Fix: Failing to restart nddpd caused the exception to escalate

The `ndppd` service is not always required and restarting it can fail.

While waiting for a better fix that prevents restarting the service too quickly, this logs an error instead of raising an exception.

src/aleph/vm/network/ndp_proxy.py

@@ -14,6 +14,7 @@
 from dataclasses import dataclass
 from ipaddress import IPv6Network
 from pathlib import Path
+from subprocess import CalledProcessError
 
 from aleph.vm.utils import run_in_subprocess
 
@@ -33,7 +34,11 @@ def __init__(self, host_network_interface: str):
  @staticmethod
  async def _restart_ndppd():
  logger.debug("Restarting ndppd")
- await run_in_subprocess(["systemctl", "restart", "ndppd"])
+ try:
+ await run_in_subprocess(["systemctl", "restart", "ndppd"])
+ except CalledProcessError as error:
+ logger.error("Failed to restart ndppd: %s", error)
+ # We do not raise the error here, since this should not crash the entire system
 
  async def _update_ndppd_conf(self):
  config = f"proxy {self.host_network_interface} {{\n"