Added nic tags for VMs.

ccnode/hypervisor/domains/__init__.py

@@ -2,6 +2,7 @@ import logging
 import weakref
 from StringIO import StringIO
 from xml.etree import cElementTree as et
+from collections import namedtuple
 
 from ccnode.tags import Tag, tag_inspector
 from ccnode.hypervisor import lib as _libvirt
@@ -12,6 +13,9 @@ from ccnode.hypervisor.domains import vm_tags
 logger = logging.getLogger(__name__)
 
 
+NetworkInterface = namedtuple('NetworkInterface', ('source', 'mac', 'model'))
+
+
 class VirtualMachine(object):
     """Represent a VM instance."""
     def __init__(self, dom, hypervisor):
@@ -39,6 +43,14 @@ class VirtualMachine(object):
                 self.tags[t.name] = t
 
             i += 1
+        i = 0
+        for nic in self.iter_nics():
+            for t in (
+                Tag('nic%s_mac' % i, nic.mac),
+                Tag('nic%s_source' % i, nic.source),
+                Tag('nic%s_model' %i, nic.model),
+            ):
+                self.tags[t.name] = t
 
         logger.debug(self.tags)
 
@@ -88,3 +100,30 @@ class VirtualMachine(object):
                 continue
 
             yield volume
+
+    @property
+    def nics(self):
+        return list(self.iter_nics())
+
+    def iter_nics(self):
+        for nic in et.ElementTree().parse(
+            StringIO(self.lv_dom.XMLDesc(0))
+        ).findall('devices/interface'):
+            if nic.get('type') == 'bridge':
+                try:
+                    mac = nic.find('mac').get('address')
+                except AttributeError:
+                    mac = None
+                try:
+                    model = nic.find('model').get('type')
+                except AttributeError:
+                    model = None
+                try:
+                    source = nic.find('source').get('bridge')
+                except AttributeError:
+                    source = None
+                yield NetworkInterface(
+                    mac=mac,
+                    source=source,
+                    model=model,
+                )

ccnode/hypervisor/domains/vm_tags.py

@@ -69,8 +69,9 @@ status.ttl = 1
 
 def disk(dom):
     """Get backend disks."""
-    return u' '.join(map(str, xrange(len(dom.disks))))
+    return u' '.join(map(str, xrange(len(dom.disks)))) or None
 
 
-def nic_():
-    pass
+def nic(dom):
+    """VM network interfaces."""
+    return u' '.join(map(str, xrange(len(dom.nics)))) or None