86 lines
2.3 KiB
Nix
86 lines
2.3 KiB
Nix
# vm.nix
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let
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pkgs = import <nixpkgs> {};
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in
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let
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# 1. SOURCE YOUR DEBIAN IMAGE
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debianImage = pkgs.fetchurl {
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name = "debian-13-genericcloud-amd64.qcow2";
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url = "https://cloud.debian.org/images/cloud/trixie/latest/debian-13-genericcloud-amd64.qcow2";
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hash = "sha256-V9a6DUghJB5j4Vz9Y5aikZ8syhx5Zn2593m8/8xNwIU="; # REPLACE THIS
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};
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# 2. VM DATA DIRECTORY
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vmDataDir = "/home/${builtins.getEnv "USER"}/.local/share/debian-vm";
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# 3. CREATE ALL FILES IN A SCRIPT
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setupScript = pkgs.writeShellScriptBin "setup-vm-files" ''
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set -e
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# Create VM directory
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mkdir -p "${vmDataDir}"
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# Create persistent disk if it doesn't exist
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if [ ! -f "${vmDataDir}/debian-persistent.qcow2" ]; then
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echo "Creating persistent disk from base image..."
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${pkgs.qemu}/bin/qemu-img create -f qcow2 \
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-b "${debianImage}" \
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-F qcow2 \
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"${vmDataDir}/debian-persistent.qcow2" \
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20G
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fi
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# Create cloud-init configuration
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cat > "${vmDataDir}/user-data" << 'EOF'
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#cloud-config
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password: nixos
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chpasswd: { expire: False }
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ssh_pwauth: True
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runcmd:
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- |
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if [ ! -f /etc/vm-initialized ]; then
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cd /home/debian
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sudo -u debian git clone https://github.com/someone/something
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cd something
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chmod +x install.sh
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sudo -u debian ./install.sh
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touch /etc/vm-initialized
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fi
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EOF
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# Create cloud-init ISO
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${pkgs.cloud-utils}/bin/cloud-localds \
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"${vmDataDir}/cloud-init.iso" \
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"${vmDataDir}/user-data"
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echo "VM files created in ${vmDataDir}"
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'';
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# 4. LAUNCH SCRIPT
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runScript = pkgs.writeShellScriptBin "run-debian-vm" ''
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set -e
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# Run setup first
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${setupScript}/bin/setup-vm-files
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# Launch QEMU with KVM acceleration
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${pkgs.qemu_kvm}/bin/qemu-kvm \
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-name "Debian-Persistent-VM" \
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-machine accel=kvm \
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-cpu host \
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-m 2048 \
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-drive file="${vmDataDir}/debian-persistent.qcow2",format=qcow2,if=virtio \
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-drive file="${vmDataDir}/cloud-init.iso",format=raw,if=virtio \
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-netdev user,id=n1,hostfwd=tcp::2222-:22 \
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-device virtio-net-pci,netdev=n1 \
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-display gtk \
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-vga virtio \
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"$@"
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'';
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in
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{
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system.build.customVM = runScript;
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}
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