discovery of amazon instances by tag

ec2-dynamic-discovery.sh

#!/bin/sh
export JAVA_HOME=/opt/java/current
export EC2_PRIVATE_KEY=/home/ubuntu/cloudstrap.io/modules/amazon/files/certs/pk.pem
export EC2_CERT=/home/ubuntu/cloudstrap.io/modules/amazon/files/certs/cert.pem
export EC2_HOME=/opt/ec2-api-tools-1.5.3.1
export PATH=$PATH:$EC2_HOME/bin

ec2-describe-tags --filter "resource-type=instance" --filter "key=node" | while read x;
do
        node=`echo $x | awk '{print $5}'`
        instance=`echo $x | awk '{print $3}'`
        url=`ec2-describe-instances --filter tag:node=$node --filter instance-state-code=16 | grep INSTANCE | awk '{print $15 ":8080/solr"}'`
        echo $url/$node
done