Rkt integration with Packer

[Luke Farnell]

Hey Everyone,

I'm interested in creating a Rkt builder for packer.io and was curious about if Rkt has a API would can be used instead of  shelling out to the command line? Recently, someone from the packer core team is moving the docker builder to the API instead of the command line and I was hoping I could take the same approach for the Rkt builder. I do see that Rkt has the api-service but it looks like its read-only, so that wouldn't work. Anyone have any thoughts on what the best approach would be?

Thanks,

Luke

[Angus Lees]

rkt deliberately doesn't have a server/client architecture - so whatever you use will end up building some sort of command line and fork/exec'ing it.

If you wanted to, you could certainly introduce some sort of daemon that received network messages before invoking rkt, but all you've done is complicate error recovery, lifetime management, permission handling, resource accounting, etc by separating the callee from the caller's process tree.  (Just saying...)

 - Gus

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