Currently, I run Unraid and have all of my services’ setup there as docker containers. While this is nice and easy to setup initially, it has some major downsides:
- It’s fragile. Unraid is prone to bugs/crashes with docker that take down my containers. It’s also not resilient so when things break I have to log in and fiddle.
- It’s mutable. I can’t use any infrastructure-as-code tools like terraform, and configuration sort of just exist in the UI. I can’t really roll back or recover easily.
- It’s single-node. Everything is tied to my one big server that runs the NAS, but I’d rather have the NAS as a separate fairly low-power appliance and then have a separate machine to handle things like VMs and containers.
So I’m looking ahead and thinking about what the next iteration of my homelab will look like. While I like unraid for the storage stuff, I’m a little tired of wrangling it into a container orchestrator and hypervisor, and I think this year I’ll split that job out to a dedicated machine. I’m comfortable with, and in fact prefer, IaC over fancy UIs and so would love to be able to use terraform or Pulumi or something like that. I would prefer something multi-node, as I want to be able to tie multiple machines together. And I want something that is fault-tolerant, as I host services for friends and family that currently require a lot of manual intervention to fix when they go down.
So the question is: how do you all do this? Kubernetes, docker-compose, Hashicorp Nomad? Do you run k3s, Harvester, or what? I’d love to get an idea of what people are doing and why, so I can get some ideas as to what I might do.
Could you give a quick example of using NixOS configuration to launch a machine or deploying something remotely? I’m just starting to move beyond a single machine at home. I’d really like to get transition to infra as code.
I recommend starting with ZeroToNix’s docs and then moving on to nixos.wiki, but here is a minimal, working example that I could deploy to a hetzner VPS that only has nix and ssh installed:
{ config, pkgs, ... }: { # generated, this will set up partitions and bootloader in a separate file imports = [ ./hardware-configuration.nix ]; zramSwap.enable = true; networking.hostName = "miki"; # configures SSH daemon with a public key so we can ssh in again services.openssh.enable = true; users.users.root.openssh.authorizedKeys.keys = [ ''ssh-ed25519 AAAAC3NzaC1lNDI1NTE5AAAAIPJ7FM3wEuWoVuxRkWnh9PNEtG+HOcwcZIt6Qg/Y1jka'' ]; # creates a timmy user with sudo access and wget installed users.users.timmy = { isNormalUser = true; extraGroups = [ "networkmanager" "wheel" "sudo" ]; packages = with pkgs; [ wget ]; }; # open up SSH port networking.firewall.allowedTCPPorts = [ 22 ]; # start nginx, assumes HTML is present at `/var/www` services.nginx = { enable = true; virtualHosts."default" = { forceSSL = true; # Redirect HTTP clients to an HTTPs connection default = true; # Always use this host, no matter the host name root = /var/www; # Set the web root to ser }; }; system.stateVersion = "22.11"; }This sets up a machine, configures the usual stuff like the ssh daemon, creates a user, and sets up an nginx server. To deploy it you would run
nixos-rebuild --target-host root@10.0.0.1 switch. Other tools exist (I use colmena but the idea is the same). Note how easy it was to set up nginx! If I was setting Nomad up, I would just doservices.nomad.enable = true.As you can see some things you will have to learn (the nix language, what the configs are…) but I think it is worth it.
This is such a wealth of information, thank you! I’m really excited to try this out.
This is awesome, ZeroToNix is exactly what I was looking for. I’ve been interested in trying NixOS for a while but I always found the documentation obtuse (extensive, which is great, but not super beginner friendly). I’ll give it a try!
Good luck on your Nix journey! Happy to help if you have questions.
Of all the tech I use, I think Nix is the most ‘avant-garde’ in that it is super different from the usual methods (scripting, stateful things), but works very well once past the paradigm shift and the learning curve that entails.