Adapting Openshift Origin for High load
Openshift Origin is a Platform as a Service software platform which enables us to horizontally scale applications and also manage multiple applications in one cluster. One openshift node could contain many applications, the default settings allows for 100 gears (which could be 100 different applications or may be only 4 applications each with 25 gears). Each gear contains a separate apache instance. This post would describe adjustments that I have done on an Openshift M4 cluster that are deployed using the definitive guide . Maybe I really should upgrade the cluster to newer version, but we are currently running production load in this cluster. The Node architecture Load balancing in an Openshift application is done by haproxy. The general application architecture is shown below (replace Java with PHP for cases of PHP-based application) (ref : Openshift Blog : How haproxy scales apps ). The gear shown running code, for PHP applications, each consists of one Apache HTTPD instance...