KeepAlived+Redis+Haproxy实现主从热备、负载均衡、秒级切换

最新推荐文章于 2024-11-26 20:44:42 发布

jimmy-lf

最新推荐文章于 2024-11-26 20:44:42 发布

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本文链接：https://blog.youkuaiyun.com/m0_49821830/article/details/108682897

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本文详细介绍了一种基于Redis集群、HAProxy负载均衡、Keepalived主从热备的高可用架构部署方案。通过三个主要步骤，即部署Redis集群、配置HAProxy实现访问轮询、及使用Keepalived确保主从热备与秒级切换，来保障系统的稳定性和可靠性。

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一、部署Redis集群

1、环境

3台虚拟机模拟6个节点，一台机器2个节点，创建出3 master、3 salve 环境
redis1: 192.168.122.34
redis2: 192.168.122.22
redis3: 192.168.122.188

[root@redis1 ~]# getenforce 
Disabled
[root@redis1 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
     
[root@redis1 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.34 redis1
192.168.122.22 redis2
192.168.122.188 redis3

[root@redis2 ~]# getenforce 
Disabled
[root@redis2 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
     
[root@redis2 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.34 redis1
192.168.122.22 redis2
192.168.122.188 redis3

[root@redis3 ~]# getenforce 
Disabled
[root@redis3 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)

[root@redis3 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.34 redis1
192.168.122.22 redis2
192.168.122.188 redis3

2、安装 redis 实例（6节点）

在redis1 redis2 redis3执行此脚本,安装redis。

#!/usr/bin/env bash
#make install redis
network(){
   
    ping -c2 www.baidu.com &>/dev/null
    if [ $? -ne 0 ];then
        echo "network is error...."
        exit
     
    fi
    
}

test(){
   
[ $? -ne 0 ] && echo "excution error....";exit

}

install_gcc(){
   
    yum -y install gcc glibc glibc-kernheaders  glibc-common glibc-devel make
    yum -y install centos-release-scl
    yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
#    scl enable devtoolset-9 bash
    source /opt/rh/devtoolset-9/enable
    echo "source /opt/rh/devtoolset-9/enable" >>/root/.bashrc
}
install_redis(){
   
    
    wget http://download.redis.io/releases/redis-6.0.8.tar.gz
    tar -zxvf redis-6.0.8.tar.gz -C /usr/local
    mv /usr/local/redis-6.0.8 /usr/local/redis
    cd /usr/local/redis
    make && make all

}
redis_MS(

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