[ignition] Rollback ignition to last working config

[Rahul Prabhu]

Hi,

I was wondering if there is a way I can include multiple sources of 
ignition configs, and have it reboot with the touching 
touch /boot/coreos/first_boot

For example,

    "ignition": {
      "config": {
        "append": [
          {
            "source": "https://source1.com/config.json";,
            "verification": {}
          },
          {
            "source": "https://source2.com/fallback.json";,
            "verification": {}
          }
        ]
      }

and have it restart with the first boot have on. I can do this at a cloud 
provider level, but can I do it with coreos primitives?

Thanks,
Rahul