How to check application runs in AWS EC2 instance

Question

How can I check which platform my app runs, AWS EC2 instance, Azure Role instance and non-cloud system? now I do that like this:

if(isAzure())
{
    //run in         


        

Answer 1

The better way to do this would be to make a request to get instance metadata.

From the AWS Documentation:

To view all categories of instance metadata from within a running instance, use the following URI:

http://169.254.169.254/latest/meta-data/

On a Linux instance, you can use a tool such as cURL, or use the GET command, for example:

PROMPT> GET http://169.254.169.254/latest/meta-data/

Here's an example using the Python Boto wrapper:

from boto.utils import get_instance_metadata

m = get_instance_metadata()

if len(m.keys()) > 0:
    print "Running on EC2"

else:
    print "Not running on EC2"