第十二周-day52(下)-Keepalived高可用

最新推荐文章于 2025-01-30 20:21:26 发布

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最新推荐文章于 2025-01-30 20:21:26 发布

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分类专栏：集群架构笔记文章标签： linux

本文链接：https://blog.youkuaiyun.com/qq_37242520/article/details/91984818

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本文详细介绍如何使用Keepalived和VRRP实现服务器的高可用性配置，包括环境准备、软件安装、服务启动与自启动、配置文件详解及测试过程。文章深入探讨了主备切换机制，并提出当核心应用如nginx出现故障或网络中断时的应对策略。

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Keepalived高可用软件

VRRP

1.准备环境

准备机器lb01 lb02 web01 web02
lb01 lb02 安装软件
yum install keepalived -y

[root@lb01 nginx]# rpm -qa keepalived 
keepalived-1.3.5-8.el7_6.x86_64

[root@lb02 ~]# rpm -qa keepalived 
keepalived-1.3.5-8.el7_6.x86_64

2.开启服务与自启动

lb01:
[root@lb01 nginx]# systemctl start keepalived.service 
[root@lb01 nginx]# systemctl enable keepalived.service 

lb02:
[root@lb02 ~]# systemctl start keepalived.service 
[root@lb02 ~]# systemctl enable keepalived.service

2.利用Wireshark抓包

随便抓个包看看：

3.配置文件

/etc/keepalived/keepalived.conf

配置文件格式：

修改前将源配置文件备份

[root@lb01 nginx]# vim  /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
    router_id lb01
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 150
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
     10.0.0.3/24 dev eth0 label eth0:1  
    }
}