updated SC methods to work with a group_id, which must be used if it's a group in a VPC

moto/ec2/models.py

@@ -331,15 +331,17 @@ class SecurityGroupBackend(object):
     def describe_security_groups(self):
         return itertools.chain(*[x.values() for x in self.groups.values()])
 
-    def delete_security_group(self, name_or_group_id, vpc_id):
-        if name_or_group_id in self.groups[vpc_id]:
-            # Group Id
-            return self.groups[vpc_id].pop(name_or_group_id)
-        else:
-            # Group Name
-            group = self.get_security_group_from_name(name_or_group_id, vpc_id)
+    def delete_security_group(self, name=None, group_id=None):
+        if group_id:
+            # loop over all the SGs, find the right one
+            for vpc in self.groups.values():
+                if group_id in vpc:
+                    return vpc.pop(group_id)
+        elif name:
+            # Group Name.  Has to be in standard EC2, VPC needs to be identified by group_id
+            group = self.get_security_group_from_name(name, None)
             if group:
-                return self.groups[vpc_id].pop(group.id)
+                return self.groups[None].pop(group.id)
 
     def get_security_group_from_name(self, name, vpc_id):
         for group_id, group in self.groups[vpc_id].iteritems():

moto/ec2/responses/security_groups.py

@@ -41,11 +41,16 @@ class SecurityGroups(object):
 
     def delete_security_group(self):
         # TODO this should raise an error if there are instances in the group. See http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-DeleteSecurityGroup.html
-        name = self.querystring.get('GroupName')[0]
-        vpc_id = self.querystring.get("VpcId", [None])[0]
 
-        # needs vpc now
-        group = ec2_backend.delete_security_group(name, vpc_id)
+        name = self.querystring.get('GroupName')
+        sg_id = self.querystring.get('GroupId')
+
+        if name:
+            group = ec2_backend.delete_security_group(name[0])
+        elif sg_id:
+            group = ec2_backend.delete_security_group(group_id=sg_id[0])
+
+        # needs name or group now
         if not group:
             # There was no such group
             return "There was no security group with name {0}".format(name), dict(status=404)