I never understood how to use Docker, what makes it so special? I would really like to use it on my Rapsberry Pi 3 Model B+ to ease the setup process of selfhosting different things.
I’m currently running these things without Docker:
- Mumble server with a Discord bridge and a music bot
- Maubot, a plugin-based Matrix bot
- FTP server
- Two Discord Music bots
All of these things are running as systemd services in the background. Should I change this? A lot of the things I’m hosting offer Docker images.
It would also be great if someone could give me a quick-start guide for Docker. Thanks in advance!
While you are technically right there is very little logical difference between containers and VMs. Really the only fundamental difference is that containers use the same kernel while VMs run their own. (let’s not even worry about para-virtualization right now).
In practice I would say the biggest difference is that there is better memory sharing so total memory usage will often be less. But honestly this mostly comes down to the fact that the average container bundles less software than the average VM image. Easier management of volumes is also nice because typically you will just bind-mount a host directory, but it also isn’t hard to mount a block device on a Linux host.