EC2 Instance Classification

Question

Is there a way to distinguish between EC2 sets of instances?

My use case is that I have a bunch of machines for the web tier and a bunch of machines of the search tier; currently, the only way to keep track of what each instance does is use a directory with rolls of your own resource, such as LDAP or a database.

Ideally, I would like to define the role of the machine from the metadata available from the AWS API.

Currently, the only approach I came up with is to have different roles in different security groups (even if this is not strictly required). Is there a better way?

Answer 1

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: http://docs.amazonwebservices.com/AWSEC2/2008-12-01/DeveloperGuide/index.html?ApiReference-SOAP-RunInstances.html

Answer 2

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Answer 3

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The AWS console shows a security group for each instance, so Gerald’s proposal to use a security group to identify different groups of instances will work there, but still not as good as having an editable label for each device.

Answer 4

Although this is not in AWS metadata, you can always use something like iClassify . It is designed as a metadata repository for servers, EC2 or not.