monitor available docker free space in ECS

ecs_mon_docker_freespace.sh

#!/bin/bash

instanceid=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)
region=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | awk -F\" '/region/ {print $4}')
ip=$(curl -s http://169.254.169.254/latest/meta-data/local-ipv4)

free_space=$(docker info |grep "Data Space Available" |grep G  |awk -F "." {'print $1'} |awk {'print $NF'})
metric_name='DockerFreeSpace'


aws --region=${region} cloudwatch put-metric-data --metric-name DockerFreeSpace --namespace ECS  \
--value ${free_space} --dimensions IP=${ip}

aws --region=${region} cloudwatch put-metric-data --metric-name DockerFreeSpace --namespace ECS  \
--value ${free_space}