awscli と jq を使ってインスタンスタイプを変更する奴

gistfile1.sh

#!/bin/sh
AWS_PROFILE='YOUR aws-cli PROFILE HERE'
INSTANCE_ID='YOUR INSTANCE ID HERE'
INSTANCE_TYPE='YOUR INSTANCE TYPE HERE'
PUBLIC_IP='YOUR INSTANCE EIP HERE'

while :
do
  EC2_STATE=`aws ec2 describe-instances --profile ${AWS_PROFILE} --instance-ids ${INSTANCE_ID} | jq -r '.Reservations []  .Instances [] .State | .Name'`
  if [ $EC2_STATE = 'running' ]; then
    aws ec2 stop-instances --profile ${AWS_PROFILE} --instance-ids ${INSTANCE_ID}
  fi
  if [ $EC2_STATE = 'stopped' ]; then
    break
  fi
  echo "${INSTANCE_ID} : ${EC2_STATE}"
  sleep 10
done

aws ec2 modify-instance-attribute --profile ${AWS_PROFILE} --instance-id ${INSTANCE_ID} --instance-type ${INSTANCE_TYPE}
aws ec2 start-instances --profile ${AWS_PROFILE} --instance-ids ${INSTANCE_ID}
while :
do
  EC2_STATE=`aws ec2 describe-instances --profile ${AWS_PROFILE} --instance-ids ${INSTANCE_ID} | jq -r '.Reservations []  .Instances [] .State | .Name'`
  if [ $EC2_STATE = 'running' ]; then
    break
  fi
  echo "${INSTANCE_ID} : ${EC2_STATE}"
  sleep 10
done
EC2_EIP=`aws ec2 describe-instances --profile ${AWS_PROFILE} --instance-ids ${INSTANCE_ID} | jq -r '.Reservations []  .Instances [] .PublicIpAddress'`
if [ $EC2_EIP != $PUBLIC_IP ]; then
  aws ec2 associate-address --profile ${AWS_PROFILE} --instance-id ${INSTANCE_ID} --public-ip ${PUBLIC_IP}
fi