nix-bitcoin/examples/qemu-vm/minimal-vm.nix

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nix-bitcoin: pkgs: system:
rec {
inherit (nix-bitcoin.inputs) nixpkgs;
mkVMScript = vm: pkgs.writers.writeBash "run-vm" ''
set -euo pipefail
export TMPDIR=$(mktemp -d /tmp/nix-bitcoin-vm.XXX)
trap 'rm -rf $TMPDIR' EXIT
export NIX_DISK_IMAGE=$TMPDIR/nixos.qcow2
# shellcheck disable=SC2211
QEMU_OPTS="-smp $(nproc) -m 1500" ${vm}/bin/run-*-vm
'';
vm = (import (nixpkgs + "/nixos") {
inherit system;
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configuration = { config, lib, modulesPath, ... }: {
imports = [
nix-bitcoin.nixosModules.default
(nix-bitcoin + "/modules/presets/secure-node.nix")
(modulesPath + "/virtualisation/qemu-vm.nix")
];
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virtualisation.graphics = false;
nix-bitcoin.generateSecrets = true;
services.clightning.enable = true;
# For faster startup in offline VMs
services.clightning.extraConfig = "disable-dns";
# Avoid lengthy build of the nixos manual
documentation.nixos.enable = false;
nixpkgs.pkgs = pkgs;
services.getty.autologinUser = "root";
nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
services.getty.helpLine = lib.mkAfter ''
Welcome to nix-bitcoin!
To explore running services, try the following commands:
- nodeinfo
- systemctl status bitcoind
- systemctl status clightning
- lightning-cli getinfo
'';
# Power off VM when the user exits the shell
systemd.services."serial-getty@".preStop = ''
echo o >/proc/sysrq-trigger
'';
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system.stateVersion = lib.mkDefault config.system.nixos.release;
};
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}).config.system.build.vm;
runVM = mkVMScript vm;
}