redis配置主从同步

骑猪看日落 2022-04-24 08:16 263阅读 0赞

### 文章目录 ###

*   *  一、概述
     *  二、测试环境准备
     *   *  步骤一：查看主节点信息
         *  步骤二：查看从节点01信息
         *  步骤三：查看从节点02信息
     *  三、节点基础配置
     *   *  1.master节点基础配置
         *   *  步骤一：下载redis安装包
             *  步骤二：解压redis包
             *  步骤三：编译redis（只需要执行make））
             *  步骤四：创建redis目录，并且redis基本文件拷进去
             *  步骤五：修改redis配置文件
             *  步骤六：启动redis
             *  步骤七：redis客户端连接测试
         *  2.配置从节点（从节点与主节点的基础配置步骤一样）
         *   *  步骤一：按照主节点的配置步骤配置（配置文件的不同之处如下）
             *  步骤二：启动salve01
             *  步骤三：启动从节点02
     *  四、主从配置
     *   *  1.主节点master信息
         *   *  步骤一：修改配置文件信息，修改前。
             *  步骤二：重启redis
         *  2.配置从节点（以salve01为例）
         *   *  步骤一：修改slave信息配置文件信息
             *  步骤二：重启redis
     *  五、验证主从复制
     *   *  1.主节点信息查看
         *   *  步骤一：查看主节点主从信息
             *  步骤二：查看主节点的key
         *  2.从节点01信息查看
         *   *  步骤一：查看从节点主从信息
             *  步骤二：查看从节点01的key
         *  3.从节点02信息查看
         *   *  步骤一：查看从节点主从信息
             *  步骤二：查看从节点01的key
         *  4.主节点添加字符串
         *   *  步骤一：添加redis liang
             *  步骤二：从节点01查看
             *  步骤三：从节点02查看
         *  六、redis管理脚本

## 一、概述 ##

概述：为了分担读写压力，Redis支持主从复制，Redis的主从结构可以采用一主多从或者级联结构，Redis主从复制可以根据是否是全量分为全量同步和增量同步

## 二、测试环境准备 ##

### 步骤一：查看主节点信息 ###

<table> 
 <thead> 
  <tr> 
   <th>系统</th> 
   <th>IP</th> 
   <th>主机名</th> 
   <th>redis版本</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>centos-7.2</td> 
   <td>10.0.0.67</td> 
   <td>redis-master</td> 
   <td>redis-4.0.9.tar.gz</td> 
  </tr> 
  <tr> 
   <td>centos-7.2</td> 
   <td>10.0.0.68</td> 
   <td>redis-slave01</td> 
   <td>redis-4.0.9.tar.gz</td> 
  </tr> 
  <tr> 
   <td>centos-7.2</td> 
   <td>10.0.0.69</td> 
   <td>redis-slave02</td> 
   <td>redis-4.0.9.tar.gz</td> 
  </tr> 
 </tbody> 
</table>

> \[root@redis ~\]\# ifconfig eno16777736|grep -w inet  
> inet 10.0.0.67 netmask 255.255.255.0 broadcast 10.0.0.255

> \[root@redis ~\]\# cat /etc/redhat-release  
> CentOS Linux release 7.2.1511 (Core)

> \[root@redis ~\]\# uname -r  
> 3.10.0-327.el7.x86\_64

### 步骤二：查看从节点01信息 ###

> \[root@redis-slave01 ~\]\# ifconfig eno16777736|grep -w inet  
> inet 10.0.0.68 netmask 255.255.255.0 broadcast 10.0.0.255

> \[root@redis-slave01 ~\]\# cat /etc/redhat-release  
> CentOS Linux release 7.2.1511 (Core)

> \[root@redis-slave01 ~\]\# uname -r  
> 3.10.0-327.el7.x86\_64

### 步骤三：查看从节点02信息 ###

> \[root@redis-slave02 ~\]\# ifconfig eno16777736|grep -w inet  
> inet 10.0.0.69 netmask 255.255.255.0 broadcast 10.0.0.255

> \[root@redis-slave02 ~\]\# cat /etc/redhat-release  
> CentOS Linux release 7.2.1511 (Core)

