Utility script to grab info about the current CoreOS release

coreos-ami

#!/bin/bash

# Default to us-east-1 region
region=${1:-"us-east-1"}

# CoreOS channel ["stable" | "beta" | "alpha"]
channel=${2:-"stable"}

# AWS AMI disk backing ["pv" | "hvm"]
disk=hvm

ami_id=$(curl --silent --location http://$channel.release.core-os.net/amd64-usr/current/coreos_production_ami_all.json | grep -A 2 $region | grep $disk | cut -d"\"" -f4)
[ -z "$ami_id" ] && echo "FAIL: region $region not found or doesn't include a $channel, $disk backed CoreOS AMI" && exit 1
build=$(curl --silent --location http://stable.release.core-os.net/amd64-usr/current/version.txt | grep COREOS_VERSION= | sed -e 's|^COREOS_VERSION=||')

echo "channel,region,build,disk,id,ami,url"
echo "$channel,$region,$build,$disk,$ami_id,https://console.aws.amazon.com/ec2/home?region=$region#launchAmi=$ami_id"

exit 0