单台web服务器实现http访问自动跳转到https：

方法一：利用地址重写功能
server {
listen 80;
server_name www.etiantian.org;
rewrite ^(.*)$ https://$host$1 permanent;
}
说明：在https配置server基础上再添加http跳转server

方法二：利用error_page识别错误码信息进行跳转
server {
listen 443;
server_name www.etiantian.org;
ssl on;
ssl_certificate /application/nginx/conf/key/server.crt;
ssl_certificate_key /application/nginx/conf/key/server.key;
location / {
root html/www;
index index.html index.htm;
}
}
说明：497为内置错误码，当访问http无法处理，需要利用https处理时

利用反向代理服务器进行http到https跳转

1：修改地址池信息
upstream www_server_pools {
server 10.0.0.7:443;
server 10.0.0.8:443;
server 10.0.0.9:443;
}

2：修改地址池调用信息
server {
listen 443;
server_name www.etiantian.org;
ssl on;
ssl_certificate /application/nginx/conf/key/server.crt;
ssl_certificate_key /application/nginx/conf/key/server.key;
location / {
proxy_pass https://www_server_pools;
}
}

3：定义http到https跳转配置信息
server {
listen 80;
server_name www.etiantian.org;
rewrite ^(.*)$ https://$host$1 permanent;
}