this post was submitted on 23 Jul 2023
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Where can I learn Docker fundamentals? (lemm.ee)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/selfhosted
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I jumped into Docker feet first a few months ago and have not had a real good time with it. Networking doesn't make sense, I can't ever seem to access config files without dropping to su -, all the tutorials and videos I find are pretty top level and assume the user already has a firm grasp on it. It's great for drop in stuff like open speed test and Vaultwarden but I recently tried setting up dashy and I can't even find the config files to edit. The Dashy documentation says the easiest way to edit the configs is to use code-server, so I spun up a code-server VM and can't even get it to open the files because the web based VSC doesn't allow for SSH editing. There's nothing explained in the documentation beyond that.

Yes I'm frustrated but I'm not bitching as if these solutions are trash, I'm simply asking where can I go to learn this shit from the ground up? It doesn't make any sense to me from the perspective that I've approached it. Networking seems to be silly and weird, entering an interactive TTY to the container seems to be useless as there's no package manager and doesn't seem to have vim, nano, or any native way to edit configs. It's been extremely frustrating so I ask you, where can I learn what I'm doing wrong and how to properly work with Docker?

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[–] [email protected] 14 points 1 year ago (1 children)

"like mini lightweight VMs"

That's exactly how I've approached it cause that's exactly how it was explained. But it's not at all like that. Thanks for your explanation.

[–] flubba86 9 points 1 year ago (1 children)

Same, that's how it was explained to me too. It spent over a year learning docker the wrong way, and trying to use it as a replacement for VMs, after a coworker told me that.

[–] [email protected] 5 points 1 year ago (1 children)

Heh I remember searching for an hour about how to see the GUI of a docker container when I was first getting into it. Didn't help that I was using windows to run docker, either, it's a whole other layer of abstraction.

[–] flubba86 1 points 1 year ago

Yeah, I had the benefit that I was a Linux sysadmin, and have been using Linux for work and at home for the last 15 years. So I was lucky I didn't have to deal with the nightmare that is Docker on Windows, while I was learning Docker.

Since then I have had to provide basic docker training to new developers, most use windows, I have had to deal with docker on windows plenty, it does ramp the learning curve, so I know your pain.