vm.run: new 'drives' option

README.rst

@@ -730,6 +730,9 @@ vm
 dist
     VM image to use inside the `vm` folder.
 
+drives
+    Extra drives. Each line is passed with -drive
+
 commands
     List of <command> options, each one being a shell script to execute via
     SSH. They are processed in sequence. This is usually only required if you

slapos/recipe/vm.py

@@ -122,12 +122,15 @@ class BaseRecipe(EnvironMixin):
     except KeyError:
       if mem is None:
         raise
-    return ['qemu-system-' + ARCH, '-enable-kvm', '-drive', drive,
+    args = ['qemu-system-' + ARCH, '-enable-kvm', '-drive', drive,
             '-smp', self.options.get('smp', '1'), '-m', str(mem),
             '-net', 'nic,model=virtio', '-net', net,
             # https://daniel-lange.com/archives/152-hello-buster.html
             '-object', 'rng-random,filename=/dev/urandom,id=rng0',
             '-device', 'virtio-rng-pci,rng=rng0']
+    for drive in self.options.get('drives', '').splitlines():
+        args += '-drive', drive
+    return args
 
   @property
   def ssh_key(self):