Launch SICA VM as a systemd service

modules/virtualization.nix

@@ -8,4 +8,19 @@
     onShutdown = "shutdown";
     qemuPackage = pkgs.qemu_kvm;
   };
+
+  # Declarative configuration of the VMs
+  systemd.services.sica = {
+    description = "SICA database";
+    wantedBy = [ "default.target" ];
+    script = ''
+      disk=/vault/VMs/sica.qcow2
+      sock=/run/qemu-sica.mon.sock
+      ${pkgs.qemu_kvm}/bin/qemu-kvm -m 1G -nic user,hostfwd=tcp::2222-:22 -hda $disk -monitor unix:$sock,server,nowait -nographic
+    '';
+    preStop = ''
+      echo 'system_powerdown' | ${pkgs.socat}/bin/socat - UNIX-CONNECT:/run/qemu-sica.mon.sock
+      sleep 10
+    '';
+  };
 }