We know that "Origin Pull" Content Delivery Networks only require us to change the static file URLs (CSS, JS, images, etc.) so that these static files will be downloaded from a CDN instead of our web server.
The Let's Encrypt is a certificate authority that offers free and automated SSL/TLS certificates for your website(s). It issues certificates trusted by most browsers. In this article will show how to setup and automate the renewal of Let's Encrypt SSL/TLS certificates with Nginx.
The Nginx+PHP FPM is the ideal web-server setup as this is more faster web service. This article should be a continuation of this article (just skip the "Configure Apache" section and if you are not using Virtualmin, skip the "Configure Virtualmin" section.).
The following procedures are tested on Linode server running Centos 7 64-bit Linux distribution.
This solution should apply to Drupal sites that uses Nginx as web server with PHP FPM and the Nginx configuration is based on perusio's Nginx configuration for running Drupal.
This article will guide on setting up Solr Admin web interface in Nginx. If you haven't installed Solr in your system, please check this article Step by step guide to setup Apache Solr 5.x in CentOS 7 for Drupal 7 Panopoly distro using Search API. Please follow this guide if you haven't setup your Nginx yet.
Create a domain for Solr, in this guide lets use solr.mywebsite.com. Go to DNS manager and add "solr" as A record for mywebsite.com
Pagespeed rename the static resources (like images, CSS, etc.) file name to mark as optimized and there instances where the Pagespeed optimized web pages' resources returns 404 not found and for several browser refresh they eventually loads up. In this case, Pagespeed is still in the process of optimizing the web pages' resources. We can handle this issue by the following Nginx script:
The issue is only at the website home page's PHP script has the download behaviour but the rest of the website pages' PHP script run normally. In this article will show two solutions. This issue is very hard to debug because there are no helpful logs that will give hint on solving this issue. Actually, I was debugging a "Permission denied" issue and the fixes I tried to apply to this resulted to our main topic issue. The web server setup: Nginx as reverse proxy to Apache and under a web hosting control panel.
The web browsers by default limits number of concurrent connections for each host. When that limit exceeds, the resources (like CSS, images, etc.) will remain in queue waiting to be downloaded until the prior downloads are completed. This results slow page load times user experience. One solution to reduce page load time is by domain sharding. This technique splits the resources download across multiple sub-domains (eg. static1.webfoobar.com, static2.webfoobar.com) resulting an increase in simultaneous connections.
The Munin's generated web pages are very old fashioned and dull. Its design uses tables with small text and too much spaces. This guide will show how to change the Munin's template and should be continuation of Setup Munin on CentOS 7 with nginx. There will be two alternative Munin 2.x templates will be shown here:
This alternative template uses jQuery and Twitter Bootstrap for Munin 1.x and 2.x versions that enhanced user experience and improve web pages' appearance. The following are the steps to setup this template:
Monit can manage and monitor processes, programs, files, directories and filesystems of your UNIX server for you. You can program Monit to execute action for events like: service stops running or its using too much CPU or a host is unreachable. The following steps are tested running on my Linode server running Centos 7 64-bit. It is assumed that nginx is already installed in your system. If not, please follow this guide.