Set the MAC to the primary interface

Adds support for a new 'primary' interface option exposed via the
object model and JSON parsers which can be used to force the
MAC address on a bridge. Only one interface on a given
bridge (or bond) may be set as the primary interface.

Also, update the ifcfg and eni providers so that they use
OVS_EXTRA (or ovs_extra) to pin the mac accordingly.

1 files changed, 9 insertions, 0 deletions

diff --git a/os_net_config/utils.py b/os_net_config/utils.py
index a2df823..cd7ee65 100644
--- a/os_net_config/utils.py
+++ b/os_net_config/utils.py
@@ -34,6 +34,15 @@ def get_file_data(filename):
         return ""
 
 
+def interface_mac(name):
+    try:
+        with open('/sys/class/net/%s/address' % name, "r") as f:
+            return f.read().rstrip()
+    except IOError:
+        logger.error("Unable to read file: %s" % name)
+        raise
+
+
 def diff(filename, data):
     file_data = get_file_data(filename)
     logger.debug("Diff file data:\n%s" % file_data)