adding mtu and speed tags to interfaces that support it

network/datadog_checks/network/check_linux.py

@@ -127,12 +127,23 @@ def check(self, _):
  # lo:45890956 112797 0 0 0 0 0 0 45890956 112797 0 0 0 0 0 0 # noqa: E501
  # eth0:631947052 1042233 0 19 0 184 0 1206 1208625538 1320529 0 0 0 0 0 0 # noqa: E501
  # eth1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 # noqa: E501
+ sys_net_location = '/sys/class/net'
  for line in lines[2:]:
  cols = line.split(':', 1)
  x = cols[1].split()
  # Filter inactive interfaces
  if self.parse_int(x[0]) or self.parse_int(x[8]):
  iface = cols[0].strip()
+
+ # Try to get the NIC speed and MTU for additional tagging
+ meta_tags = []
+ speed_path = os.path.join(sys_net_location, iface, 'speed')
+ mtu_path = os.path.join(sys_net_location, iface, 'mtu')
+ if (speed_value := self._read_int_file(speed_path)):
+ meta_tags.extend(['speed:' + str(speed_value)])
+ if (mtu_value := self._read_int_file(mtu_path)):
+ meta_tags.extend(['mtu:' + str(mtu_value)])
+
  metrics = {
  'bytes_rcvd': self.parse_int(x[0]),
  'bytes_sent': self.parse_int(x[8]),
@@ -143,7 +154,7 @@ def check(self, _):
  'packets_out.drop': self.parse_int(x[11]),
  'packets_out.error': self.parse_int(x[10]) + self.parse_int(x[11]),
  }
- self.submit_devicemetrics(iface, metrics, custom_tags)
+ self.submit_devicemetrics(iface, metrics, meta_tags + custom_tags)
  self._handle_ethtool_stats(iface, custom_tags)
 
  netstat_data = {}