按地区了解EC2实例

Question

How to know EC2 instances by region from aws-cli?

Desired output:

Region name      name 
us-west-1         instance1
us-west-1         instance2
us-west-2         instance1
us-east-1         instance1

Answer 1

You can only list instances via the CLI from one region at a time. So you would write a script that loops through each region, getting the instances in each region.

Answer 2

Here's a good starting point for a script:

#!/bin/bash

all_regions="us-east-1 us-east-2 us-west-1 us-west-2"

echo "Region Name     Instance ID"
for region in ${all_regions}; do
  aws ec2 describe-instances --region ${region} | \
    grep '"InstanceId":' | \
    perl -pe "s/.*: \"(i-.*?)\".*/${region}       \1/"
done

The aws command above is the AWS command line interface:

https://aws.amazon.com/cli/

describe-instances is one of the commands for the AWS CLI:

http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html

grep and perl are standard utilities.