Find region from within an EC2 instance

Question

Is there a way to look up the region of an instance from within the instance?

I\'m looking for something similar to the method of finding the instance id.

Answer 1

If you're running on windows, you can use this powershell one-liner:

$region=(Invoke-RestMethod "http://169.254.169.254/latest/dynamic/instance-identity/document").region

Answer 2

ec2-metadata --availability-zone | sed 's/.$//'

For debian based systems, the command is without dash.

ec2metadata --availability-zone | sed 's/.$//'

Answer 3

If you're able to use the AWS Java SDK, there is now a method that will return the current region name (such as "us-east-1", "eu-west-1"):

http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/regions/Regions.html#getCurrentRegion()

Answer 4

2 liner that works as long as you are using ec2.internal as your search domain:

az=$(curl -s http://instance-data/latest/meta-data/placement/availability-zone)
region=${az:0:${#az} - 1}

Answer 5

For the sed and curl solution it looks like format has changed a bit. For me works

curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | sed -n 's/ "region" : "\(.*\)"[,]/\1/p'

Answer 6

Use JQ:

curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | jq -r .region