Redis7.2.x主从复制的实现示例_Redis

ip	操作系统	服务	版本
192.168.140.153	centos 7	remaster	7.2.5
192.168.140.159	centos 7	redis-slave	7.2.5

一、安装依赖

yum -y install gcc gcc-c++

二、安装redis

1、下载安装包

wget http://download.redis.io/releases/redis-7.2.5.tar.gz

2、解压

tar -zxvf redis-7.2.5.tar.gz -c /opt/

3、创建工作目录

mkdir -p /opt/redis/
mkdir -p /opt/redis/logs/

4、编译安装

# 进入解压目录
cd /opt/redis-7.2.5

# 编译
make

# 安装
make install prefix=/opt/redis/

5、修改配置文件（master）

cp /opt/redis-7.2.5/redis.conf /opt/redis/

vi /opt/redis/redis.conf
# 修改如下内容
bind 192.168.140.153 -::1
# 允许后台运行
daemonize yes
# pid文件位置
pidfile /opr/redis/redis_6379.pid
# 日志位置
logfile "/opt/redis/logs/redis.log"
# 工作目录
dir /opt/redis/
# 主从同步密码
masterauth final123
# redis密码
requirepass final123

6、修改配置文件（slave）

cp /opt/redis-7.2.5/redis.conf /opt/redis/

vi /opt/redis/redis.conf
# 修改如下内容
bind 192.168.140.153 -::1
# 允许后台运行
daemonize yes
# pid文件位置
pidfile /opr/redis/redis_6379.pid
# 日志位置
logfile "/opt/redis/logs/redis.log"
# 工作目录
dir /opt/redis/
# 主从同步密码
masterauth final123
# redis密码
requirepass final123

replilcaof 192.168.140.153 6379

7、创建启动脚本

[root@localhost redis]# vi /etc/systemd/system/redis.service
[unit]
description=redis
after=network.target
 
[service]
type=simple
user=root
group=root
execstart=/opt/redis/bin/redis-server /opt/redis/redis.conf --daemonize no
restart=always
limitnproc=65535
limitnofile=65535
 
[install]
wantedby=multi-user.target

8、启动服务

systemctl daemon-reload
systemctl start redis.service
systemctl enable redis.service

三、测试

1、配置环境变量

[root@localhost redis]# vi /etc/profile
# 在最后添加如下内容
path=${path}:/opt/redis/bin/

[root@localhost redis]# source /etc/profile

2、查看redis-master

[root@localhost redis]# redis-cli -h 192.168.140.153
192.168.140.153:6379> auth final123
ok
192.168.140.153:6379> info replication
# replication
role:master
connected_slaves:1
slave0:ip=192.168.140.159,port=6379,state=online,offset=350,lag=1
master_failover_state:no-failover
master_replid:28a3b660f11504c07b2cc4bc07a093970af1544b
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:350
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:350

3、查看redis-slave

[root@localhost redis]# redis-cli -h 192.168.140.159
192.168.140.159:6379> auth final123
ok
192.168.140.159:6379> info replication
# replication
role:slave
master_host:192.168.140.153
master_port:6379
master_link_status:up
master_last_io_seconds_ago:6
master_sync_in_progress:0
slave_read_repl_offset:406
slave_repl_offset:406
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:28a3b660f11504c07b2cc4bc07a093970af1544b
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:406
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:406

4、master节点插入数据

192.168.140.153:6379> set test "master"
ok
192.168.140.153:6379> get test
"master"

5、slave节点查看数据是否同步

192.168.140.159:6379> get test
"master"
# slave节点只能读取，不能写入。
192.168.140.159:6379> set test1 "ceshi"
(error) readonly you can't write against a read only replica.

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