initial commit
This commit is contained in:
WanderingPenwing
commit
89245d496a
1
.gitignore
vendored
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1
.gitignore
vendored
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result
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58
README.md
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58
README.md
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# Building a NixOS SD image for a Raspberry Pi Zero 2 w
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## 1. Update `zero2w.nix`
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In particular, don't forget:
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- to configure your wifi
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- to add an admin user able to connect through ssh
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## 2. Build the image
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#### - On arm processor
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```sh
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nix build -L .#nixosConfigurations.zero2w.config.system.build.sdImage
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```
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#### - On x86 processor :
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add this to your config :
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```nix
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boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
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```
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and then run :
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```sh
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nix build -L .#nixosConfigurations.zero2w.config.system.build.sdImage --system aarch64-linux
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```
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## 3. Copy the image in your sd card
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```sh
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DEVICE=/dev/disk5 # Whatever your sd card reader is
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sudo dd if=result/sd-image/zero2.img of=$DEVICE bs=1M conv=fsync status=progress
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```
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## 4. Boot your Zero
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## 5. From another machine, rebuild the system:
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```sh
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ZERO2_IP=<the-zero2-ip>
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SSH_USER=<the-admin-user-in-the-pi>
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nix run github:serokell/deploy-rs .#zero2w -- --ssh-user $SSH_USER --hostname $ZERO2_IP
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```
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## Notes
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- The Zero 2 doesn't have enough RAM to build itself. An initial lead was to create a swap partition, but it turns out it was a bad idea, as it would have decreased the sd card lifetime (sd cards don't like many write operations). A `zram` swap is not big enough to work. Hence the use of `deploy-rs`.
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- Note that `nixos-rebuild --target-host` would work instead of using `deploy-rs`. but as `nixos-rebuild` is not available on Darwin, I'm using `deploy-rs` that works both on NixOS and Darwin.
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- I still couldn't find a way to use `boot.kernelPackages = pkgs.linuxKernel.packages.linux_rpi3`.
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- the `sdImage.extraFirmwareConfig` option is not ideal as it cannot update `config.txt` after it is created in the sd image.
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## See also
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- [this issue](https://github.com/NixOS/nixpkgs/issues/216886)
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- [this gist](https://gist.github.com/plmercereau/0c8e6ed376dc77617a7231af319e3d29)
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---
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# mine
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update
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```sh
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nix run github:serokell/deploy-rs .#zero2w -- --ssh-user penwing --hostname 192.168.1.33
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```
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95
flake.lock
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95
flake.lock
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{
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"nodes": {
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"deploy-rs": {
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"inputs": {
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"flake-compat": "flake-compat",
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"nixpkgs": "nixpkgs",
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"utils": "utils"
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},
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"locked": {
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"lastModified": 1698921442,
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"narHash": "sha256-7KmvhQ7FuXlT/wG4zjTssap6maVqeAMBdtel+VjClSM=",
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"owner": "serokell",
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"repo": "deploy-rs",
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"rev": "660180bbbeae7d60dad5a92b30858306945fd427",
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"type": "github"
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},
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"original": {
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"owner": "serokell",
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"repo": "deploy-rs",
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"type": "github"
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}
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},
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"flake-compat": {
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"flake": false,
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"locked": {
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"lastModified": 1668681692,
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"narHash": "sha256-Ht91NGdewz8IQLtWZ9LCeNXMSXHUss+9COoqu6JLmXU=",
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"owner": "edolstra",
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"repo": "flake-compat",
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"rev": "009399224d5e398d03b22badca40a37ac85412a1",
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"type": "github"
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},
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"original": {
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"owner": "edolstra",
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"repo": "flake-compat",
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"type": "github"
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}
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},
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"nixpkgs": {
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"locked": {
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"lastModified": 1671417167,
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"narHash": "sha256-JkHam6WQOwZN1t2C2sbp1TqMv3TVRjzrdoejqfefwrM=",
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"owner": "NixOS",
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"repo": "nixpkgs",
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"rev": "bb31220cca6d044baa6dc2715b07497a2a7c4bc7",
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"type": "github"
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},
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"original": {
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"owner": "NixOS",
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"ref": "nixpkgs-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"nixpkgs_2": {
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"locked": {
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"lastModified": 1699099776,
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"narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
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"type": "github"
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},
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"original": {
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"owner": "nixos",
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"ref": "nixos-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"root": {
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"inputs": {
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"deploy-rs": "deploy-rs",
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"nixpkgs": "nixpkgs_2"
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}
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},
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"utils": {
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"locked": {
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"lastModified": 1667395993,
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"narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
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"owner": "numtide",
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"repo": "flake-utils",
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"rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
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"type": "github"
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},
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"original": {
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"owner": "numtide",
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"repo": "flake-utils",
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"type": "github"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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34
flake.nix
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34
flake.nix
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{
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description = "Flake for building a Raspberry Pi Zero 2 SD image";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
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deploy-rs.url = "github:serokell/deploy-rs";
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};
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outputs = {
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self,
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nixpkgs,
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deploy-rs,
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}: rec {
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nixosConfigurations = {
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zero2w = nixpkgs.lib.nixosSystem {
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modules = [
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"${nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64.nix"
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./zero2w.nix
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];
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};
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};
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deploy = {
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user = "root";
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nodes = {
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zero2w = {
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hostname = "zero2w";
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profiles.system.path =
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deploy-rs.lib.aarch64-linux.activate.nixos self.nixosConfigurations.zero2w;
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};
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};
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};
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};
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}
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40
sd-image.nix
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40
sd-image.nix
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# This module extends the official sd-image.nix with the following:
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# - ability to add options to the config.txt firmware
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{
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config,
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lib,
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pkgs,
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...
