Merge "Userdata plugin with minimal MIME support added."

Deployment/cloudbase-init/plugins/userdata.py

@@ -0,0 +1,119 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 Cloudbase Solutions Srl
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import re
+import tempfile
+import uuid
+import email
+import tempfile
+import os
+import errno
+
+from cloudbaseinit.openstack.common import cfg
+from cloudbaseinit.openstack.common import log as logging
+from cloudbaseinit.osutils.factory import *
+from cloudbaseinit.plugins.base import *
+
+LOG = logging.getLogger(__name__)
+
+opts = [
+    cfg.StrOpt('user-data_folder', default='cloud-data',
+        help='Specifies a folder to store multipart data files.'),
+  ]
+
+CONF = cfg.CONF
+CONF.register_opts(opts)
+
+class UserDataPlugin():
+	def __init__(self, cfg=CONF):
+		self.cfg = cfg
+		self.msg = None
+		return
+
+    def execute(self, service):
+        user_data = service.get_user_data('openstack')
+        if not user_data:
+            return False
+
+        LOG.debug('User data content:\n%s' % user_data)
+
+		if user_data.starts_with('Content-Type: multipart'):
+			for part in self.parse_MIME(user_data):
+			    self.process_part(part)
+		else:
+			self.handle(user_data)
+		return
+
+	def process_part(self, part):
+		if part.get_filename() == 'cfn-userdata':
+			self.handle(part.get_payload())
+		return
+
+	def parse_MIME(self, user_data):
+	    folder = self.cfg.user-data_folder
+	    self.create_folder(folder)
+
+		self.msg = email.message_from_string(user_data)
+		return self.msg.walk()
+
+
+    def create_folder(self, folder):
+    	try:
+    		os.mkdir(folder)
+    	except os.OSError, e:
+    		if e.errno != errno.EEXIST:
+    			raise e
+    	return
+
+    def handle(self, user_data):
+
+        osutils = OSUtilsFactory().get_os_utils()
+
+        target_path = os.path.join(tempfile.gettempdir(), str(uuid.uuid4()))
+        if re.search(r'^rem cmd\s', user_data, re.I):
+            target_path += '.cmd'
+            args = [target_path]
+            shell = True
+        elif re.search(r'^#!', user_data, re.I):
+            target_path += '.sh'
+            args = ['bash.exe', target_path]
+            shell = False
+        elif re.search(r'^#ps1\s', user_data, re.I):
+            target_path += '.ps1'
+            args = ['powershell.exe', '-ExecutionPolicy', 'RemoteSigned',
+                    '-NonInteractive', target_path]
+            shell = False
+        else:
+            # Unsupported
+            LOG.warning('Unsupported user_data format')
+            return False
+
+        try:
+            with open(target_path, 'wb') as f:
+                f.write(user_data)
+            (out, err, ret_val) = osutils.execute_process(args, shell)
+
+            LOG.info('User_data script ended with return code: %d' % ret_val)
+            LOG.debug('User_data stdout:\n%s' % out)
+            LOG.debug('User_data stderr:\n%s' % err)
+        except Exception, ex:
+            LOG.warning('An error occurred during user_data execution: \'%s\'' % ex)
+        finally:
+            if os.path.exists(target_path):
+                os.remove(target_path)
+
+        return False
+