redis 集群搭建(非哨兵)-白红宇

redis 集群搭建(非哨兵)

阅读量：6225 次

发布时间：2019-06-21

本文共 12137 字，大约阅读时间需要 40 分钟。

环境

#environmentOS: CentOS 7.2 64#ip192.168.21.137~139

redis `节点`

目录和文件准备

#三台各自执行mkdir /rediswget -P /redis http://download.redis.io/releases/redis-4.0.1.tar.gz#安装cd redis-4.0.1make && make install

节点

#通过配置文件给每台服务器配置三个redis节点mkdir -p /redis_cluster/6001 /redis_cluster/6002 /redis_cluster/6003cp /redis/redis-4.0.1/redis.conf  /redis_cluster/6001/cp /redis/redis-4.0.1/redis.conf  /redis_cluster/6002/cp /redis/redis-4.0.1/redis.conf  /redis_cluster/6003/#配置#redis后台运行daemonize    yes                         #pidfile文件 6001~6003pidfile  /var/run/redis_6000.pid         #6001~6003port  7000                               #开启集群cluster-enabled  yes                     #配置文件首次启动自动生成cluster-config-file  nodes_6001.conf     #请求超时cluster-node-timeout  5000               #aof日志appendonly  no  #绑定地址，需要别的机器能ping通的地址bind 192.168.21.137

启动

redis-server  /redis_cluster/6001/redis.confredis-server  /redis_cluster/6002/redis.confredis-server  /redis_cluster/6003/redis.conf

检查是否启动成功及信息

[root@localhost /]# ps -ef | grep redisroot      16700      1  0 23:08 ?        00:00:00 redis-server 127.0.0.1:6001root      16705      1  0 23:08 ?        00:00:00 redis-server 127.0.0.1:6002root      16710      1  0 23:08 ?        00:00:00 redis-server 127.0.0.1:6003root      16715  12065  0 23:08 pts/1    00:00:00 grep --color=auto redis[root@localhost /]# netstat -tnlp | grep redistcp        0      0 127.0.0.1:6001          0.0.0.0:*               LISTEN      16700/redis-server  tcp        0      0 127.0.0.1:6002          0.0.0.0:*               LISTEN      16705/redis-server  tcp        0      0 127.0.0.1:6003          0.0.0.0:*               LISTEN      16710/redis-server  [root@localhost /]#

至此，redis 节点准备完成。

搭建`集群`

redis 官方提供了一个 redis-trib.rb （src目录下）工具用于搭建集群。很明显是 ruby 写的，所以需要 ruby 环境。

安装 `ruby`

yum -y install ruby ruby-devel rubygems rpm-build

用 gem 安装 redis 接口

[root@localhost /]# gem install redisFetching: redis-3.3.3.gem (100%)Successfully installed redis-3.3.3Parsing documentation for redis-3.3.3Installing ri documentation for redis-3.3.31 gem installed

确保开放端口，可参考我的另一个微博

运行 redis-trib.rb 查看集群创建帮助

[root@localhost /]# /redis/redis-4.0.1/src/redis-trib.rb Usage: redis-trib  
     
     
        create          host1:port1 ... hostN:portN                  --replicas 
      
         check           host:port  info            host:port  fix             host:port                  --timeout 
       
          reshard         host:port                  --from 
        
                           --to 
         
           --slots 
          
            --yes --timeout 
           
             --pipeline 
            
              rebalance host:port --weight 
             
               --auto-weights --use-empty-masters --timeout 
              
                --simulate --pipeline 
               
                 --threshold 
                
                  add-node new_host:new_port existing_host:existing_port --slave --master-id 
                 
                   del-node host:port node_id set-timeout host:port milliseconds call host:port command arg arg .. arg import host:port --from 
                  
                    --copy --replace help (show this help)For check, fix, reshard, del-node, set-timeout you can specify the host and port of any working node in the cluster.

