Caching docker directory to speed up image loading about dcind HOT 3 OPEN

@dsawa No, I couldn't find a way to persist the state between tasks runs using this image.

In the end I decided to change my approach: instead of using this task image, I SSH into a VM with Docker running there and pull the images rather than load them, so that layer caching can speed things up.

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@fenech Have you managed to find some kind of workaround ?
I have similar problem now.

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Note that the concourse documention on caches states:

The path to a directory to be cached.

Paths are relative to the working directory of the task. Absolute paths are not respected.

I usually set up caches in concourse like this:

script in the task amounting to (.sbt is just an example directory):

rm -rf ~/.sbt
ln -fs sbt-cache ~/.sbt

cache configuration in the task declaration

caches:
- path: sbt-cache

Perhaps you could confirm if that approach works for you (applied to the directory /scratch/docker)?

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