Add ability to filter on image and flavor names

The fun part about having multiple vendors providing the same cloud
is that while their APIs are the same, what they do with their metadata
tends to be ... fun. So in order to be able to express sanely what you
want without needing to stick tons of unreadable uuids in your config,
it turns out what sometimes you need to further filter image and flavor
names. Specific examples are (deprecated) images in HP Cloud and the
Standard and Performance flavors on Rackspace.

cloud/nova_compute

@@ -17,6 +17,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this software.  If not, see <http://www.gnu.org/licenses/>.
 
+import operator
 import os
 
 try:
@@ -81,6 +82,9 @@ options:
         - The name of the base image to boot. Mutually exclusive with image_id
      required: true
      default: None
+   image_filter:
+     description:
+        - Text to use to filter image names, for the case, such as HP, where there are multiple image names matching the common identifying portions. image_filter is a negative match filter - it is text that may not exist in the image name. Defaults to "(deprecated)"
    flavor_id:
      description:
         - The id of the flavor in which the new VM has to be created. Mutually exclusive with flavor_ram
@@ -91,6 +95,9 @@ options:
         - The minimum amount of ram in MB that the flavor in which the new VM has to be created must have. Mutually exclusive with flavor_id
      required: false
      default: 1
+   flavor_filter:
+     description:
+        - Text to use to filter flavor names, for the case, such as Rackspace, where there are multiple flavors that have the same ram count. flavor_filter is a positive match filter - it must exist in the flavor name.
    key_name:
      description:
         - The key pair name to be used when creating a VM
@@ -335,26 +342,22 @@ def _get_ips(addresses, ext_tag, key_name):
 
 def _get_image_id(module, nova):
     if module.params['image_name']:
-        image = None
-        for img in nova.images.list():
-            if img.name == module.params['image_name']:
-                image = img
-                break
-            if img.name.startswith(module.params['image_name']) and '(deprecated)' not in img.name:
-                image = img
-        if not image:
-            module.fail_json(msg = "Error finding image id from name(%s)" % module.params['image_name'])
-        return image.id
+        for image in nova.images.list():
+            if (module.params['image_name'] in img.name and (
+                    not module.params['image_filter']
+                    or module.params['image_filter'] not in img.name)):
+                return image.id
+        module.fail_json(msg = "Error finding image id from name(%s)" % module.params['image_name'])
     return module.params['image_id']
 
 
 def _get_flavor_id(module, nova):
     if module.params['flavor_ram']:
-        try:
-            flavor = nova.flavors.find(ram=module.params['flavor_ram'])
-        except exceptions.NotFound as e:
+        for flavor in sorted(nova.flavors.list(), key=operator.attrgetter('ram')):
+            if (flavor.ram >= module.params['flavor_ram'] and
+                    (not module.params['flavor_filter'] or module.params['flavor_filter'] in flavor.name)):
+                return flavor.id
             module.fail_json(msg = "Error finding flavor with %sMB of RAM" % module.params['flavor_ram'])
-        return flavor.id
     return module.params['flavor_id']
 
 
@@ -440,8 +443,10 @@ def main():
         name                            = dict(required=True),
         image_id                        = dict(default=None),
         image_name                      = dict(default=None),
+        image_filter                    = dict(default='(deprecated)'),
         flavor_id                       = dict(default=1),
         flavor_ram                      = dict(default=None, type='int'),
+        flavor_filter                   = dict(default=None),
         key_name                        = dict(default=None),
         security_groups                 = dict(default='default'),
         nics                            = dict(default=None),
@@ -488,7 +493,7 @@ def main():
         _get_server_state(module, nova)
         _delete_server(module, nova)
 
-# this is magic, see lib/ansible/module.params['common.py
+# this is magic, see lib/ansible/module_common.py
 from ansible.module_utils.basic import *
 from ansible.module_utils.openstack import *
 main()