Add the ability to run dgoss when the docker daemon is not local

[rmb938]

I have a use case where I want to run dgoss but the docker daemon is not on the local machine and the file system is not shared.

My idea would be to add a flag i.e --not-local or something and run https://goss.rocks/install inside the container to be tested then docker cp the goss yaml files.

[elliotweiser]

👍

I was playing with a similar concept outside of dgoss, but this seems like a good/valid use-case for it.

Implementation idea: only docker cp files instead of mounting volumes during docker run. In theory this would make dgoss compatible against both local and remote docker daemons.

[aelsabbahy]

Docker cp would be interesting. It would slow down dgoss a little bit and not allow testing of the log content.. but those could be disclaimers. Maybe dgoss could have a cp vs mount mode that a user can toggle though env vars.

I probably won't get around to this, but if someone submits a backwards compatible PR, I would review/merge.

[elliotweiser]

I may have some to look into this next week

[rmb938]

Here is the script with the docker cp modifications I made. I didn't add a flag, just replaced everything with docker cp so it will need some work before it is ready for a pr https://gist.github.com/rmb938/bfc92e5cfffd69ba66aabb9bb0e656eb

Oh I also switched it to sh from bash for containers that don't have bash installed.

[aelsabbahy]

Closed by #271 it's on the master branch now. I usually don't cut releases for dgoss changes, so it'll be on the github "releases" tab in the next release.

See: https://github.com/aelsabbahy/goss/tree/master/extras/dgoss#goss_files_strategy