Stabilize the mac address generation.

Mac address is now stored in plaintext on the file system.

slapos/recipe/generatemac.py

-
 ##############################################################################
 #
 # Copyright (c) 2010 Vifib SARL and Contributors. All Rights Reserved.
@@ -26,15 +25,26 @@
 #
 ##############################################################################
 import random
+import os
 
 from slapos.recipe.librecipe import GenericBaseRecipe
 
 class Recipe(GenericBaseRecipe):
 
   def __init__(self, buildout, name, options):
-    # First octet has to represent a locally administered address
-    octet_list = [254] + [random.randint(0x00, 0xff) for x in range(5)]
-    options['mac-address'] = ':'.join(['%02x' % x for x in octet_list])
+    if os.path.exists(options['storage-path']):
+      open_file = open(options['storage-path'], 'r')
+      options['mac-address'] = open_file.read()
+      open_file.close()
+
+    if options.get('mac-address', '') == '':
+      # First octet has to represent a locally administered address
+      octet_list = [254] + [random.randint(0x00, 0xff) for x in range(5)]
+      options['mac-address'] = ':'.join(['%02x' % x for x in octet_list])
+    return GenericBaseRecipe.__init__(self, buildout, name, options)
 
   def install(self):
-    return []
+    open_file = open(self.options['storage-path'], 'w')
+    open_file.write(self.options['mac-address'])
+    open_file.close()
+    return [self.options['storage-path']]

software/kvm/instance-kvm.cfg

@@ -33,6 +33,7 @@ ca-dir = $${rootdirectory:srv}/ssl
 
 [create-mac]
 recipe = slapos.cookbook:generate.mac
+storage-path = $${rootdirectory:srv}/mac
 
 [kvm-instance]
 recipe = slapos.cookbook:kvm