An Action Hook is an entry point into application and platform lifecycle operations on OpenShift by Red Hat.
OpenShift by Red Hat provides application developers entry points into various application and platform lifecycle operations. These entry points are referred to as "action hooks", and have a special location within the application’s Git repository.
During any OpenShift process which supports an action hook, the application action hook directory will be checked for an executable file matching the specified name. If such a file is present, it will be executed before returning control to the process.