My commands in order:

# nova aggregate-create smlAgg nova
+----+--------+-------------------+-------+----------+
| Id | Name   | Availability Zone | Hosts | Metadata |
+----+--------+-------------------+-------+----------+
| 10 | smlAgg | nova              |       |          |
+----+--------+-------------------+-------+----------+
# nova aggregate-set-metadata 10 mem=true
Aggregate 10 has been successfully updated.
+----+--------+-------------------+-------+-------------------+
| Id | Name   | Availability Zone | Hosts | Metadata          |
+----+--------+-------------------+-------+-------------------+
| 10 | smlAgg | nova              | []    | {u'mem': u'true'} |
+----+--------+-------------------+-------+-------------------+
# nova aggregate-add-host 10 n005
Aggregate 10 has been successfully updated.
+----+--------+-------------------+-----------+-------------------+
| Id | Name   | Availability Zone | Hosts     | Metadata          |
+----+--------+-------------------+-----------+-------------------+
| 10 | smlAgg | nova              | [u'n005'] | {u'mem': u'true'} |
+----+--------+-------------------+-----------+-------------------+
# nova aggregate-add-host 10 n006
Aggregate 10 has been successfully updated.
+----+--------+-------------------+--------------------+-------------------+
| Id | Name   | Availability Zone | Hosts              | Metadata          |
+----+--------+-------------------+--------------------+-------------------+
| 10 | smlAgg | nova              | [u'n005', u'n006'] | {u'mem': u'true'} |
+----+--------+-------------------+--------------------+-------------------+
# nova aggregate-add-host 10 n007
Aggregate 10 has been successfully updated.
+----+--------+-------------------+-----------------------------+-------------------+
| Id | Name   | Availability Zone | Hosts                       | Metadata          |
+----+--------+-------------------+-----------------------------+-------------------+
| 10 | smlAgg | nova              | [u'n005', u'n006', u'n007'] | {u'mem': u'true'} |
+----+--------+-------------------+-----------------------------+-------------------+
# nova-manage instance_type set_key --name=m1.tiny  --key=mem --value=true
Key mem set to true on instance type m1.tiny
# nova flavor-show m1.tiny
+----------------------------+-------------------+
| Property                   | Value             |
+----------------------------+-------------------+
| OS-FLV-DISABLED:disabled   | False             |
| OS-FLV-EXT-DATA:ephemeral  | 0                 |
| disk                       | 0                 |
| extra_specs                | {u'mem': u'true'} |
| id                         | 1                 |
| name                       | m1.tiny           |
| os-flavor-access:is_public | True              |
| ram                        | 512               |
| rxtx_factor                | 1.0               |
| swap                       |                   |
| vcpus                      | 1                 |
+----------------------------+-------------------+
# nova boot --image c6714433-1653-463c-906a-9511e3e6b21b --flavor m1.tiny test
+-------------------------------------+---------------------------------------------------------------------------------+
| Property                            | Value                                                                           |
+-------------------------------------+---------------------------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                                          |
| OS-EXT-SRV-ATTR:host                | None                                                                            |
| OS-EXT-SRV-ATTR:hypervisor_hostname | None                                                                            |
| OS-EXT-SRV-ATTR:instance_name       | instance-00000250                                                               |
| OS-EXT-STS:power_state              | 0                                                                               |
| OS-EXT-STS:task_state               | None                                                                            |
| OS-EXT-STS:vm_state                 | error                                                                           |
| accessIPv4                          |                                                                                 |
| accessIPv6                          |                                                                                 |
| adminPass                           | ************                                                                    |
| config_drive                        |                                                                                 |
| created                             | 2013-07-03T21:23:22Z                                                            |
| fault                               | {u'message': u'NoValidHost', u'code': 500, u'created': u'2013-07-03T21:23:23Z'} |
| flavor                              | m1.tiny                                                                         |
| hostId                              |                                                                                 |
| id                                  | 53e42fa5-8d72-4f80-8586-eb7f20cd14d0                                            |
| image                               | CentOS_6                                                                        |
| key_name                            | None                                                                            |
| metadata                            | {}                                                                              |
| name                                | test                                                                            |
| security_groups                     | [{u'name': u'default'}]                                                         |
| status                              | ERROR                                                                           |
| tenant_id                           | 4c2340f60b7c48a0a2504eeefe2ff74a                                                |
| updated                             | 2013-07-03T21:23:23Z                                                            |
| user_id                             | 3800b26a95c44e7abd1c080f7695560a                                                |
+-------------------------------------+---------------------------------------------------------------------------------+