Get CPU credits Usage and remaining via local metadata on EC2 instance

ec2-get-cpu-credits.sh

#!/usr/bin/env bash
echo "Get CPU credits Usage and remaining via local metadata on EC2"
set -euo pipefail
AWS_DEFAULT_REGION="$(curl -s 169.254.169.254/latest/meta-data/placement/availability-zone)"
AWS_DEFAULT_REGION="${AWS_DEFAULT_REGION::-1}" # strip char from az
INSTANCE="$(curl -s 169.254.169.254/latest/meta-data/instance-id )"
FREQUENCY=600 # Get a point every 10 min
LAST="180 minutes ago"
START="$(date +'%Y-%m-%dT%H:%M:59Z' --utc -d "${LAST}" )"
END="$(date +'%Y-%m-%dT%H:%M:59Z' --utc )"
DIMENSION="{\"Name\":\"InstanceId\",\"Value\":\"${INSTANCE}\"}"
RED='\033[0;31m'
NC='\033[0m' # No Color
# http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/viewing_metrics_with_cloudwatch.html
for m in CPUCreditBalance CPUCreditUsage; do
  echo "---------------------------------------------"
  echo -e "${RED}$m for ${INSTANCE} (last ${LAST::-4})${NC}"
  aws cloudwatch get-metric-statistics \
    --namespace 'AWS/EC2' \
    --region "$AWS_DEFAULT_REGION" \
    --period "$FREQUENCY" \
    --start-time "$START" \
    --end-time "$END" \
    --metric-name "$m" \
    --dimensions "$DIMENSION" \
    --statistic Average \
    --query 'Datapoints[*].[Timestamp,Average,Unit]' \
    --output text \
    | awk '{printf("%s %.2f\n", $1,$2)}' \
    | sort \
    | column -t
done