HA HA HA. I’ve been talking about Bare Metal vs containers and virtualization for a while… again. I still do not have much good to say about virtualization except that orchestration can be fun and profitable. But here’s the thing.
Bare metal can fail to reboot
I just performed a syspatch on a bare metal OpenBSD installed MiniForum machine and in the throws
of the patch I realized that this was the second time I was patching the same packages. I cannot
say for sure what happened or why but it seemed like twice. That followed up with a ssh reboot
command… and for some reason the machine never came back. And so all that DR math rushed back into
mind.
The more machines in a network the more likely something is going to fail.
The more things fail the more likely that reparations are going to fail too… Take that blue/green servers during an upgrade. The blue server fails and green takes over. Now you have a different competition for survival. Get some hands and eyes to restart blue or start restoring green on a third machine.
three is the magic number
You need all three machines in order to give all parties a chance to experience all the failures. Sometimes as a simulation and others as real events. Practice makes perfect.