Luna's NixOS Home Infrastructure

Work-in-progress NixOS Server Infrastructure based on valerie's NixOS setup.

Setup

Setting up Sops

TODO.

Bootstrapping a New Device

1. First, boot the NixOS live environment (minimal ISO is recommended).

2. Then, get the harddrive ID using lsblk or fdisk -l:

   sudo fdisk -l
   ls -lah /dev/disk/by-id | grep -i <drive disk ID ie. sda>
   

   Example output:

   [nix-shell:~]$ sudo fdisk -l
   Disk /dev/loop0: 1.14 GiB, 1221455872 bytes, 2385656 sectors
   Units: sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   
   
   Disk /dev/sda: 256 GiB, 274877906944 bytes, 536870912 sectors
   Disk model: QEMU HARDDISK
   Units: sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   
   [nix-shell:~]$ ls -lah /dev/disk/by-id | grep -i sda
   lrwxrwxrwx 1 root root   9 May  5 13:20 scsi-0QEMU_QEMU_HARDDISK_drive-scsi0 -> ../../sda
   
   [nix-shell:~]$ # disk path: /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0
   

3. Manually create a host configuration by modifying/duplicating hosts/<target_host_to_base_off_of> to hosts/<new_host_name>. Be sure to modify the hostname in hosts/<new_host_name>/configuration.nix.

4. Add the host to flake.nix.

5. Modify the disko configuration for our host to use the correct disk ID that we found earlier.

6. Make any other additional modifications if needed.

Installing the Configuration

1. Copy/clone the configuration over to the host to install and cd into it.
2. Copy the sops key data to the host you are installing on (sops key.txt and ssh_host_ed25519_key to /var/lib/sops-nix/)
3. Run sudo nix --experimental-features "nix-command flakes" run github:nix-community/disko/latest -- --mode destroy,format,mount -f "$PWD#hostname" to prepare the disk, replacing hostname with the host you want to install (ex. andromeda).
4. Before installing, prepare sops inside the mounted filesystem: sudo mkdir -p /mnt/persist/var/lib/sops-nix/; sudo cp -r /var/lib/sops-nix/ /mnt/persist/var/lib/; sudo chmod -R 755 /mnt/persist/var/lib/sops-nix/
5. Run sudo nixos-install --flake "$PWD#hostname" to install the OS, replacing hostname with the host you want to install (ex. andromeda).
6. Copy the current configuration into /etc/nixos: sudo cp -r $PWD/. /mnt/persist/etc/nixos