59 lines
1.9 KiB
Markdown
59 lines
1.9 KiB
Markdown
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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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