Delayed Serial STONITH
A modified version of John Sutton’s rcd_serial cable coupled with our Supermicro reset switch hijacker: This works with the rcd_serial fence agent plugin. Reasons rcd_serial makes for a very good STONITH mechanism: It has no dependency on power state. It has no dependency on network state. It has no dependency on node operational state. It has no dependency on external hardware. It costs less that $5 + time to build. It is incredibly simple and reliable. Essentially the most common STONITH agent type in use is probably those that control UPS / PDUs, while this sounds like a good idea in theory there are a number of issues with relying on a UPS / PDU: ...