119 lines
3.0 KiB
Markdown
119 lines
3.0 KiB
Markdown
# 0x29a nixos config
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My personal nixos configuration files.
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## basic system installation
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- The installations in this repository are always luks encrypted
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- For simplicity I'm using device labels rather than uuids
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1. the partitioning layout should look somewhat like this after the installation
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```bash
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
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nvme0n1 259:0 0 476.9G 0 disk
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├─nvme0n1p1 259:1 0 2G 0 part /boot
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└─nvme0n1p2 259:2 0 474.9G 0 part
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└─cryptroot 254:0 0 474.9G 0 crypt
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├─lvmroot-swap 254:1 0 20G 0 lvm [SWAP]
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├─lvmroot-home 254:2 0 250G 0 lvm /home
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└─lvmroot-root 254:3 0 204.9G 0 lvm /nix/store
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```
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2. prepare the installation
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```bash
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# format the boot partition
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mkfs.fat -F 32 /dev/sda1 -n "nixboot"
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# create an encrypted partition
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cryptsetup luksFormat -y --label="nixcrypt" /dev/sda2
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# open the encrypted partition and map it to /dev/mapper/cryptroot
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cryptsetup luksOpen /dev/sda2 cryptroot
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# create the physical volume
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pvcreate /dev/mapper/cryptroot
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# create a volume group inside
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vgcreate lvmroot /dev/mapper/cryptroot
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# create the swap volume
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lvcreate --size 8G lvmroot --name nwap
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# if you desire, create a home volume
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lvcreate --size 150G lvmroot --name home
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# create the root volume
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lvcreate -l 100%FREE lvmroot --name root
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# format as usual for root partition
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mkfs.ext4 -L "nixroot" /dev/mapper/lvmroot-root
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# if you previously made the home partition, do it too
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mkfs.ext4 -L "nixhome" /dev/mapper/lvmroot-home
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# format the swap partition
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mkswap -L "nixswap" /dev/mapper/lvmroot-swap
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# mount root
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mount /dev/disk/by-label/nixroot /mnt
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# mount boot
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mount --mkdir /dev/sda1 /mnt/boot
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# again, if you did the home volume
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mount --mkdir /dev/disk/by-label/nixhome /mnt/home
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# turn on swap
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swapon /dev/disk/by-label/nixswap
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```
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3. prepare nixos
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```bash
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# generate templates and update the hardware-configuration.nix
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sudo nixos-generate-config --root /mnt
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# add cryptd to the kernelModules
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boot.initrd.kernelModules = [ "dm-snapshot" "cryptd" ];
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# add file systems using labels
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fileSystems."/" =
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{ device = "/dev/disk/by-label/nixroot";
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fsType = "ext4";
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};
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fileSystems."/boot" =
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{ device = "/dev/disk/by-label/nixboot";
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fsType = "vfat";
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options = [ "fmask=0022" "dmask=0022" ];
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};
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fileSystems."/home" =
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{ device = "/dev/disk/by-label/nixhome";
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fsType = "ext4";
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};
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swapDevices =
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[ { device = "/dev/disk/by-label/nixswap"; }
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];
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# point the bootloader to the luks device
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boot.initrd.luks.devices."cryptroot".device = "/dev/disk/by-label/nixcrypt";
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```
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4. install nixos
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```bash
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cd /mnt
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sudo nixos-install
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```
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## how to deploy the inital config
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- Don't forget to install the bootloader, if you changed it since `nixos-install`
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```bash
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$ sudo nixos-rebuild --install-bootloader switch --flake .#host_name
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```
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## how to upgrade the system
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```bash
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$ cd /path/to/repo
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$ sudo nix flake update
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$ sudo nixos-rebuild switch --flake .#host_name
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```
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## author
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aaron <aaron@0x29a.ch>
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