Fixes after consul-setup that work with existing integration tests

• Fixes scraping consul's metrics
• Hardens log scraping against broken configs
• Use IP & MAC from container to forward statistics to

tangostationcontrol/tangostationcontrol/common/net.py

 # Copyright (C) 2024 ASTRON (Netherlands Institute for Radio Astronomy)
 # SPDX-License-Identifier: Apache-2.0
 
-import netifaces
+import psutil
+from ipaddress import IPv4Address
+from socket import AddressFamily
+
+__all__ = ["get_mac", "get_ip"]
+
+
+def _get_interface_addresses(interface: str) -> list:
+    try:
+        return psutil.net_if_addrs()[interface]
+    except KeyError as e:
+        raise ValueError(f"Cannot find interface {interface}") from e
 
 
 def get_mac(interface: str) -> str:
     """Returns the MAC address of the given interface (f.e. 'eth0')."""
 
-    try:
-        addresses = netifaces.ifaddresses(interface)
-        return addresses[netifaces.AF_LINK][0]["addr"]
-    except (ValueError, IndexError, KeyError) as e:
-        raise ValueError(
-            f"Could not obtain MAC address of interface {interface}"
-        ) from e
+    for address in _get_interface_addresses(interface):
+        if address.family == AddressFamily.AF_PACKET:
+            return address.address
 
+    raise ValueError(f"Cannot obtain MAC address of interface {interface}")
 
-def get_ip(interface: str) -> str:
-    """Returns the IP address of the given interface (f.e. 'eth0')."""
 
-    try:
-        addresses = netifaces.ifaddresses(interface)
-        return addresses[netifaces.AF_INET][0]["addr"]
-    except (ValueError, IndexError, KeyError) as e:
-        raise ValueError(f"Could not obtain IP address of interface {interface}") from e
+def get_ip(interface: str) -> IPv4Address:
+    """Returns the IPv4 address of the given interface (f.e. 'eth0')."""
+
+    for address in _get_interface_addresses(interface):
+        if address.family == AddressFamily.AF_INET:
+            return IPv4Address(address.address)
+
+    raise ValueError(f"Cannot obtain IP address of interface {interface}")