LNMP+Tomcat+Keepalived+LVS 多端口负载均衡

摘要: Keepalived配置文件.....

应用场景：Keepalived+LVS高可+负载均衡集群架构中rs同时跑httpd（80端口）和Java（8080端口）服务，使用Keepalived负载均衡多个端口。 如果想全部由80端口提供服务，则Keepalived+LVS负载均衡层就只开启80端口，内部节点使用nginx代理8080端口。

多端口负载均衡

[root@director sbin]# yum install -y keepalived

[root@Centos-1 sbin]# vim /etc/keepalived/keepalived.conf
vrrp_instance VI_1 {
state BACKUP
interface ens192
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass password
}
virtual_ipaddress {
192.168.14.13
}
}
virtual_server 192.168.14.13 80 {
delay_loop 10
lb_algo wlc
lb_kind DR
persistence_timeout 180
protocol TCP
real_server 192.168.14.127 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.128 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.129 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
virtual_server 192.168.14.13 8080 {
delay_loop 10
lb_algo wlc
lb_kind DR
persistence_timeout 180
protocol TCP
real_server 192.168.14.127 8080 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.128 8080 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.129 8080 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

在dir2上执行同样的操作，lvs多端口负载均衡，需要注意的是dir2机器上state改为BACKUP，priority设为90。

nginx反向代理Tomcat

在rs上创建nginx代理虚拟主机，名为zrlog.conf，然后配置内容如下：

[root@128rs2 ~]# vim /usr/local/nginx/conf/vhosts/zrlog.conf
server {
listen 80;
server_name www.3zuzrlog.com;

location / {
proxy_pass http://localhost:8080; proxy_redirect default;
proxy_set_header Host   $host;
proxy_set_header X-Real-IP      $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

此时Keepalived+LVS只需监听80端口即可：

[root@Centos-1 sbin]# vim /etc/keepalived/keepalived.conf
vrrp_instance VI_1 {
state BACKUP
interface ens192
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass password
}
virtual_ipaddress {
192.168.14.13
}
}
virtual_server 192.168.14.13 80 {
delay_loop 10
lb_algo wlc
lb_kind DR
persistence_timeout 180
protocol TCP
real_server 192.168.14.127 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.128 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.14.129 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}