Question Docker 101: Changing image versions

[Telos]

Most of the Docker images I use are from the "latest" category. If I wanted to test the "beta" image, or a specific release, a new container is created.

Being lazy, I don't want to re-enter my paths, environmental variables, etc.

What's the best way to do this? Poking around Synology's Docker GUI I'm guessing I could export the settings from the "latest" container, and then import those settings into the "beta" container. Would that work?

Or would I simply stop the "lastest" container... and rename it from "something" to "something-latest-save"... and then rename the "beta" container from "something-beta" to "something"? If I did that would the new "something" container inherit the settings from the original "something" container?

I hope I've made this clear. Basically I'd like to try out a beta (or develop) image, with the ability to revert to the lasted image... with the minimum of fuss and effort.

 

[fredbert]

I tested this out recently for a response at the dark side.

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Basically, download the image you want (and make sure you volume data is on NAS folders):

1. Export the config
2. Edit the config and change the image from ':latest' to something else.
3. Create a new container by importing the config.

 

[Telos]

Thanks. I was concerned about wrecking a working container. This looks good.