RHEV-M Mechanism for adding additional fence agents

Issue

• None of our systems directly access the iLO or iDRAC. Therefore RHEV-M needs to have the ability to add in a custom fence agent.

• None of the service processors, ilo/drac/... have IP connectivity. Currently we rely on RS-232 serial connectivity from a terminal server to the server's external serial port. The service processor is accessed by invoking its shell via special escape sequence over the serial port, e.g. HP and Dell use

  <ESC>+(
  

• Console Server connects to the serial ports via ssh to the terminal server(dedicated tcp port per serial port).

• Is it possible to re-use fencing scripts used with Red Hat High Availability Add On
• A custom fencing mechanism is needed that lets us specify a script that will be called when a power action needs to be taken on a hypervisor.