AWS Spot Pricing History

aws_spot_pricing.sh

#!/bin/bash

# catch ctrl+c handler
trap ctrl_c_cleanup INT

function ctrl_c_cleanup() {
  echo "** Interrupt handler caught"
  rm -rf spot_prices_*.json
}

function usage() {
  # us-west-1 us-west-2 us-east-1 eu-central-1 eu-west-1
  REGIONS=`aws ec2 describe-regions | jq '.Regions[] | .RegionName'`
  echo "Use the -k option to keep the files for further processing"
  echo -e "Please select a region below"
  echo -e "Region Listing:\n$REGIONS"
}

# Default region is us-west-2
REGION="us-west-2"

# Format is YEAR-MONTH-DAY
START_DATE=`date -d '7 days ago' +%Y-%m-%d`
END_DATE=`date +%Y-%m-%d`

while getopts "hns:e:r:" opt; do
  case $opt in
    s)
      START_DATE=${OPTARG}
      ;;
    e)
      END_DATE=${OPTARG}
      ;;
    r)
      REGION=${OPTARG}
      ;;
    n)
      now=true
      ;;
    k)
      keep=true
      ;;
    h | *)
      usage
      exit
      ;;
    \?)
      echo -e "Running EC2 Spot Instance History\n"
      ;;
    esac
done
shift $((OPTIND-1))

if [[ $now ]] ; then
  START_DATE=`date -d '-2 hours' -u +"%Y-%m-%dT%H:%M:%SZ"`
  END_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"`
fi

# Find the list of availability zones
ZONES=`aws ec2 describe-availability-zones --region $REGION | jq '.AvailabilityZones[] | .ZoneName'`

for z in $ZONES
do
  # Remove quotes from string using bash inline string operations
  z=${z//\"}
  echo "Running describe spot history for ${z}"
  aws ec2 describe-spot-price-history --region $REGION \
    --availability-zone $z \
    --instance-types r3.2xlarge \
    --product-description "Linux/UNIX (Amazon VPC)" \
    --start-time $START_DATE \
    --end-time $END_DATE | jq -c .SpotPriceHistory[] > spot_prices_$START_DATE_$END_DATE_$z.json
done

# Add average cost / week
for f in `ls spot_prices*`
do
  echo -e "File Region: $f"
  echo -e "Avg spot price over date range: "
  cat $f | jq .SpotPrice | tr -d "\"" | python -c "import sys; sl = [float(l) for l in sys.stdin]; print sum(sl)/len(sl)"
  echo -e "Max Spot Price over date range: "
  cat $f | jq .SpotPrice | tr -d "\"" | sort -n -r  | head -n 1
  head -n 2 $f
  echo
done

if [[ ! $keep ]] ; then
  rm -rf spot_prices_*.json
fi