Support using rkt cas? about build HOT 7 OPEN

@dgonyeo:

1. acbuild w/o download cache is basically unusable for us

2. surely there is a way to implement some simple time-based check hack now rather than then wait for "proper CAS" never, right?

from build.

I'd be in favor of completely sharing the backend format. Right now one downside to acbuild is it doesn't save your dependencies between builds. It wouldn't be hard to modify acbuild to keep them around, but I feel like rkt's implementation of holding on to images is a little more battle tested.

I imagine this would default to somewhere other than rkt's cas, but could be easily pointed at /var/lib/rkt/cas.

Any chance we could break all of rkt's cas logic out into a separate library, that just both rkt and acbuild can use? I don't know how tightly it's coupled to the other parts of rkt, but I think that would help any compatibility issues.

from build.

I think you should be able to pull in the store pkg without too much of a
rat's nest of dependencies.

Derek Gonyeo [email protected] schrieb am Do., 19. Nov. 2015 12:02:

I'd be in favor of completely sharing the backend format. Right now one
downside to acbuild is it doesn't save your dependencies between builds. It
wouldn't be hard to modify acbuild to keep them around, but I feel like
rkt's implementation of holding on to images is a little more battle tested.

I imagine this would default to somewhere other than rkt's cas, but could
be easily pointed at /var/lib/rkt/cas.

Any chance we could break all of rkt's cas logic out into a separate
library, that just both rkt and acbuild can use? I don't know how tightly
it's coupled to the other parts of rkt, but I think that would help any
compatibility issues.

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#125 (comment).

from build.

I'm working on this now, and I'd like to note that this will require adding commands to acbuild to fetch/list/remove images. To avoid potentially scary compatibility issues between acbuild's and rkt's cas, I think I'm just going to make it easy for a user to get acbuild to print out the location of a given .aci in its cas, or to even have acbuild exec rkt fetch for the user (as opposed to pointing acbuild's cas logic at /var/lib/rkt).

from build.

Hi all,
even if we are anyhow using rkt for our container registry and also I don't think it is a huge dependency, I would suggest to implement something like an automated switch (if rkt is in path, use it, otherwise be limited to the current implementation or one that is a little advanced probably).
It would be great if you could implement this soon, as this takes a lot of time (downloading the images again and again)...

Thanks,
Stefan

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@jonboulle @dgonyeo Any updates on this one?

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#222

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