Helper for aws ec2 CLI

awsEc2Helper.sh

#!/bin/bash
# This is a helper for aws ec2 CLI
# https://gist.github.com/shadiakiki1986/a4bc2956eaaef7dede10

if [ $# -ne 2 ] || [ "$2" == "help" ]; then
  echo "Usage:"
  echo "       bash $0 id '*'"
  echo "       bash $0 id udacity"
  echo "       bash $0 id '*udacity*'"
  echo "       bash $0 start id"
  echo "       bash $0 state id"
  echo "       bash $0 ip id"
  echo "       bash $0 stop id"
  echo "       bash $0 start 'ffa-mfe test 4'"
  echo "       bash $0 stop  'ffa-mfe test 4'"
  echo "       bash $0 state 'ffa-mfe test 4'"
  echo "       bash $0 ssh 'ffa-mfe test 4'"
  echo "       bash $0 help"
  exit 1
fi

main() {
  cmd="$1"
  id="$2"
  case "$cmd" in
    "id")
      aws ec2 describe-instances --filters "Name=tag-value,Values=$id" --query 'Reservations[*].Instances[*].[InstanceId,Tags[*].Value]' --output text
      ;;
    "start")
      aws ec2 start-instances --instance-ids "$id"
      ;;
    "ip")
      aws ec2 describe-instances --instance-ids "$id" --query 'Reservations[*].Instances[*].NetworkInterfaces[*].Association' --output text
      ;;
    "stop")
      aws ec2 stop-instances --instance-ids "$id"
      ;;
    "state")
      x=$(aws ec2 describe-instances --instance-ids "$id" --query 'Reservations[*].Instances[*].State' --output text)
      if [ $? -eq 0 ]; then
        echo $x | awk '{print $2}';
      else
        return $?
      fi
      ;;
  esac
}

if [ "$1" != "ssh" ]; then
  main "$1" "$2"
  exit
fi

id1="$2"
echo main state "$id1"
state=$(main 'state' "$id1")
if [ $? -ne 0 ]; then
  echo main id $id1
  id2=$(main "id" "$id1")
  if [ $? -ne 0 ]; then
    echo "Couldnt match neither ID nor name. Aborting"
    exit 1
  else
    id1=$id2
    echo main state $id2
    state=$(main "state" "$id2")
  fi
fi

echo "State is '$state'"
case "$state" in
  "*")
    echo "State not stopped ... not doing anything"
    exit 3
    ;;
  "stopped")
    main "start" $id1
    echo "Sleeping 30 secs while ec2 instance boots"
    sleep 30
    ;;
  "running")
    echo "Already running, not doing anything, just ssh"
    ;;
esac

echo main ip $id1
ip=$(main "ip" $id1|awk '{print $3}')
echo "Result: $ip"
if [ -z "$ip" ]; then
  echo "ec2 instance not up after 30 secs. Aborting"
  exit 2
fi

ssh -i aws1.pem ubuntu@$ip