Nginx+keelplivs高可用_nginx+keplike-优快云博客

本文介绍如何使用Nginx与Keepalived实现高可用性负载均衡集群。通过配置两台Keepalived服务器作为主备，配合Nginx服务器提供稳定的服务。文章详细展示了设置步骤，包括安装软件包、配置内核参数、编写Keepalived及Nginx配置文件等。

Nginx+keelplivs
先准备4台虚拟机
第一台虚拟机
yum -y install keepalived.x86_64 ipvsadm.x86_64
sysctl -a | grep ip_forward #开启内核IP转发
echo “net.ipv4.ip_forward = 1” #输出net.ipv4.ip_forward = 1
echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf ; sysctl -p#验证net.ipv4.ip_forward = 1
vim /etc/keepalived/keepalived.conf #进入keepalived.conf把文件内容改为下列
vrrp_instance VI_1 {
state MASTER #备用服务器为BACKUP
interface ens33
virtual_router_id 51
priority 100 #备用服务为90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.126.150 #vip地址
}
}

virtual_server 192.168.126.150 80 {
delay_loop 6
lb_algo rr #调度算法：rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq
lb_kind DR #lvs工作模式：DR|TUN|NAT
persistence_timeout 0
protocol TCP

real_server 192.168.126.137 80 {			#改为nginx主机3的ip
    weight 1
    TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
    }
}

real_server 192.168.126.130 80 {		#改为nginx主机4的ip
    weight 1
    TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
    }
}

}
systemctl restart keepalived.service #重启keeplived
第二台虚拟机
yum -y install keepalived.x86_64 ipvsadm.x86_64
sysctl -a | grep ip_forward #开启内核IP转发
echo “net.ipv4.ip_forward = 1” #输出net.ipv4.ip_forward = 1
echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf ; sysctl -p#验证net.ipv4.ip_forward = 1
vim /etc/keepalived/keepalived.conf #进入keepalived.conf把文件内容改为下列
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.126.150 #vip地址
}
}

virtual_server 192.168.126.150 80 {
delay_loop 6
lb_algo rr #调度算法：rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq
lb_kind DR #lvs工作模式：DR|TUN|NAT
persistence_timeout 0
protocol TCP

real_server 192.168.126.137 80 {			#改为nginx主机3的ip
    weight 1
    TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
    }
}

real_server 192.168.126.130 80 {		#改为nginx主机4的ip
    weight 1
    TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
    }
}

}
systemctl restart keepalived.service #重启keeplived
第三台虚拟机
yum –y install nginx
vim /etc/nginx/nginx.conf #修改默认文件
42:root /web; #可以改成任意位置
mkdir /web #创建修改的路径
vim /web/index.html #在路径中写测试页面

11111111

chown –Rf nginx:nginx /web #赋权
systemctl restart nginx #重启nginx
cat /web/index.html #查看测试页面

11111111

sysctl -a | grep ip_forward #开启内核IP转发
echo “net.ipv4.ip_forward = 1” #输出net.ipv4.ip_forward = 1
echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf ; sysctl -p#验证net.ipv4.ip_forward = 1
vim lvsdr.sh #添加内容如下
ifconfig lo:0 192.168.126.150 broadcast 192.168.126.150 netmask 255.255.255.255 up
route add -host 192.168.126.150 dev lo:0
echo “1” > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo “2” > /proc/sys/net/ipv4/conf/lo/arp_announce
echo “1” > /proc/sys/net/ipv4/conf/all/arp_ignore
echo “2” > /proc/sys/net/ipv4/conf/all/arp_announce
chmod +x lvsdr.sh #赋权
./lvsdr.sh #运行脚本
第四台虚拟机
Yum-y install nginx
vim /etc/nginx/nginx.conf #修改默认文件
42:root /web; #可以改成任意位置
mkdir /web #创建修改的路径
vim /web/index.html #在路径中写测试页面

22222222

chown –Rf nginx:nginx /web #赋权
systemctl restart nginx #重启nginx
cat /web/index.html #查看测试页面

22222222

sysctl -a | grep ip_forward #开启内核IP转发
echo “net.ipv4.ip_forward = 1” #输出net.ipv4.ip_forward = 1
echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf ; sysctl -p#验证net.ipv4.ip_forward = 1
vim lvsdr.sh #添加内容如下
ifconfig lo:0 192.168.126.150 broadcast 192.168.126.150 netmask 255.255.255.255 up
route add -host 192.168.126.150 dev lo:0
echo “1” > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo “2” > /proc/sys/net/ipv4/conf/lo/arp_announce
echo “1” > /proc/sys/net/ipv4/conf/all/arp_ignore
echo “2” > /proc/sys/net/ipv4/conf/all/arp_announce
chmod +x lvsdr.sh #赋权
./lvsdr.sh #运行脚本
可以在第一台或第二台测试也可以通过浏览器进行测试
虚拟机测试
[root@localhost ~]# curl 192.168.126.150