• 价格昂贵，HTTPS支持并发数太低
• 技术门槛比较高，学习成本大
• 技术Bug修复方面都太慢
• 商用产品在新功能技术支持方面（如H2,protocol_proxy支持）滞后

• 机房A和机房B即可主备也可双主，避免单点
• 四层接入方面，当OSPF发生故障，可以用Nginx做备用，直接指向L7服务器组
• 双机房L7服务器组也可以同时提供服务，避免单点
• 双机房L7服务器组配置保持同步，安装方式采用静态编译安装，复制考贝启动即可

• 网络相关配置[list=square][*]服务器部分配置如下：

#OS基于Centos7，测试环境，生产环境根据实际情况修改
#安装路由软件
yum install quagga
#配置zebra
#cat /etc/quagga/zebra.conf
!
! Zebra configuration saved from vty
!   2017/09/28 15:57:12
!
hostname test-ssl-10-231.test.org #这个每台名字要不同
password 8 WuN0UOEsh./0U
enable password 8 g9UPXyneQv2n.
log file /var/log/quagga/zebra.log
service password-encryption
#配置ospfd
# cat /etc/quagga/ospfd.conf
hostname test-ssl-10-231.test.org #每台要不同
password 8 cQGHF4e9QbcA 
enable password 8 RBUKMtvgMhU3M
log file /var/log/quagga/ospfd.log
service password-encryption
!
!
!
interface eth2
 ip ospf authentication message-digest
 ip ospf message-digest-key 1 md5 pIW87ypU3d4v3pG7 #此处密码告知网络工程师
 ip ospf hello-interval 1
 ip ospf dead-interval 4
 ip ospf priority 0

router ospf
 ospf router-id 10.10.41.130 #每台router-id要不一样
 log-adjacency-changes
 network 10.10.41.0/24 area 0.0.0.0
 network 10.10.100.100/32 area 0.0.0.0 #宣告自己的ospf互边地址和VIP地址，新增地址都在此处添加
 area 0.0.0.0 authentication message-digest
!
line vty
!

#启动服务
systemctl enable zebra.service
systemctl enable ospfd.service
systemctl start zebra.service
systemctl start ospfd.service
#添加ospf和zebra保活,打开配置文件打开如下行行
vim /etc/sysconfig/quagga
WATCH_DAEMONS="zebra ospfd"
######策略路由配置，eth0指向默认路由，在eth1模拟公网进行配置######
#cat /etc/iproute2/rt_tables增加
100 wan41
#增加路由表相关配置
ip route add 10.10.41.0/24 dev eth1 src 10.10.41.130 table wan41
ip route add default via 10.10.41.250 table wan41
ip rule add from 10.10.41.130 table wan41
持久化到配置文件
cat route-eth1
10.10.41.0/24 dev eth2 src 10.10.41.130 table wan41
default via 10.10.41.250 table 100
cat rule-eth1
from 10.10.41.130 table wan41
######策略路由配置结束######

• [list=square][*]交换机配置部分（略）

• 增加zebra ospfd保活[list=square][*]打开/etc/sysconfig/quagga注释以下行：WATCH_DAEMONS="zebra ospfd"

[size=12]server context listen增加如下：
listen 80 proxy_protocol;
listen 443 http2 proxy_protocol;
#log_format ,要配置$proxy_protocol_addr $proxy_protocol_port,
log_format  xff  '$proxy_protocol_addr:$proxy_protocol_port $http_x_forwarded_for - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" "$http_user_agent" "$host" '
                      '$request_time "$upstream_addr" "$upstream_response_time" "$server_protocol"';[/size]

• nginx tcp 四层代理配置

[size=12]stream {
log_format proxy '$remote_addr:$remote_port [$time_local] '
                 '$protocol $status $bytes_sent $bytes_received '
                 '$session_time "$upstream_addr" '
                 '"$upstream_bytes_sent" "$upstream_bytes_received" "$upstream_connect_time"';
upstream backend-test {
    server 10.x.x.233:80;
}
upstream backend-test_ssl {
    server 10.x.x.233:443;
}
        server {
                listen 80;
                proxy_protocol on;
                proxy_pass backend-test;
                access_log  /opt/test/logs/nginx/m.test.com.log proxy ;
        }
        server {
                listen 443;
                proxy_protocol on;
                proxy_pass backend-test_ssl;
                access_log  /opt/test/logs/nginx/m.test.com.log proxy buffer=1k flush=1s;
        }
}[/size]

• nginx 加入sysctemctl管理，并加入开机启动

[Unit]
Description=nginx
After=network.target
[Service]
Type=forking
ExecStart=/opt/test/nginx/sbin/nginx
ExecReload=/opt/test/nginx/sbin/nginx -s reload
ExecStop=/opt/test/nginx/sbin/nginx -s stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
#开机启动
systemctl enable nginx.service

• 新增IP

[size=12]cat addip.sh
#!/bin/bash
ip=$1
pswd="test123"
expect -c " set timeout 30
eval spawn -noecho telnet 127.0.0.1 2604
expect \"Password:\"
send \"$pswd\r\"
expect \" *>\"
send \"enable\r\"
expect \"Password:\"
send \"$pswd\r\"
expect \" *#\"
send \"configure t\r\"
expect \" *(config)#\"
send \"router ospf\r\"
expect \" *(config-router)#\"
send \"network $ip/32 area 0.0.0.0\r\"
expect \" *(config-router)#\"
send \"w\r\"
send \"exit\r\"
send \"exit\r\"
send \"exit\r\"
interact" >/dev/null
###增加策略路由
ip addr add 10.10.100.103/32 dev lo:1
ip rule add from 10.10.100.103 table wan41
###持久化到配置文件
#rule-lo:1
from 10.10.100.103 table wan41[/size]

• 保活

[size=12]#故障，OSPF下线，恢复自动上线，监控
set mailserver mail.test.com port 25
set mail-format {
  from:devops-notice@test.com
  subject:Nginx-L4 $SERVICE $EVENT at $DATE
  message:Monit $ACTION $SERVICE at $DATE on $HOST: $DESCRIPTION.
}
set alert admin@test.com
check process nginx with pidfile /opt/test/nginx/logs/nginx.pid
  if does not exist for 3 cycles then exec "/bin/systemctl stop zebra"  else if succeeded for 3 cycles then exec "/bin/sh /opt/test/sysadmin/o
spf_start.sh"
check host  Nginx-L4 with address 10.x.x.250
  if failed ping count 5 with timeout 1 seconds then exec "/bin/systemctl stop zebra"  else if succeeded then exec "/bin/sh /opt/test/sysadmin/o
spf_start.sh"[/size]

• 性能测试数据

出处：https://zhuanlan.zhihu.com/p/32122459