创建集群

#其中 --replicas  2 意思为为每个 master 分配 2 各 slave[root@localhost ~]# /redis/redis-4.0.1/src/redis-trib.rb  create  --replicas  2  192.168.21.137:6001 192.168.21.137:6002 192.168.21.137:6003 192.168.21.138:6001 192.168.21.138:6002 192.168.21.138:6003 192.168.21.139:6001 192.168.21.139:6002 192.168.21.139:6003>>> Creating cluster>>> Performing hash slots allocation on 9 nodes...Using 3 masters:192.168.21.137:6001192.168.21.138:6001192.168.21.139:6001Adding replica 192.168.21.138:6002 to 192.168.21.137:6001Adding replica 192.168.21.139:6002 to 192.168.21.137:6001Adding replica 192.168.21.137:6002 to 192.168.21.138:6001Adding replica 192.168.21.137:6003 to 192.168.21.138:6001Adding replica 192.168.21.138:6003 to 192.168.21.139:6001Adding replica 192.168.21.139:6003 to 192.168.21.139:6001M: 40217a88d10bb85bdd0d082df24f036435b82513 192.168.21.137:6001   slots:0-5460 (5461 slots) masterS: bc847ed99feac417a066baaa48fa0748ac409c67 192.168.21.137:6002   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412S: 840ab2d448387c801b67a958543090ce1d8ee1ba 192.168.21.137:6003   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412M: 4a391d4987ee5f0cf342108890cf8236d56ea412 192.168.21.138:6001   slots:5461-10922 (5462 slots) masterS: b977d15fbeaa3e88b830bf5b6caa22a27a2dce8f 192.168.21.138:6002   replicates 40217a88d10bb85bdd0d082df24f036435b82513S: bd0fdf29c06fb27b2aa9eca478ec20ab9daf81da 192.168.21.138:6003   replicates c32b18ec7a947f01bde73a3c93abc31d60b060eeM: c32b18ec7a947f01bde73a3c93abc31d60b060ee 192.168.21.139:6001   slots:10923-16383 (5461 slots) masterS: e323d818a7be4149053669552230f4a98332734c 192.168.21.139:6002   replicates 40217a88d10bb85bdd0d082df24f036435b82513S: 3bcd9cf11589f418fe5cbc1895ac5a23b0b6714e 192.168.21.139:6003   replicates c32b18ec7a947f01bde73a3c93abc31d60b060eeCan 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 clusterWaiting for the cluster to join....>>> Performing Cluster Check (using node 192.168.21.137:6001)M: 40217a88d10bb85bdd0d082df24f036435b82513 192.168.21.137:6001   slots:0-5460 (5461 slots) master   2 additional replica(s)S: bc847ed99feac417a066baaa48fa0748ac409c67 192.168.21.137:6002   slots: (0 slots) slave   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412S: 3bcd9cf11589f418fe5cbc1895ac5a23b0b6714e 192.168.21.139:6003   slots: (0 slots) slave   replicates c32b18ec7a947f01bde73a3c93abc31d60b060eeS: bd0fdf29c06fb27b2aa9eca478ec20ab9daf81da 192.168.21.138:6003   slots: (0 slots) slave   replicates c32b18ec7a947f01bde73a3c93abc31d60b060eeS: 840ab2d448387c801b67a958543090ce1d8ee1ba 192.168.21.137:6003   slots: (0 slots) slave   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412M: c32b18ec7a947f01bde73a3c93abc31d60b060ee 192.168.21.139:6001   slots:10923-16383 (5461 slots) master   2 additional replica(s)S: b977d15fbeaa3e88b830bf5b6caa22a27a2dce8f 192.168.21.138:6002   slots: (0 slots) slave   replicates 40217a88d10bb85bdd0d082df24f036435b82513M: 4a391d4987ee5f0cf342108890cf8236d56ea412 192.168.21.138:6001   slots:5461-10922 (5462 slots) master   2 additional replica(s)S: e323d818a7be4149053669552230f4a98332734c 192.168.21.139:6002   slots: (0 slots) slave   replicates 40217a88d10bb85bdd0d082df24f036435b82513[OK] All nodes agree about slots configuration.>>> Check for open slots...>>> Check slots coverage...[OK] All 16384 slots covered.

