SNI是一个TLS的扩展字段，经常用于访问域名跳转到不同的后端地址。
配置方式如下：打开nginx.conf文件，以ttbb/nginx:nake镜像为例/usr/local/openresty/nginx/conf/nginx.conf
如下为默认的nginx.conf配置
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|
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
|
在最后面添加上
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| stream {
map $ssl_preread_server_name $name {
backend.example.com backend;
default backend2;
}
upstream backend {
server 192.168.0.3:12345;
server 192.168.0.4:12345;
}
upstream backend2 {
server 127.0.0.1:8071;
}
server {
listen 12346;
proxy_pass $name;
ssl_preread on;
}
}
|
这个时候，我们已经开启了SNI转发的功能，如果你使用backend.example.com的域名访问服务器，就会转发到backend，如果使用其他域名，就会转发到backend2
测试的时候，让我们在/etc/hosts里进行设置，添加
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| 127.0.0.1 backend.example.com
|
然后进行请求
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| curl https://backend.example.com:12346
|
这里注意请求要使用https，http协议或者是tcp可没有SNI的说法
发现请求的确实是backend
然后测试请求127.0.0.1:12346
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| curl https://127.0.0.1:12346
|
