redis_cache + conditional purging + (Optional) Domain Mapping

easyengine (ee) note: If you are using easyengine, you can accomplish everything in this article using following command:

ee site create --wpsubdomain --wpredis

This article is an extension of the previous article: WordPress + Nginx + Redis cache .

Please read this to check if your Nginx have necessary modules to support caching with Redis.

WordPress Multisite + Subdomains/Domain-Mapping + Nginx + Redis cache

Make changes to /etc/nginx/sites-available/ file  so that it looks line one below:

server {
    #@DM - uncomment following line for domain mapping or you will need to add every mapped-domain to server_name list 
    #listen 80 default_server;
    server_name * ;
    #@DM - uncomment following line for domain mapping
    #server_name_in_redirect off;

    access_log   /var/log/nginx/;
    error_log    /var/log/nginx/;

    root /var/www/;
    index index.php;

#fastcgi_cache start set $skip_cache 0; # POST requests and urls with a query string should always go to PHP if ($request_method = POST) { set $skip_cache 1; } if ($query_string != "") { set $skip_cache 1; } # Don't cache uris containing the following segments if ($request_uri ~* "(/wp-admin/|/xmlrpc.php|/wp-(app|cron|login|register|mail).php|wp-.*.php|/feed/|index.php|wp-comments-popup.php|wp-links-opml.php|wp-locations.php|sitemap(_index)?.xml|[a-z0-9_-]+-sitemap([0-9]+)?.xml)") { set $skip_cache 1; } # Don't use the cache for logged in users or recent commenters if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") { set $skip_cache 1; }
location / { try_files $uri $uri/ /index.php?$args; } location /redis-fetch { internal ; set $redis_key $args; redis_pass redis; } location /redis-store { internal ; set_unescape_uri $key $arg_key ; redis2_query set $key $echo_request_body; redis2_query expire $key 6h; redis2_pass redis; } location ~ \.php$ { srcache_fetch_skip $skip_cache; srcache_store_skip $skip_cache; srcache_response_cache_control off;
set_escape_uri $escaped_key $key; srcache_fetch GET /redis-fetch $key; srcache_store PUT /redis-store key=$escaped_key; more_set_headers 'X-Cache $srcache_fetch_status'; more_set_headers 'X-Cache-2 $srcache_store_status'; include fastcgi_params; fastcgi_pass php; } location ~* ^.+.(ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|rss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ { access_log off; log_not_found off; expires max; } location = /robots.txt { access_log off; log_not_found off; } location ~ /. { deny all; access_log off; log_not_found off; } }

Save above configuration. Test and reload nginx configuration with following commands :

nginx -t && service nginx reload

Domain Mapping

You need to uncomment few lines in above nginx-config to get domain mapping working. Apart from above config changes, you can read this guide to setup/configure domain-mapping.

Links: Nginx-Helper Plugin | EasyEngine

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