测试集群

#在 192.168.21.138:6001 机器上设置一个键值对 testKey--testValue ,因为绑定了 IP ,所以 h 参数不能省略[root@localhost ~]# redis-cli -h 192.168.21.138 -c -p 6001192.168.21.138:6001> set testKey testValue-> Redirected to slot [5203] located at 192.168.21.137:6001OK192.168.21.137:6001> get testKey"testValue"192.168.21.137:6001> ...#在 192.168.21.137:6003 上获取 testKey 的值,发现自动定向到 192.168.21.137:6001,说明成功[root@localhost ~]# redis-cli -h 192.168.21.137 -c -p 6003192.168.21.137:6003> get testKey-> Redirected to slot [5203] located at 192.168.21.137:6001"testValue"192.168.21.137:6001> ...#在 192.168.21.139:6002 上获取 testKey 的值,发现自动定向到 192.168.21.137:6001,说明成功[root@localhost ~]# redis-cli -h 192.168.21.139 -c -p 6002192.168.21.139:6002> get testKey-> Redirected to slot [5203] located at 192.168.21.137:6001"testValue"192.168.21.137:6001>

至此，Redis 集群搭建完成。

集群操作

检查状态

[root@localhost ~]# /redis/redis-4.0.1/src/redis-trib.rb check 192.168.21.139:6002>>> Performing Cluster Check (using node 192.168.21.139:6002)S: e323d818a7be4149053669552230f4a98332734c 192.168.21.139:6002   slots: (0 slots) slave   replicates 40217a88d10bb85bdd0d082df24f036435b82513S: 840ab2d448387c801b67a958543090ce1d8ee1ba 192.168.21.137:6003   slots: (0 slots) slave   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412S: bd0fdf29c06fb27b2aa9eca478ec20ab9daf81da 192.168.21.138:6003   slots: (0 slots) slave   replicates c32b18ec7a947f01bde73a3c93abc31d60b060eeM: c32b18ec7a947f01bde73a3c93abc31d60b060ee 192.168.21.139:6001   slots:10923-16383 (5461 slots) master   2 additional replica(s)S: b977d15fbeaa3e88b830bf5b6caa22a27a2dce8f 192.168.21.138:6002   slots: (0 slots) slave   replicates 40217a88d10bb85bdd0d082df24f036435b82513S: bc847ed99feac417a066baaa48fa0748ac409c67 192.168.21.137:6002   slots: (0 slots) slave   replicates 4a391d4987ee5f0cf342108890cf8236d56ea412M: 4a391d4987ee5f0cf342108890cf8236d56ea412 192.168.21.138:6001   slots:5461-10922 (5462 slots) master   2 additional replica(s)M: 40217a88d10bb85bdd0d082df24f036435b82513 192.168.21.137:6001   slots:0-5460 (5461 slots) master   2 additional replica(s)S: 3bcd9cf11589f418fe5cbc1895ac5a23b0b6714e 192.168.21.139:6003   slots: (0 slots) slave   replicates c32b18ec7a947f01bde73a3c93abc31d60b060ee[OK] All nodes agree about slots configuration.>>> Check for open slots...>>> Check slots coverage...[OK] All 16384 slots covered.

