keepalive主从搭建

准备两台主机

10.1.1.127

10.1.1.128

两台主机都配置

rocky主机ip配置

# 1. 关闭防火墙并禁用开机自启

systemctl stop firewalld && systemctl disable firewalld

# 2. 临时关闭SELINUX（重启失效），永久关闭（重启生效）

setenforce 0

sed -i 's/^SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

# 3. 关闭NetworkManager（避免网络配置冲突，CentOS7必做）

systemctl stop NetworkManager && systemctl disable NetworkManager

# 4. 安装基础依赖（后续安装需要）

yum install -y wget net-tools gcc pcre-devel zlib-devel openssl-devel

# 5. 重启网络（确保配置生效）

systemctl restart network

安装nginx

yum install -y nginx

10.1.1.127主机nginx页面修改

10.1.1.128主机nginx页面修改

安装keepalive

Master节点安装

yum install -y keepalived

验证

# 备份原有配置文件（避免出错）

添加配置

[root@localhost keepalived]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

# router id, global unique, host uuid

router_id keep_17 #唯一标识，主备不一致

}

# vrrp conf, keepalived + nginx

vrrp_instance VI_1 {

# host -> master

state MASTER #主备不一致，主是master

# host interface name

interface ens160 #根据主机的网卡实际名称填写

# ensure master and backup are same

virtual_router_id 51 #主备一致

# weight, the larger, more chance to be master after master down

priority 100 #优先级，主的大

# between m & b time interval, default 1s

advert_int 1

# authenticate pwd, default

authentication {

auth_type PASS

auth_pass 1111 #密码，主备一致

}

# vip conf

virtual_ipaddress {

10.1.1.129 #虚拟ip，主备一致

}

}

Back节点配置

[root@localhost keepalived]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

# router id, global unique, host uuid

router_id keep_18

}

# vrrp conf, keepalived + nginx

vrrp_instance VI_1 {

# host -> master

state BACKUP

# host interface name

interface ens160

# ensure master and backup are same

virtual_router_id 51

# weight, the larger, more chance to be master after master down

priority 80

# between m & b time interval, default 1s

advert_int 1

# authenticate pwd, default

authentication {

auth_type PASS

auth_pass 1111

}

# vip conf

virtual_ipaddress {

10.1.1.129

}

}

验证虚拟ip

停掉10.1.1.127的keepalive

访问虚拟ip10.1.1129，跳转到backup