Obtain vagrant-aws instance ID

[Robert Fynes]

Hi,

Is it possible to get the EC2 instance ID of an instance launched using the vagrant-aws plugin, and if so, how?

Thanks,

-Rob

[Mike]

From inside or outside?

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[Robert Fynes]

From outside.

[Robert Fynes]

Actually, I'm trying to get the public DNS name of the launched instance, but I think I'd like to get the instance ID too.

I'd actually like to get as much information as possible about the instance, but if I have the instance ID, I guess I can use the ec2 api to get whatever I want.

Maybe I should be using Chefs knife ec2 tool instead of Vagrant. My understanding is that Vagrant provides the kind of abstraction so that you don't have to concern yourself with the instance details.

Still, I'd like to use Vagrant.

[Mike]

Dunno. You might inspect around this variable 
https://github.com/mitchellh/vagrant-aws/blob/master/lib/vagrant-aws/action/run_instance.rb#L93

[Robert Fynes]

I got this to work:

rfynes@rfynes-laptop$ vagrant ssh --command 'curl -s http://169.254.169.254/latest/meta-data/instance-id'

i-9a91e7d7

...this is the list of metadata that you can pull:

rfynes@rfynes-laptop$ vagrant ssh --command 'curl -s http://169.254.169.254/latest/meta-data/'

ami-id

ami-launch-index

ami-manifest-path

block-device-mapping/

hostname

instance-action

instance-id

instance-type

kernel-id

local-hostname

local-ipv4

mac

metrics/

network/

placement/

profile

public-hostname

public-ipv4

public-keys/

reservation-id

security-groups

...and user-data is possible too. 

It's probably not ideal, though (e.g. windows). I think I'd still prefer to pull the id from vagrant, if possible, and then use ec2 tools to get whatever I want.

I'll take a closer look at the source that you referred to, thanks!

[Torben Knerr]

You can use the vagrant-awsinfo plugin to get the instance id from the outside:

https://github.com/johntdyer/vagrant-awsinfo

[Robert Fynes]

Perfect, thanks.

[Robert Fynes]

For what it's worth, I've discovered that after running 'vagrant up', the automatically generated .vagrant directory (in the root) contains a file .vagrant/machines/default/aws/id (or similar).

This file contains the EC2 instance ID of the launched instance (and nothing else - no line-break).

On Friday, 14 June 2013 12:30:12 UTC+1, Robert Fynes wrote:

[Torben Knerr]

I believe 'vagrant ssh-config' should do as well and does not require an additional plugin to be installed.

Have heard of it but not tried it yet...

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