查看所有节点信息

[root@localhost ~]# redis-cli -h 192.168.21.138 -c -p 6001192.168.21.138:6001> cluster nodese323d818a7be4149053669552230f4a98332734c 192.168.21.139:6002@16002 slave 40217a88d10bb85bdd0d082df24f036435b82513 0 1503628318000 8 connectedbc847ed99feac417a066baaa48fa0748ac409c67 192.168.21.137:6002@16002 slave 4a391d4987ee5f0cf342108890cf8236d56ea412 0 1503628318620 4 connectedc32b18ec7a947f01bde73a3c93abc31d60b060ee 192.168.21.139:6001@16001 master - 0 1503628317000 7 connected 10923-16383bd0fdf29c06fb27b2aa9eca478ec20ab9daf81da 192.168.21.138:6003@16003 slave c32b18ec7a947f01bde73a3c93abc31d60b060ee 0 1503628318000 7 connected40217a88d10bb85bdd0d082df24f036435b82513 192.168.21.137:6001@16001 master - 0 1503628318117 1 connected 0-54604a391d4987ee5f0cf342108890cf8236d56ea412 192.168.21.138:6001@16001 myself,master - 0 1503628317000 4 connected 5461-10922840ab2d448387c801b67a958543090ce1d8ee1ba 192.168.21.137:6003@16003 slave 4a391d4987ee5f0cf342108890cf8236d56ea412 0 1503628318519 4 connected3bcd9cf11589f418fe5cbc1895ac5a23b0b6714e 192.168.21.139:6003@16003 slave c32b18ec7a947f01bde73a3c93abc31d60b060ee 0 1503628317111 9 connectedb977d15fbeaa3e88b830bf5b6caa22a27a2dce8f 192.168.21.138:6002@16002 slave 40217a88d10bb85bdd0d082df24f036435b82513 0 1503628317111 5 connected192.168.21.138:6001> cluster infocluster_state:okcluster_slots_assigned:16384cluster_slots_ok:16384cluster_slots_pfail:0cluster_slots_fail:0cluster_known_nodes:9cluster_size:3cluster_current_epoch:9cluster_my_epoch:4cluster_stats_messages_ping_sent:4391cluster_stats_messages_pong_sent:4314cluster_stats_messages_meet_sent:2cluster_stats_messages_sent:8707cluster_stats_messages_ping_received:4308cluster_stats_messages_pong_received:4393cluster_stats_messages_meet_received:6cluster_stats_messages_received:8707192.168.21.138:6001>

节点命令

#将 ip 和 port 所在的节点添加到集群当中cluster meet 
     
     
       #从集群中移除 node_id 指定的节点。cluster forget 
      
        #将当前结点设置为 node_id 的 slave（从节点）cluster replicate 
       
        #保存节点配置文件cluster saveconfig

槽命令

#将一个或多个槽（ slot）指派（ assign）给当前节点。cluster addslots 
    
      [slot ...] #移除一个或多个槽对当前节点的指派。cluster delslots 
     
       [slot ...] #移除指派给当前节点的所有槽，让当前节点变成一个没有指派任何槽的节点。cluster flushslots #将槽 slot 指派给 node_id 指定的节点，如果槽已经指派给另一个节点，那么先让另一个节点删除该槽>，然后再进行指派。cluster setslot 
      
        node 
       
         #将本节点的槽 slot 迁移到 node_id 指定的节点中。cluster setslot 
        
          migrating 
         
           #从 node_id 指定的节点中导入槽 slot 到本节点。cluster setslot 
          
            importing 
           
             #取消对槽 slot 的导入（ import）或者迁移（ migrate）。cluster setslot 
            
              stable

键

#计算键 key 应该被放置在哪个槽上。cluster keyslot 
    
      #返回槽 slot 目前包含的键值对数量。cluster countkeysinslot 
     
       #返回 count 个 slot 槽中的键 。cluster getkeysinslot

脚本

启动节点

#!/bin/bashfor i in 1 2 3do        /redis/redis-4.0.1/src/redis-server /redis_cluster/600$i/redis.conf;done

启动集群

#!/bin/bash/redis/redis-4.0.1/src/redis-trib.rb  create  --replicas  2  192.168.21.137:6001 192.168.21.137:6002 192.168.21.137:6003 192.168.21.138:6001 192.168.21.138:6002 192.168.21.138:6003 192.168.21.139:6001 192.168.21.139:6002 192.168.21.139:6003

关闭

#!/bin/bashfor i in 137 138 139do        for j in 1 2 3        do                /redis/redis-4.0.1/src/redis-cli -c -h 192.168.21.$i -p 600$j shutdown;        donedone

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