（进阶篇）Redis6.2.0 集群主从复制_搭建_01

太过爱你忘了你带给我的痛 2022-10-12 05:42 129阅读 0赞

### 文章目录 ###

*   *   *   *   *   *  1. 部署划分
                     *  2. 单机安装Redis
                     *  3. 创建配置/数据/日志目录
                     *  4. 修改配置文件
                     *  5. redis启动
                     *  6. 登录查看信息
                     *  7. 读写分离

###### 1. 部署划分 ######

<table> 
 <thead> 
  <tr> 
   <th>ip</th> 
   <th>角色</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>192.168.92.100</td> 
   <td>Master</td> 
  </tr> 
  <tr> 
   <td>192.168.92.101</td> 
   <td>Slave</td> 
  </tr> 
  <tr> 
   <td>192.168.92.102</td> 
   <td>Slave</td> 
  </tr> 
 </tbody> 
</table>

###### 2. 单机安装Redis ######

首先在在3台服务器上分别安装Redis单机环境  
[(单机)Linux环境安装最新版Redis-6.2.0][Linux_Redis-6.2.0]

###### 3. 创建配置/数据/日志目录 ######

> 声明:下面流程3个节点依次操作

# 创建配置目录
    mkdir /usr/local/redis/conf
    
    # 创建数据目录
    mkdir /usr/local/redis/data
    
    # 创建日志目录
    mkdir /usr/local/redis/log

###### 4. 修改配置文件 ######

3个节点依次创建一个redis.conf配置文件在conf目录下面

vi /usr/local/redis/conf/redis.conf

主节点配置

# 放行访问IP的限制 多个用空格隔开 
    # 0.0.0.0 代表无限制
    bind 0.0.0.0
    
    # 后台启动开启
    daemonize yes
    
    # 日志存储目录以及日志文件名
    logfile "/usr/local/redis/log/redis.log"
    
    # rdb数据文件名
    dbfilename dump.rdb
    
    # aof模式开启
    appendonly no
    
    # aof数据文件名
    appendfilename "appendonly.aof"
    
    #rdb数据文件和aof数据文件存储目录
    dir /usr/local/redis/data
    
    # 设置密码
    requirepass 123456
    
    # 从节点访问主节点的密码(必须和requirepass 一致)
    masterauth 123456
    
    #从节点只读模式
    replica-read-only yes

2个Slave节点配置

vi /usr/local/redis/conf/redis.conf

主节点配置

###### 5. redis启动 ######

主节点

[root@bigdata01 bin]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
    [root@bigdata01 bin]# ps -ef |grep redis
    root      11960      1  0 17:15 ?        00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
    root      11977   7237  0 17:16 pts/0    00:00:00 grep --color=auto redis

01节点

[root@bigdata02 ~]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
    [root@bigdata02 ~]# ps -ef |grep redis
    root      23879      1  0 17:16 ?        00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
    root      23885  23847  0 17:16 pts/0    00:00:00 grep --color=auto redis

02节点

[root@bigdata03 bin]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
    [root@bigdata03 bin]# ps -ef |grep redis
    root      23814      1  0 17:16 ?        00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
    root      23820  19247  0 17:16 pts/0    00:00:00 grep --color=auto redis

###### 6. 登录查看信息 ######

主节点信息

[root@bigdata01 bin]# /usr/local/redis/bin/redis-cli -a 123456
    Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
    127.0.0.1:6379> info replication
    # Replication
    role:master
    connected_slaves:2
    slave0:ip=192.168.92.101,port=6379,state=online,offset=266,lag=1
    slave1:ip=192.168.92.102,port=6379,state=online,offset=266,lag=1
    master_failover_state:no-failover
    master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
    master_replid2:0000000000000000000000000000000000000000
    master_repl_offset:266
    second_repl_offset:-1
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:1
    repl_backlog_histlen:266
    127.0.0.1:6379>

01节点信息

[root@bigdata02 ~]# /usr/local/redis/bin/redis-cli -a 123456
    Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
    127.0.0.1:6379> info replication
    # Replication
    role:slave
    master_host:192.168.92.100
    master_port:6379
    master_link_status:up
    master_last_io_seconds_ago:4
    master_sync_in_progress:0
    slave_repl_offset:392
    slave_priority:100
    slave_read_only:1
    connected_slaves:0
    master_failover_state:no-failover
    master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
    master_replid2:0000000000000000000000000000000000000000
    master_repl_offset:392
    second_repl_offset:-1
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:1
    repl_backlog_histlen:392
    127.0.0.1:6379>

02节点信息

[root@bigdata03 bin]# /usr/local/redis/bin/redis-cli -a 123456
    Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
    127.0.0.1:6379> info replication
    # Replication
    role:slave
    master_host:192.168.92.100
    master_port:6379
    master_link_status:up
    master_last_io_seconds_ago:6
    master_sync_in_progress:0
    slave_repl_offset:448
    slave_priority:100
    slave_read_only:1
    connected_slaves:0
    master_failover_state:no-failover
    master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
    master_replid2:0000000000000000000000000000000000000000
    master_repl_offset:448
    second_repl_offset:-1
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:15
    repl_backlog_histlen:434
    127.0.0.1:6379>

###### 7. 读写分离 ######

master节点 能读能写验证

127.0.0.1:6379> set name zhangsan
    OK
    127.0.0.1:6379> get name
    "zhangsan"
    127.0.0.1:6379>

01 slave节点 能读不能写验证

127.0.0.1:6379> get name
    "zhangsan"
    127.0.0.1:6379> set lisi
    (error) ERR wrong number of arguments for 'set' command
    127.0.0.1:6379>

01 slave节点 能读不能写验证

27.0.0.1:6379> get name
    "zhangsan"
    127.0.0.1:6379> set name lisi
    (error) READONLY You can't write against a read only replica.
    127.0.0.1:6379>

[Linux_Redis-6.2.0]: https://gblfy.blog.csdn.net/article/details/114371657