Default to --dry-run? about docker-cleanup-volumes

[13rac1]

BTW I may have time to implement, but want your thoughts on the matter first.

[Ian-T-Price]

1. Thanks for this script - most useful

2. Absolutely this should be run as --dryrun by default, which is the first thing I did as we run in a multi-user environment.

This is my version. It adds an --action parameter replacing --dryrun and a --help parameter

Also there's a couple of text clean-ups and enhancements.

If you like I'll pull the code add this in and update the README.md as well.

Enjoy

docker_cleanup_vols.sh.txt

[ryneeverett]

+1

[chadoe]

Sorry but I'm not going to change the default behavior. Too many systems already depend on it to just run as is. Besides that I don't think dry-run should be the default action. It would be like rm file would require an additional parameter to actually delete a file or docker rm container to require an additional parameter to delete a container.
Also the script is pretty much obsolete since Docker has built-in volume management since version 1.9.