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Should I move to Docker? (lemmy.ca)

submitted 11 months ago by [email protected] to c/[email protected]

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I'm a retired Unix admin. It was my job from the early '90s until the mid '10s. I've kept somewhat current ever since by running various machines at home. So far I've managed to avoid using Docker at home even though I have a decent understanding of how it works - I stopped being a sysadmin in the mid '10s, I still worked for a technology company and did plenty of "interesting" reading and training.

It seems that more and more stuff that I want to run at home is being delivered as Docker-first and I have to really go out of my way to find a non-Docker install.

I'm thinking it's no longer a fad and I should invest some time getting comfortable with it?

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[–] [email protected] 2 points 11 months ago (1 children)

VMs have a ton of overhead compared to Docker. VMs replicate everything in the computer while Docker just uses the host for everything, except it sandboxes the apps.

In theory, VMs are far more secure since they're almost entirely isolated from the host system (assuming you don't have any of the host's filesystems attached), they are also OS agnostic whereas Docker is limited to the OS it runs on.

[–] [email protected] 1 points 11 months ago (1 children)

Ah ok thanks, the security-aspect is indeed important to me. So I shouldn't really use it for critical things. Especially those with external access.

[–] [email protected] 1 points 10 months ago

Docker is still secure, it's just less secure than Virtualization. It's like a standard door knob lock (the twist/push button kind) vs a deadbolt. Both will keep 90% of bad-actors out but those who really want to get in can based on how high the security is.