Fix: Guest API would crash due to FileNotFound

The parent directory on which the Guest APi listens did not exist in some context (probably Firecracker based instances), which crashed the process.

This ensures that the directories exist and that the Unix socket can therefore be created.

src/aleph/vm/controllers/firecracker/executable.py

@@ -296,8 +296,12 @@ async def load_configuration(self):
  return
 
  async def start_guest_api(self):
- logger.debug(f"starting guest API for {self.vm_id}")
- vsock_path = f"{self.fvm.vsock_path}_53"
+ vsock_path = Path(f"{self.fvm.vsock_path}_53")
+
+ # Ensure that the directory where the VSOCK socket will be created exists
+ vsock_path.parent.mkdir(parents=True, exist_ok=True)
+ logger.debug(f"starting guest API for {self.vm_id} on {vsock_path}")
+
  vm_hash = self.vm_hash
  self.guest_api_process = Process(
  target=run_guest_api,