No work at all; basic coreos is just docker managed by systemd. Can you make your application docker-izable? Were you planning on using process management? If you answered yes to both of these questions... :)
Further, coreos tries to make you write applications in a 12-factor-y way, so when the time does come for you to use a million machines, you won't need to make huge adjustments to your deployments (just plug the container and init script into fleet and let it roll).
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No work at all; basic coreos is just docker managed by systemd. Can you make your application docker-izable? Were you planning on using process management? If you answered yes to both of these questions... :)
Further, coreos tries to make you write applications in a 12-factor-y way, so when the time does come for you to use a million machines, you won't need to make huge adjustments to your deployments (just plug the container and init script into fleet and let it roll).