> \[root@redis-slave02 ~\]\# uname -r  
> 3.10.0-327.el7.x86\_64

## 三、节点基础配置 ##

### 1.master节点基础配置 ###

#### 步骤一：下载redis安装包 ####

> \[root@redis ~\]\# wget [http://download.redis.io/releases/redis-4.0.9.tar.gz][http_download.redis.io_releases_redis-4.0.9.tar.gz]  
> \[root@redis ~\]\# ll redis-4.0.9.tar.gz  
> \-rw-r–r--. 1 root root 1737022 Mar 26 2018 redis-4.0.9.tar.gz

#### 步骤二：解压redis包 ####

> \[root@redis ~\]\# tar zxf redis-4.0.9.tar.gz  
> \[root@redis ~\]\# cd redis-4.0.9  
> \[root@redis redis-4.0.9\]\# ls  
> 00-RELEASENOTES CONTRIBUTING deps Makefile [README.md][] runtest runtest-sentinel src utils  
> BUGS COPYING INSTALL MANIFESTO redis.conf runtest-cluster sentinel.conf tests

#### 步骤三：编译redis（只需要执行make）） ####

> \[root@redis redis-4.0.9\]\# make  
> 编译出错：zmalloc.h:50:31: fatal error: jemalloc/jemalloc.h: No such file or directory  
> 解决方法：make MALLOC=libc  
> \[root@redis redis-4.0.9\]\#make MALLOC=libc

#### 步骤四：创建redis目录，并且redis基本文件拷进去 ####

> \[root@redis redis-4.0.9\]\# mkdir /usr/local/redis -p  
> \[root@redis redis-4.0.9\]\# cp src/redis-server /usr/local/redis/  
> \[root@redis redis-4.0.9\]\# cp src/redis-cli /usr/local/redis/  
> \[root@redis redis-4.0.9\]\# cp redis.conf /usr/local/redis/  
> \[root@redis redis-4.0.9\]\# mkdir /application  
> \[root@redis redis-4.0.9\]\# ln -s /usr/local/redis/ /application/

#### 步骤五：修改redis配置文件 ####

> \[root@redis redis-4.0.9\]\# cd /application/redis/  
> \[root@redis redis\]\# cp redis.conf redis.conf.backup  
> 修改前  
> \[root@redis redis\]\# egrep “^bind|^protected-mode|^\\daemonize|\# requirepass” redis.conf  
> bind 127.0.0.1  
> protected-mode yes  
> daemonize no  
> requirepass 000000  
> 修改后  
> \[root@redis redis\]\# egrep “^bind|^protected-mode|^daemonize|^requirepass” redis.conf  
> bind 10.0.0.67  
> protected-mode no  
> daemonize yes  
> requirepass 000000

#### 步骤六：启动redis ####

> \[root@redis redis\]\# ./redis-server redis.conf  
> 13064:C 04 Apr 20:32:15.767 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
> 13064:C 04 Apr 20:32:15.767 \# Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=13064, just started  
> 13064:C 04 Apr 20:32:15.767 \# Configuration loaded

> \[root@redis redis\]\# netstat -lntup|grep 6379  
> tcp 0 0 10.0.0.67:6379 0.0.0.0:\* LISTEN 13065/./redis-serve

#### 步骤七：redis客户端连接测试 ####

> \[root@redis redis\]\# redis -h 10.0.0.67 -p 6379 -a 000000  
> 10.0.0.67:6379> exit

### 2.配置从节点（从节点与主节点的基础配置步骤一样） ###

#### 步骤一：按照主节点的配置步骤配置（配置文件的不同之处如下） ####

> \[root@redis-slave01 redis\]\# grep “^bind” redis.conf  
> bind 10.0.0.68  
> \[root@redis-slave02 redis\]\# grep “^bind” redis.conf  
> bind 10.0.0.69

#### 步骤二：启动salve01 ####

> \[root@redis-slave01 redis\]\# ./redis-server ./redis.conf  
> 3106:C 20 Apr 12:12:06.594 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
> 3106:C 20 Apr 12:12:06.595 \# Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=3106, just started  
> 3106:C 20 Apr 12:12:06.595 \# Configuration loaded  
> \[root@redis-slave01 redis\]\# netstat -lntup|grep 6379  
> tcp 0 0 10.0.0.68:6379 0.0.0.0:\* LISTEN 3107/./redis-server

