Explain Like I'm Five

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ELI5: Docker containers (feddit.org)

submitted 1 week ago by [email protected] to c/[email protected]

21 comments fedilink hide all child comments

I can't seem to wrap my head around (Docker) containers and especially their maintenance.
As I understand it, containers contain a stripped-down OS that shares some resources with the host?
Or is it more like a closed-off part of the file system?

Anyway, when I have several containers running on a host system,
Do I need to keep them all updated separately? If so, how?
Or is it enough to update the host system, and not worry about the containers?

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[–] [email protected] 2 points 23 hours ago (1 children)

You would run “docker build” to create your image. Maybe around the top of your source tree. That would have a step which copies your code into a directory which will be part of the built image.

Though as another reply mentions, for dev purposes (probably not for production) you could create a mount point / volume which mounts the source dir from your host inside of the container. This will allow you to make changes to your source code on your host without having to re-run “docker build” every time.

[–] clay_pidgin 1 points 11 hours ago

That sounds helpful, I'll give it a try. Thank you, friend.