From 39f5e815b82e30058ae96922ce26fc6fa81449b1 Mon Sep 17 00:00:00 2001
From: James Bromberger <james@rcpt.to>
Date: Wed, 25 Dec 2013 12:47:17 +0000
Subject: [PATCH] Process cloud config tasks only if they are configured.

---
 plugins/cloud_init/__init__.py | 11 ++++++++++-
 plugins/cloud_init/tasks.py    | 10 +++++++---
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/plugins/cloud_init/__init__.py b/plugins/cloud_init/__init__.py
index d80033f..df3a11c 100644
--- a/plugins/cloud_init/__init__.py
+++ b/plugins/cloud_init/__init__.py
@@ -27,7 +27,16 @@ def resolve_tasks(tasklist, manifest):
 	from tasks import DisableModules
 	from providers.ec2.tasks.initd import AddEC2InitScripts
 	from common.tasks import initd
-	tasklist.add(SetUsername, AutoSetMetadataSource, SetMetadataSource, DisableModules)
+
+	options = manifest.plugins['cloud_init']
+	tasklist.add(AutoSetMetadataSource)
+	if 'username' in options:
+		tasklist.add(SetUsername)
+	if 'disable_modules' in options:
+		tasklist.add(DisableModules)
+	if 'metadata_sources' in options:
+		tasklist.add(SetMetadataSource)
+
 	tasklist.remove(AddEC2InitScripts,
 	                initd.AddExpandRoot,
 	                initd.AdjustExpandRootScript,
diff --git a/plugins/cloud_init/tasks.py b/plugins/cloud_init/tasks.py
index df8f917..5613a56 100644
--- a/plugins/cloud_init/tasks.py
+++ b/plugins/cloud_init/tasks.py
@@ -68,9 +68,13 @@ class DisableModules(Task):
 		  patterns = patterns + ")$"
 		  regex = re.compile(patterns)
 
-		  f = open(info.root + "/etc/cloud/cloud.cfg")
-		  lines = f.readlines()
-		  f.close()
+		  try:
+		    f = open(info.root + "/etc/cloud/cloud.cfg")
+		    lines = f.readlines()
+		    f.close()
+		  except:
+		    print "Cannot read cloud.cfg"
+		    return -1
 
 		  f = open(info.root + "/etc/cloud/cloud.cfg", "w")
 		  for line in lines: