单实例数据迁移到Cluster

https://cloud.tencent.com/developer/article/1433055

https://www.18188.org/articles/2016/04/23/1461374145366.html