this post was submitted on 03 Nov 2026
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Privacy
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Running apps directly on Linux is like cooking in a shared kitchen where everyone shares the same spice rack. If one app needs an updated spice that breaks the recipe, your whole kitchen suffers.
Docker is like giving every app its own private kitchen pod with all its exact ingredients pre-packaged inside. Nothing leaks out, nothing interferes with the rest of your system, and if an app breaks, you just throw the whole pod away and start fresh without touching your main computer.
Once you get used to docker, you can stand up 20 apps in a night with standard configs and it all just works.
Later on, if you start really homelabbing it, you can stand up 3 small computers and cluster them to keep a copy of each container you're using up. If one of the boxes go down, they just shuffle and start the container on other nodes.
Agreed on all of this. I run docker on one of my PCs and have multiple containers running. But I didn't know you can cluster multiple PCs to run a copy of the containers and I was just wondering about a week ago if that's possible. Would you have a resource on how to set up a 2nd PC to do this and cluster with my server?
You need docker swarm for that, it's pretty easy to setup and it works as an extension to docker.
If you selfhist eg. DNS, or another static app that you want highly available but from a single IP, you can use keepalived directly on the host and this allows you to have two machines that share a third virtual IP, and if server A fails, the IP moves automatically to Server B and you don't even notice that the server failed, because everything failed over to the other server.
Awesome, I will be looking into setting this up tonight. Thanks for the info.