nix-config

NixOS and Home-Manager configuration.

Assumes use of Nix flakes.

Adding a new host

The steps refer to this new hosts as "example", rename as you see fit.

cd <parent-dir>/nix-config
mkdir hosts/example
nix-shell -p nixos-install-tools
nixos-generate-config --dir hosts/example

Update NixOS Configuration

Build:

nixos-rebuild build --flake .#<hostname>

Switch (usually requires sudo):

nixos-rebuild switch --flake .#<hostname>

Update Home-Manager Configuration

Use this for non-NixOS machines

Build:

home-manager build --flake .#<username>@<hostname>

Switch:

home-manager switch --flake .#<username>@<hostname>

Update flake.lock file

nix flake update

New Proxmox VM setup

These insructions are based on the NixOS which page Proxmox Virtual Environment

Create a new configuration for the machine
Ensure to change the user password hash

Generate the machine image using nixos-generators by running

nix run github:nix-community/nixos-generators -- --format proxmox --configuration hosts/media/configuration.nix

Upload the image to the Proxmox host

Restore the image as a running VM

qmrestore /var/lib/vz/dump/vzdump-qemu-nixos-21.11.git.d41882c7b98M.vma.zst <vmid> --unique true

root@proxmox-server:~# qm start <vmid>
root@proxmox-server:~# qm terminal <vmid>

Resources

Garbage Collection

nix run --extra-experimental-features nix-command --extra-experimental-features flakes --no-write-lock-file github:nix-community/home-manager/ -- --flake ".#$USER@$HOSTNAME" --extra-experimental-features nix-command --extra-experimental-features flakes switch -b backup