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

On ec2 Ubuntu instances, the file /sys/hypervisor/uuid exists and its first three characters are 'ec2'. I like using this because it doesn't rely on external servers.