#### 步骤三：启动从节点02 ####

> \[root@redis-slave02 redis\]\# ./redis-server ./redis.conf  
> 3166:C 20 Apr 12:12:39.877 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
> 3166:C 20 Apr 12:12:39.877 \# Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=3166, just started  
> 3166:C 20 Apr 12:12:39.877 \# Configuration loaded  
> \[root@redis-slave02 redis\]\# netstat -lntup|grep 6379  
> tcp 0 0 10.0.0.69:6379 0.0.0.0:\* LISTEN 3167/./redis-server

## 四、主从配置 ##

### 1.主节点master信息 ###

#### 步骤一：修改配置文件信息，修改前。 ####

> vi redis.conf  
> 450 \# min-slaves-to-write 3  
> 451 \# min-slaves-max-lag 10  
> 修改后  
> 450 min-slaves-to-write 2 \#\#\#有几个salve，如果salve的数量小于的话会报错“(error) NOREPLICAS Not enough good slaves to write.  
> ”  
> 451 min-slaves-max-lag 10 \#\#\#slave与master的超时时间

#### 步骤二：重启redis ####

> \[root@redis redis\]\# ./redis-cli -p 6379 -h 10.0.0.67 -a 000000 shutdown

> \[root@redis redis\]\# ./redis-server ./redis.conf  
> 2682:C 20 Apr 12:25:05.983 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
> 2682:C 20 Apr 12:25:05.983 \# Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=2682, just started  
> 2682:C 20 Apr 12:25:05.983 \# Configuration loaded

### 2.配置从节点（以salve01为例） ###

#### 步骤一：修改slave信息配置文件信息 ####

> 修改前  
> \[root@redis-slave01 redis\]\# vi redis.conf  
> 281 \# slaveof  
> 288 \# masterauth  
> 修改后  
> 281 slaveof 10.0.0.67 6379  
> 288 masterauth 000000

#### 步骤二：重启redis ####

> \[root@redis-slave01 redis\]\# ./redis-cli -h 10.0.0.68 -a 000000 shutdown

> \[root@redis-slave01 redis\]\# ./redis-server ./redis.conf  
> 3149:C 20 Apr 12:28:11.882 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
> 3149:C 20 Apr 12:28:11.882 \# Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=3149, just started  
> 3149:C 20 Apr 12:28:11.882 \# Configuration loaded

## 五、验证主从复制 ##

### 1.主节点信息查看 ###

#### 步骤一：查看主节点主从信息 ####

> \[root@redis redis\]\# ./redis-cli -h 10.0.0.67 -a 000000  
> 10.0.0.67:6379> info replication  
> \# Replication  
> role:master  
> connected\_slaves:2  
> min\_slaves\_good\_slaves:2  
> slave0:ip=10.0.0.68,port=6379,state=online,offset=240,lag=0  
> slave1:ip=10.0.0.69,port=6379,state=online,offset=240,lag=1  
> master\_replid:6811d95c1e61ece1eaf8fdeb6edae1c1ce76a0f3  
> master\_replid2:0000000000000000000000000000000000000000  
> master\_repl\_offset:240  
> second\_repl\_offset:-1  
> repl\_backlog\_active:1  
> repl\_backlog\_size:1048576  
> repl\_backlog\_first\_byte\_offset:1  
> repl\_backlog\_histlen:240

#### 步骤二：查看主节点的key ####

> 10.0.0.67:6379> KEYS \*  
> (empty list or set)

### 2.从节点01信息查看 ###

#### 步骤一：查看从节点主从信息 ####

> \[root@redis-slave01 redis\]\# ./redis-cli -h 10.0.0.68 -a 000000  
> 10.0.0.68:6379> info replication  
> \# Replication  
> role:slave  
> master\_host:10.0.0.67  
> master\_port:6379  
> master\_link\_status:up  
> master\_last\_io\_seconds\_ago:6  
> master\_sync\_in\_progress:0  
> slave\_repl\_offset:394  
> slave\_priority:100  
> slave\_read\_only:1  
> connected\_slaves:0  
> master\_replid:6811d95c1e61ece1eaf8fdeb6edae1c1ce76a0f3  
> master\_replid2:0000000000000000000000000000000000000000  
> master\_repl\_offset:394  
> second\_repl\_offset:-1  
> repl\_backlog\_active:1  
> repl\_backlog\_size:1048576  
> repl\_backlog\_first\_byte\_offset:1  
> repl\_backlog\_histlen:394

