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[JuanFra Rodriguez Cardoso <juanfra.rodriguez.cardoso@xxxxxxxxx>]

Ok! Thanks for your replies!

and 'wget 169.254.169.254'?? what info gets from?


2012/12/11 Marco CONSONNI <mcocmo62@xxxxxxxxx>

> Hello,
>
> nova-api-metada service is an optional nova daemon that implements an HTTP
> interface for retrieving metadata you associate to an instance at boot time
> (see --user-data parameter).
>
> Provided that you have installed and correctly configured it, try the
> following sequence for better understanding.
>
> Hope it helps,
> Marco.
>
>
> *At the client console, create a file and launch an instance with the
> following commands:*
> * *
>
> *
> *
>
> *$ echo 'This is user data!' > myFile.txt*
>
> *$ nova boot testUserData --image=19d24df6-be35-40fe-b61d-8cf381abf1f7
> --flavor=1  --user-data myFile.txt*
>
>
> +-------------------------------------+--------------------------------------+
>
> | 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-0000011c
> |
>
> | OS-EXT-STS:power_state              | 0
>       |
>
> | OS-EXT-STS:task_state               | scheduling
> |
>
> | OS-EXT-STS:vm_state                 | building
> |
>
> | accessIPv4                          |
> |
>
> | accessIPv6                          |
> |
>
> | adminPass                           | rXQ37SMMmu7D
> |
>
> | config_drive                        |
> |
>
> | created                             | 2012-11-14T17:11:47Z
> |
>
> | flavor                              | m1.tiny
> |
>
> | hostId                              |
> |
>
> | id                                  |
> f87e825b-e31f-4918-89ca-0fab3645cf44 |
>
> | image                               | cirros-0.3.0-x86_64-uec
> |
>
> | key_name                            | None
> |
>
> | metadata                            | {}
>          |
>
> | name                                | testUserData
> |
>
> | progress                            | 0
> |
>
> | security_groups                     | [{u'name': u'default'}]
> |
>
> | status                              | BUILD
> |
>
> | tenant_id                           | 43b38bc900c14082a14cda212c324f0a
> |
>
> | updated                             | 2012-11-14T17:11:47Z
> |
>
> | user_id                             | d3e8a1682a064f01ba80c45c28e6af6e
> |
>
>
> +-------------------------------------+--------------------------------------+
>
>
>
> *To retrieve the information from the metadata service, connect to the
> instance and submit the following commands:*
> * *
>
> *
> *
>
> *$ wget http://169.254.169.254/latest/user-data -O-<http://169.254.169.254/latest/user-data-O->
> *
>
> Connecting to 169.254.169.254 (169.254.169.254:80)
>
> This is user data!
>
> -                    100%
> |************************************************************************************************************|
> 19  --:--:-- ETA
>
>
>
> *Note: the command for retrieving data from the metadata service may vary
> both in the address of the service (here we used the default configuration
> address 169.254.169.254) and in the format of the wget command (depending
> on the OS of the image).*
> * *
>
>
>
>
>
>
>
> On Tue, Dec 11, 2012 at 7:29 AM, Matt Joyce <matt.joyce@xxxxxxxxxxxxxxxx>wrote:
>
>> It is not a necessity, but it is very useful.  Also look at config drive.
>>
>> -Matt
>>
>> On Mon, Dec 10, 2012 at 5:33 PM, Joshua Harlow <harlowja@xxxxxxxxxxxxx>wrote:
>>
>>> Its really just a binary that activates
>>> https://github.com/openstack/nova/blob/master/nova/api/metadata/handler.py#L100
>>>
>>> Its a way to allow for a VM to get metadata about itself and any
>>> userdata (of which users may have provided) on boot.
>>>
>>> Said feature is not just connected to ec2, but provides a generic
>>> mechanism for getting this type of data to an instance.
>>>
>>> The ec2 folks I believe are just the 'originators' of said concept and
>>> that’s how it got named initially.
>>>
>>> From: JuanFra Rodriguez Cardoso <juanfra.rodriguez.cardoso@xxxxxxxxx>
>>> Date: Monday, December 10, 2012 5:10 PM
>>> To: Openstack <openstack@xxxxxxxxxxxxxxxxxxx>
>>> Subject: [Openstack] Nova metadata service
>>>
>>> Hi guys!
>>>
>>> After looking for in the mailing list and docs, I honestly still don't
>>> understand what really is nova-api-metadata.
>>> it's a mandatory service in a multi-host deployment? it's only related
>>> to EC2?
>>>
>>> Thanks!
>>>
>>> Regards,
>>> JuanFra.
>>>
>>> _______________________________________________
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>>>
>>
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>>
>>
>
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>