CentOS 1908 配置 Redis 5.0.7 二（主从复制）

约定不等于承诺〃 2023-06-30 01:50 5阅读 0赞

CentOS 下载：[http://mirrors.aliyun.com/centos/][http_mirrors.aliyun.com_centos]

Redis：[http://download.redis.io/releases/][http_download.redis.io_releases]

[CentOS 1908 配置 Redis 5.0.7 一（单节点）][CentOS 1908 _ Redis 5.0.7]

[CentOS 1908 配置 Redis 5.0.7 三（哨兵模式）][CentOS 1908 _ Redis 5.0.7 1]

[CentOS 1908 配置 Redis 5.0.7 四（集群配置）][CentOS 1908 _ Redis 5.0.7 2]

[CentOS 1908 配置 Redis 5.0.7 五（集群新增 主从节点）][CentOS 1908 _ Redis 5.0.7 _]

--------------------

1.  在 Redis 文件夹中，复制一份 redis.conf：
    
        [root@192 redis-5.0.7]# cp redis.conf redis6380.conf
2.  修改 redis6380.conf
    
        vim redis6380.conf
    
        # 修改端口为 6380
        port 6380
        
        # 增加该 Redis 的主节点为 127.0.0.1 6379
        slaveof 127.0.0.1 6379
3.  先后启动 Redis 6379、6380：
    
        src/redis-server redis.conf
        src/redis-server redis6380.conf
    
    两个 Redis 启动后，显示如下：
    
    1.  6379：  
        可以看到 6379 与 子节点 6380 同步成功：
        
            [root@192 redis-5.0.7]# src/redis-server redis.conf 
            57722:C 13 Jan 2020 21:56:29.198 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
            57722:C 13 Jan 2020 21:56:29.198 # Redis version=5.0.7, bits=64, commit=00000000, modified=0, pid=57722, just started
            57722:C 13 Jan 2020 21:56:29.198 # Configuration loaded
            57722:M 13 Jan 2020 21:56:29.199 * Increased maximum number of open files to 10032 (it was originally set to 1024).
                            _._                                                  
                       _.-``__ ''-._                                             
                  _.-``    `.  `_.  ''-._           Redis 5.0.7 (00000000/0) 64 bit
              .-`` .-```.  ```\/    _.,_ ''-._                                   
             (    '      ,       .-`  | `,    )     Running in standalone mode
             |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
             |    `-._   `._    /     _.-'    |     PID: 57722
              `-._    `-._  `-./  _.-'    _.-'                                   
             |`-._`-._    `-.__.-'    _.-'_.-'|                                  
             |    `-._`-._        _.-'_.-'    |           http://redis.io        
              `-._    `-._`-.__.-'_.-'    _.-'                                   
             |`-._`-._    `-.__.-'    _.-'_.-'|                                  
             |    `-._`-._        _.-'_.-'    |                                  
              `-._    `-._`-.__.-'_.-'    _.-'                                   
                  `-._    `-.__.-'    _.-'                                       
                      `-._        _.-'                                           
                          `-.__.-'                                               
            
            57722:M 13 Jan 2020 21:56:29.200 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
            57722:M 13 Jan 2020 21:56:29.200 # Server initialized
            57722:M 13 Jan 2020 21:56:29.200 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
            57722:M 13 Jan 2020 21:56:29.200 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
            57722:M 13 Jan 2020 21:56:29.201 * DB loaded from disk: 0.000 seconds
            57722:M 13 Jan 2020 21:56:29.201 * Ready to accept connections
            57722:M 13 Jan 2020 21:56:49.506 * Replica 127.0.0.1:6380 asks for synchronization
            57722:M 13 Jan 2020 21:56:49.506 * Full resync requested by replica 127.0.0.1:6380
            57722:M 13 Jan 2020 21:56:49.506 * Starting BGSAVE for SYNC with target: disk
            57722:M 13 Jan 2020 21:56:49.506 * Background saving started by pid 57735
            57735:C 13 Jan 2020 21:56:49.507 * DB saved on disk
            57735:C 13 Jan 2020 21:56:49.508 * RDB: 0 MB of memory used by copy-on-write
            57722:M 13 Jan 2020 21:56:49.539 * Background saving terminated with success
            57722:M 13 Jan 2020 21:56:49.539 * Synchronization with replica 127.0.0.1:6380 succeeded
    2.  6380：  
        可以看到 6380 与 主节点同步成功：
        