#### 步骤二：查看从节点01的key ####

> 10.0.0.68:6379> KEYS \*  
> (empty list or set)

### 3.从节点02信息查看 ###

#### 步骤一：查看从节点主从信息 ####

> \[root@redis-slave02 redis\]\# ./redis-cli -h 10.0.0.69 -a 000000  
> 10.0.0.69:6379> info replication  
> \# Replication  
> role:slave  
> master\_host:10.0.0.67  
> master\_port:6379  
> master\_link\_status:up  
> master\_last\_io\_seconds\_ago:5  
> master\_sync\_in\_progress:0  
> slave\_repl\_offset:436  
> slave\_priority:100  
> slave\_read\_only:1  
> connected\_slaves:0  
> master\_replid:6811d95c1e61ece1eaf8fdeb6edae1c1ce76a0f3  
> master\_replid2:0000000000000000000000000000000000000000  
> master\_repl\_offset:436  
> second\_repl\_offset:-1  
> repl\_backlog\_active:1  
> repl\_backlog\_size:1048576  
> repl\_backlog\_first\_byte\_offset:1  
> repl\_backlog\_histlen:436

#### 步骤二：查看从节点01的key ####

> 10.0.0.69:6379> KEYS \*  
> (empty list or set)

### 4.主节点添加字符串 ###

#### 步骤一：添加redis liang ####

> 10.0.0.67:6379> set redis liang  
> OK

#### 步骤二：从节点01查看 ####

> 10.0.0.68:6379> KEYS \*  
> 1) “redis”  
> 10.0.0.68:6379> get redis  
> “liang”

#### 步骤三：从节点02查看 ####

> 10.0.0.69:6379> KEYS \*  
> 1) “redis”  
> 10.0.0.69:6379> get redis  
> “liang”  
> **注：配置了主从，从节点无法直接添加数据。  
> 10.0.0.68:6379> set redis01 test  
> (error) READONLY You can’t write against a read only slave.**

### 六、redis管理脚本 ###

[root@redis redis]# cat /scritp/redis.sh 
    #!/bin/bash
    \# chkconfig: 3 3389 3390
    . /etc/rc.d/init.d/functions
    Redis_Port=6379
    Redis_Host=10.0.0.67
    Redis_Passwd=000000
    Redis_Pid=/var/run/redis_${Redis_Port}.pid
    Redis_Config=/application/redis/redis.conf
    Redis_Cli=/application/redis/redis-cli
    Redis_Server=/application/redis/redis-server
    Redis_Num(){
    if [ $# -ne 1 ];then
            echo "Usage: /etc/init.d/redis {start|stop|status|restart|}"
            exit 2
    fi
    }
    Redis_start(){
            if [ -f "$Redis_Pid" ];then
                    echo "redis .......running"
            else
                    ${Redis_Server} ${Redis_Config} >/dev/null 2>&1
                    action "redis .......start" /bin/true
            fi
    }
    Redis_stop(){
            if [ -f "$Redis_Pid" ];then
                    ${Redis_Cli} -h ${Redis_Host} -p ${Redis_Port} -a ${Redis_Passwd} shutdown
                    action "redis .......stop" /bin/true
            else
                    echo "redis .......shutdown"
            fi
    }
    Redis_status(){
            if [ -f "$Redis_Pid" ];then
                    echo "redis .......running"
            else
                    echo "redis .......shutdown"       
            fi
    }
    Redis_restart(){
            Redis_stop
            Redis_start
    }
    Redis_Case(){
    case $1 in
    start|START)
            Redis_start
    ;;
    stop|STOP)
            Redis_stop
    ;;
    status|STATUS)
            Redis_status
    ;;
    restart)
            Redis_restart
    ;;
    *)
            echo "Usage: /etc/init.d/redis {start|stop|status|restart|}"
    ;;
    esac
    }
    Redis_Cmd(){
            Redis_Num $1
            Redis_Case $1
    }
    Redis_Cmd $1

[http_download.redis.io_releases_redis-4.0.9.tar.gz]: http://download.redis.io/releases/redis-4.0.9.tar.gz
[README.md]: http://README.md