nginxのX-Forwarded設定

背景

nginx -> nginx -> railsのように多段のリバースプロキシーに対応した、nginxのX-Forwarded設定。

nginxのX-Forwarded設定 (location抜粋)

location @proxy {
    proxy_set_header Host $http_host;
    
    # 伝播させていく
    set $ssl off;
	if ($scheme = https) {
        set $ssl on;
	}
	if ($http_x_forwarded_for) {
		set $ssl $http_x_forwarded_for;
	}
	
	set $proto $scheme;
	if ($http_x_forwarded_proto) {
		set $proto $http_x_forwarded_proto;
	}			 
    
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-SSL $ssl;
    proxy_set_header X-Forwarded-Proto $proto;
    
    proxy_set_header X-Sendfile-Type X-Accel-Redirect;
    proxy_pass http://127.0.0.1:3000; 
    proxy_redirect off;		    	       
	internal;
}