            [root@192 redis-5.0.7]# src/redis-server redis6380.conf 
            57731:C 13 Jan 2020 21:56:49.503 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
            57731:C 13 Jan 2020 21:56:49.503 # Redis version=5.0.7, bits=64, commit=00000000, modified=0, pid=57731, just started
            57731:C 13 Jan 2020 21:56:49.503 # Configuration loaded
            57731:S 13 Jan 2020 21:56:49.504 * Increased maximum number of open files to 10032 (it was originally set to 1024).
                            _._                                                  
                       _.-``__ ''-._                                             
                  _.-``    `.  `_.  ''-._           Redis 5.0.7 (00000000/0) 64 bit
              .-`` .-```.  ```\/    _.,_ ''-._                                   
             (    '      ,       .-`  | `,    )     Running in standalone mode
             |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6380
             |    `-._   `._    /     _.-'    |     PID: 57731
              `-._    `-._  `-./  _.-'    _.-'                                   
             |`-._`-._    `-.__.-'    _.-'_.-'|                                  
             |    `-._`-._        _.-'_.-'    |           http://redis.io        
              `-._    `-._`-.__.-'_.-'    _.-'                                   
             |`-._`-._    `-.__.-'    _.-'_.-'|                                  
             |    `-._`-._        _.-'_.-'    |                                  
              `-._    `-._`-.__.-'_.-'    _.-'                                   
                  `-._    `-.__.-'    _.-'                                       
                      `-._        _.-'                                           
                          `-.__.-'                                               
            
            57731:S 13 Jan 2020 21:56:49.505 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
            57731:S 13 Jan 2020 21:56:49.505 # Server initialized
            57731:S 13 Jan 2020 21:56:49.505 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
            57731:S 13 Jan 2020 21:56:49.505 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
            57731:S 13 Jan 2020 21:56:49.505 * DB loaded from disk: 0.000 seconds
            57731:S 13 Jan 2020 21:56:49.505 * Ready to accept connections
            57731:S 13 Jan 2020 21:56:49.505 * Connecting to MASTER 127.0.0.1:6379
            57731:S 13 Jan 2020 21:56:49.505 * MASTER <-> REPLICA sync started
            57731:S 13 Jan 2020 21:56:49.505 * Non blocking connect for SYNC fired the event.
            57731:S 13 Jan 2020 21:56:49.505 * Master replied to PING, replication can continue...
            57731:S 13 Jan 2020 21:56:49.506 * Partial resynchronization not possible (no cached master)
            57731:S 13 Jan 2020 21:56:49.506 * Full resync from master: d6f7735494d10e31c4add5adac1594a6fa22d789:0
            57731:S 13 Jan 2020 21:56:49.539 * MASTER <-> REPLICA sync: receiving 198 bytes from master
            57731:S 13 Jan 2020 21:56:49.539 * MASTER <-> REPLICA sync: Flushing old data
            57731:S 13 Jan 2020 21:56:49.539 * MASTER <-> REPLICA sync: Loading DB in memory
            57731:S 13 Jan 2020 21:56:49.539 * MASTER <-> REPLICA sync: Finished with success
4.  远程连接（注意要打开 Redis 6380 端口），查看同步数据：  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly94dXhpYW93ZWkuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70][]  
     
5.  登录 Redis 主节点，查看节点信息：
    
        [root@192 redis-5.0.7]# src/redis-cli -h 127.0.0.1 -p 6379
        127.0.0.1:6379> INFO replication
        # Replication
        role:master
        connected_slaves:1
        slave0:ip=127.0.0.1,port=6380,state=online,offset=518,lag=1
        master_replid:814a9c1b4f0576a3a62b8ea0868d5fef19118de6
        master_replid2:0000000000000000000000000000000000000000
        master_repl_offset:518
        second_repl_offset:-1
        repl_backlog_active:1
        repl_backlog_size:1048576
        repl_backlog_first_byte_offset:1
        repl_backlog_histlen:518
        127.0.0.1:6379>
6.  登录 Redis 子节点，查看节点信息：
    
        [root@192 redis-5.0.7]# src/redis-cli -h 127.0.0.1 -p 6380
        127.0.0.1:6380> info replication
        # Replication
        role:slave
        master_host:127.0.0.1
        master_port:6379
        master_link_status:up
        master_last_io_seconds_ago:0
        master_sync_in_progress:0
        slave_repl_offset:714
        slave_priority:100
        slave_read_only:1
        connected_slaves:0
        master_replid:814a9c1b4f0576a3a62b8ea0868d5fef19118de6
        master_replid2:0000000000000000000000000000000000000000
        master_repl_offset:714
        second_repl_offset:-1
        repl_backlog_active:1
        repl_backlog_size:1048576
        repl_backlog_first_byte_offset:1
        repl_backlog_histlen:714
        127.0.0.1:6380>
7.  远程连接需要开通端口 6380，参见：[CentOS 1908 配置 Redis 5.0.7 一（单节点）][CentOS 1908 _ Redis 5.0.7]

[http_mirrors.aliyun.com_centos]: http://mirrors.aliyun.com/centos/
[http_download.redis.io_releases]: http://download.redis.io/releases/
[CentOS 1908 _ Redis 5.0.7]: https://xuxiaowei.blog.csdn.net/article/details/103964264
[CentOS 1908 _ Redis 5.0.7 1]: https://xuxiaowei.blog.csdn.net/article/details/104092822
[CentOS 1908 _ Redis 5.0.7 2]: https://xuxiaowei.blog.csdn.net/article/details/104239333
[CentOS 1908 _ Redis 5.0.7 _]: https://xuxiaowei.blog.csdn.net/article/details/104402130
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly94dXhpYW93ZWkuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200113220532479.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly94dXhpYW93ZWkuYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70