centos7下systemd实现tomcat多实例配置方法

                proxy_pass              http://tomcat ;
                proxy_redirect          off;
                proxy_set_header        Host $host;
                proxy_set_header        X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_cache_use_stale   error timeout invalid_header updating http_500 http_502 http_503 http_504;
 
                proxy_connect_timeout   300;
                proxy_send_timeout      300;
                proxy_read_timeout      300;
                proxy_http_version      1.1;
                proxy_set_header        Connection "";
 
                proxy_cache             static;
                proxy_cache_key         $host$uri$is_args$args;
                proxy_cache_valid       200 302 5m;
                proxy_cache_valid       404 1m;
                proxy_cache_valid       any 1h;
                add_header              X-Cache $upstream_cache_status;
 
                #log_not_found off;