近期要上线几个基于tornado+motor的移动端接口服务，众所周知，Apache和tornado天生八字不合，尤其apache对python3尤为的不友好，tornado和nginx才是木石前盟，另外由于apache目前系统占用确实比较高，不光进程数多，httpd竟然占用了200多M，太庞大，决定换为较轻量级，高并发的nginx。

如上图所示：系统也就2g ,除了mysql占用的100M, httpd 占了1/2 还多

首先由于apache和nginx默认都是监听80端口，所以首先要停止apache服务（为了保险起见，只是停止服务，不要卸载）

systemctl  stop httpd

第二步，安装nginx

#设置源sudo rpm -Uvh 安装yum install -y nginx#启动服务systemctl start nginx.service#开机自启systemctl enable nginx.service

由于机器上还有一些php服务，而nginx需要php-fpm的支持才能代理php，所以安装php-fpm

yum install php-fpmyum install php-mysql php-gd libjpeg* php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-bcmath php-mhash libmcrypt开启php服务systemctl start php-fpm开机启动php服务systemctl enable php-fpm

然后将原来apache的服务配置翻译成nginx的，二者大同小异，值得一提的是，关于https服务，nginx配置要简单很多

apache配置：

<VirtualHost _default_:443>#   General setup for the virtual hostDocumentRoot "/opt/v3u"ServerName v3u.cn:443ServerAdmin you@example.comErrorLog "/opt/lampp/logs/error_log"TransferLog "/opt/lampp/logs/access_log"#   SSL Engine Switch:#   Enable/Disable SSL for this virtual host.SSLEngine onSSLCertificateFile "证书目录"SSLCertificateKeyFile "证书目录"SSLCertificateChainFile "证书目录"<FilesMatch ".(cgi|shtml|phtml|php)$">    SSLOptions +StdEnvVars</FilesMatch><Directory "/opt/lampp/cgi-bin">    SSLOptions +StdEnvVars</Directory>BrowserMatch "MSIE [2-5]"          nokeepalive ssl-unclean-shutdown          downgrade-1.0 force-response-1.0CustomLog "/opt/lampp/logs/ssl_request_log"           "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x "%r" %b"</VirtualHost> 

翻译为ngixn的配置:

server {        listen 443 ssl;        server_name v3u.cn;        root /opt/v3u;location / {            index  index.html index.htm index.php;        rewrite ^/sitemap.xml$ /Index_sitemap last;	rewrite ^/resume$ /Index_resume last;	rewrite ^/search_(.+?)$ /Index_search_text_$1 last;	rewrite ^/a_id_(.+?)$ /Index_a_id_$1 last;	rewrite ^/ls_id_(.+?)$ /Index_ls_id_$1 last;	rewrite ^/l_id_(.+?)$ /Index_l_id_$1 last;                  if (!-e $request_filename) {   rewrite  ^(.*)$  /index.php?s=$1  last;   break;    }        }        ssl_certificate   证书目录;        ssl_certificate_key  证书目录;        location ~ .php(.*)$ {                fastcgi_pass   127.0.0.1:9000;                fastcgi_index  index.php;                fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;                fastcgi_param PATH_INFO $1;                include fastcgi_params;        }}

修改好配置文件，重启nginx

systemctl restart nginx.service

最后别忘了将apache的开机自启关闭

systemctl disable httpd

ok，到此从apache迁移到nginx就配置结束了，总体上没啥难度

由图上可知，应用了nginx之后，系统感觉清爽了很多，内存也节约了大约300多m，系统告别臃肿，轻装上阵。