Open Stack

HI Sylvain,

The change only makes the user have to supply a network ID if there is more than one private network available (and the issue there is that otherwise the assignment order in the Guest is random, which normally leads to all sorts of routing problems).

I'm running a standard Devstack with Neuron (built from trunk a couple of days ago), can see both a private and public network, and can boot VMs without having to supply any network info:

$ neutron net-list
+--------------------------------------+---------+--------------------------------------------------+
| id                                   | name    | subnets                                          |
+--------------------------------------+---------+--------------------------------------------------+
| 16f659a8-6953-4ead-bba5-abf8081529a5 | public  | a94c6a9d-bebe-461b-b056-fed281063bc0             |
| 335113bf-f92f-4249-8341-45cdc9d781bf | private | 51b97cde-d06a-4265-95aa-d9165b7becd0 10.0.0.0/24 |
+--------------------------------------+---------+--------------------------------------------------+

$ nova boot --image  cirros-0.3.1-x86_64-uec --flavor m1.tiny phil
+--------------------------------------+----------------------------------------------------------------+
| Property                             | Value                                                          |
+--------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                                         |
| OS-EXT-AZ:availability_zone          | nova                                                           |
| OS-EXT-STS:power_state               | 0                                                              |
| OS-EXT-STS:task_state                | scheduling                                                     |
| OS-EXT-STS:vm_state                  | building                                                       |
| OS-SRV-USG:launched_at               | -                                                              |
| OS-SRV-USG:terminated_at             | -                                                              |
| accessIPv4                           |                                                                |
| accessIPv6                           |                                                                |
| adminPass                            | DaX2mcPnEK9U                                                   |
| config_drive                         |                                                                |
| created                              | 2014-01-24T13:11:30Z                                           |
| flavor                               | m1.tiny (1)                                                    |
| hostId                               |                                                                |
| id                                   | 34210c19-7a4f-4438-b376-6e65722b4bd6                           |
| image                                | cirros-0.3.1-x86_64-uec (8ee8f7af-1327-4e28-a0bd-1701e04a6ba7) |
| key_name                             | -                                                              |
| metadata                             | {}                                                             |
| name                                 | phil                                                           |
| os-extended-volumes:volumes_attached | []                                                             |
| progress                             | 0                                                              |
| security_groups                      | default                                                        |
| status                               | BUILD                                                          |
| tenant_id                            | cc6258c6a4f34bd1b79e90f41bec4726                               |
| updated                              | 2014-01-24T13:11:30Z                                           |
| user_id                              | 3a497f5e004145d494f80c0c9a81567c                               |
+--------------------------------------+----------------------------------------------------------------+

$ nova list
+--------------------------------------+-------+--------+------------+-------------+------------------+
| ID                                   | Name  | Status | Task State | Power State | Networks         |
+--------------------------------------+-------+--------+------------+-------------+------------------+
| 34210c19-7a4f-4438-b376-6e65722b4bd6 | phil  | ACTIVE | -          | Running     | private=10.0.0.5 |
+--------------------------------------+-------+--------+------------+-------------+------------------+



From: Sylvain Bauza [mailto:sylvain.bauza at bull.net]
Sent: 23 January 2014 09:58
To: OpenStack Development Mailing List
Subject: [openstack-dev] [Nova] Why Nova should fail to boot if there are only one private network and one public network ?

Hi,

I filed a bug [1] a while ago about the impact of a review [2] which now prevents Nova to boot instances if there are two available networks within Neutron.
As a side effect, users now need to pass the nic ID on the nova boot command even for simple setups with only one private network (and subnet) and one public net (with one subnet)

IMHO, we should segragate public from private networks and only allow to count private networks.
This would have at least the benefit for devstack users and begineers to not wonder why it should give a nic hint for properly boot his VM.


Thoughts, before I'm submitting a review ?
-Sylvain


[1] https://bugs.launchpad.net/nova/+bug/1227506
[2] https://review.openstack.org/#/c/33996/
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