利用Nginx fastcgi_cache缓存加速wordpress

WordPress

注:本文更新于2018年1月28日

Nginx内置FastCgi缓存,但是不支持自动清除缓存。当你在Wordpress里面新建/修改一篇文章,或者访客提交评论的时候,自动清空相关的缓存是必要的!Nginx需要安装ngx_cache_purg+量身定做的WordPress缓存清理插件:Nginx Helper。

1. 安装Nginx ngx_cache_purge模块

1)查看ngx_cache_purge是否安装

nginx -V 2>&1 | grep -o ngx_cache_purge

显示ngx_cache_purge表示已经安装

2)安装ngx_cache_purge模块

《OneinStack》和《lnmp一键安装包》下安装ngx_cache_purge模块

cd /root/oneinstack/src
wget http://labs.frickle.com/files/ngx_cache_purge-2.3.tar.gz
wget http://nginx.org/download/nginx-1.13.0.tar.gz #根据自己需要的nginx版本下载
tar xzf ngx_cache_purge-2.3.tar.gz
tar xzf nginx-1.13.0.tar.gz
cd nginx-1.13.0
nginx -V #查看nginx编译参数,最后加上--add-module=../ngx_cache_purge-2.3
./configure --prefix=/usr/local/nginx --user=www --group=www \
--with-http_stub_status_module --with-http_v2_module --with-http_ssl_module \
--with-ipv6 --with-http_gzip_static_module --with-http_realip_module \
--with-http_flv_module --with-ld-opt=-ljemalloc \
--add-module=../ngx_cache_purge-2.3
make  #编译
mv /usr/local/nginx/sbin/nginx{,_`date +%F`}  #备份nginx
cp objs/nginx /usr/local/nginx/sbin
nginx -V 2>&1 | grep -o ngx_cache_purge
# 显示ngx_cache_purge表示已经安装成功

2. Nginx配置

建议将fastcgi_cache_path设置tmpfs内存中,操作系统不同tmpfs路径也不同,如下:

CentOS:/dev/shm

Ubuntu和Debian:/run/shm

修改nginx虚拟主机配置文件/usr/local/nginx/conf/vhost/blog.linuxeye.com.conf:(仅供参考)

fastcgi_cache_path /dev/shm/nginx-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
server {
listen 443 ssl http2;
ssl_certificate /usr/local/nginx/conf/vhost/linuxeye_blog.crt;
ssl_certificate_key /usr/local/nginx/conf/vhost/linuxeye_blog.key;
ssl_ciphers "CHACHA20:GCM:HIGH:!DH:!RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS";
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
#ssl_stapling on;
#ssl_stapling_verify on;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;
server_name blog.linuxeye.com;
access_log /home/wwwlogs/blog_nginx.log combined;
index index.html index.htm index.php;
include wordpress.conf;
root /home/wwwroot/blog;
set $skip_cache 0;
if ($request_method = POST) {
    set $skip_cache 1;
    }
if ($query_string != "") {
    set $skip_cache 1;
    }
if ($request_uri ~* "/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {
    set $skip_cache 1;
    }
if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {
    set $skip_cache 1;
    }
location ~ [^/]\.php(/|$) {
    #fastcgi_pass remote_php_ip:9000;
    fastcgi_pass unix:/dev/shm/php-cgi.sock;
    fastcgi_index index.php;
    include fastcgi.conf;
    fastcgi_cache_bypass $skip_cache;
    fastcgi_no_cache $skip_cache;
    fastcgi_cache WORDPRESS;
    fastcgi_cache_valid  60m;
    }
location ~ /purge(/.*) {
    allow 127.0.0.1;
    deny all;
    fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";
    }
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|ico)$ {
    expires 30d;
    access_log off;
    }
location ~ .*\.(js|css)?$ {
    expires 7d;
    access_log off;
    }
}

使nginx配置生效

service nginx reload

重启系统后shm内存中nginx-cache文件夹会丢失,为了使重启生效(自动创建文件夹),修改/etc/init.d/nginx的make_dirs下一行(大概52行)添加:

[ ! -d '/dev/shm/nginx-cache' ] && { mkdir /dev/shm/nginx-cache; chown -R ${user}.$user /dev/shm/nginx-cache; }

3. WordPress安装Nginx Helper插件

WordPress后台【插件】—【安装插件】搜索【Nginx Helper】安装即可。如下设置:

修改wordpress网站根目录wp-config.php添加如下行:

define('RT_WP_NGINX_HELPER_CACHE_PATH','/dev/shm/nginx-cache');

结束。此文转自linux运维笔记。

 

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  1. doocii:

    不错,我已经成功用到,感谢。

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