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}: {
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options.sdImage = with lib; {
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extraFirmwareConfig = mkOption {
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type = types.attrs;
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default = {};
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description = lib.mdDoc ''
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Extra configuration to be added to config.txt.
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'';
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};
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};
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config = {
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sdImage.populateFirmwareCommands =
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lib.mkIf ((lib.length (lib.attrValues config.sdImage.extraFirmwareConfig)) > 0)
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(
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let
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# Convert the set into a string of lines of "key=value" pairs.
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keyValueMap = name: value: name + "=" + toString value;
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keyValueList = lib.mapAttrsToList keyValueMap config.sdImage.extraFirmwareConfig;
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extraFirmwareConfigString = lib.concatStringsSep "\n" keyValueList;
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in
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lib.mkAfter
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''
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config=firmware/config.txt
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# The initial file has just been created without write permissions. Add them to be able to append the file.
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chmod u+w $config
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echo "\n# Extra configuration" >> $config
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echo "${extraFirmwareConfigString}" >> $config
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chmod u-w $config
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''
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);
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};
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}
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108
zero2w.nix
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108
zero2w.nix
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{
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lib,
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modulesPath,
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pkgs,
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...
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}: {
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imports = [
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./sd-image.nix
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];
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nixpkgs.hostPlatform = "aarch64-linux";
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# ! Need a trusted user for deploy-rs.
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nix.settings.trusted-users = ["@wheel"];
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system.stateVersion = "23.11";
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zramSwap = {
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enable = true;
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algorithm = "zstd";
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};
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sdImage = {
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# bzip2 compression takes loads of time with emulation, skip it. Enable this if you're low on space.
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compressImage = false;
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imageName = "zero2.img";
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extraFirmwareConfig = {
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# Give up VRAM for more Free System Memory
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# - Disable camera which automatically reserves 128MB VRAM
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start_x = 0;
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# - Reduce allocation of VRAM to 16MB minimum for non-rotated (32MB for rotated)
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gpu_mem = 16;
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# Configure display to 800x600 so it fits on most screens
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# * See: https://elinux.org/RPi_Configuration
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hdmi_group = 2;
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hdmi_mode = 8;
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};
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};
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# Keep this to make sure wifi works
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hardware.enableRedistributableFirmware = lib.mkForce false;
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hardware.firmware = [pkgs.raspberrypiWirelessFirmware];
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boot = {
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# TODO doesn't work
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# kernelPackages = pkgs.linuxKernel.packages.linux_rpi3;
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initrd.availableKernelModules = ["xhci_pci" "usbhid" "usb_storage"];
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loader = {
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grub.enable = false;
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generic-extlinux-compatible.enable = true;
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};
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# Avoids warning: mdadm: Neither MAILADDR nor PROGRAM has been set. This will cause the `mdmon` service to crash.
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# See: https://github.com/NixOS/nixpkgs/issues/254807
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swraid.enable = lib.mkForce false;
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};
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networking = {
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interfaces."wlan0".useDHCP = true;
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wireless = {
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enable = true;
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interfaces = ["wlan0"];
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# ! Change the following to connect to your own network
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networks = {
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"Le Ninternet" = {
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psk = "XcTsS9mnz2ePwE7dps";
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};
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};
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};
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};
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# Enable OpenSSH out of the box.
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services.sshd.enable = true;
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# NTP time sync.
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services.timesyncd.enable = true;
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# ! Change the following configuration
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users.users.penwing = {
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isNormalUser = true;
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home = "/home/penwing";
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description = "Me";
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extraGroups = ["wheel" "networkmanager"];
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# ! Be sure to put your own public key here
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openssh.authorizedKeys.keys = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN/SQbXjL6O2zjKFdybiMLu7Imc10IGrTMUnRtIxf0jJ nicolas.pinson31@gmail.com"];
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};
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security.sudo = {
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enable = true;
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wheelNeedsPassword = false;
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};
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nixpkgs.config.allowUnfree = true;
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environment.systemPackages = (with pkgs; [
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# CLIs
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starship # shell more pretty
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git # code versioning
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bottom # task manager
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micro # text editor
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fastfetch
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yazi
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]);
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# ! Be sure to change the autologinUser.
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services.getty.autologinUser = "penwing";
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}
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