Support IAM Instance Roles

[ianbamforth]

Would be great to be able to use the Role of the EC2 instance you're running on in order to avoid the need for credentials to be stored anywhere. Seems pretty simple to support - I've done a very quick and dirty local hack to accomplish this.

[maglub]

Hi!

I am very interested. Would you like to share your quick and dirty hack? Then I can assess how to implement it in the mainstream code.

Best,
//magnus

[ianbamforth]

Hi maglub,

I think you have to use the v2 sdk in order to do this, although I'm not 100% on that. Main change for that was to change AWS. to Aws. throughout, and <service>.new() to <service>.Client.new(), plus the consequent aws_api.client.* to aws_api.*. Also AWS.config has changed, so e.g. AWS.config(:region => regionOverride) becomes Aws.config.update({:region => regionOverride}).

I'm only currently using it for a single check, so I haven't thoroughly tested it, but seems ok so far. If you need any further info let me know!

Ian