easy ec2 ubuntu server creation

ec2-ubuntu.sh

#! /usr/bin/env bash

if [ -z $1 ]; then
  echo "ec2-ubuntu - easy ec2 ubuntu server creation"
  echo "Usage: $0 instance-name [instance-type [ami [region]]]"
  exit
fi
instancename=$1
instancetype=${2:-'t1.micro'}
ami=${3:-'ami-1234de7b'}
region=${4:-'us-east-1'}

function run() {
  echo "$@"
  eval "$@"
}

if [ ! -f $HOME/.ec2/$instancename.pem ]; then
  run "ec2-add-keypair $instancename > $HOME/.ec2/$instancename.pem"
  run chmod 0600 $HOME/.ec2/$instancename.pem
fi

echo "starting instance..."
run 'instance=`ec2-run-instances '"$ami"' --instance-type '"$instancetype"' --region '"$region"' --key '"$instancename"' | grep INSTANCE`'
iid=`echo $instance | cut -d' ' -f2`
status='pending'
while [ $status != 'running' ]; do
  run 'description=`ec2-describe-instances '"$iid"' | grep INSTANCE`'
  status=`echo "$description" | cut -f6`
  echo "waiting for instance to boot (status: $status)..."
  sleep 3
done

hostname=`echo "$description" | cut -f4`

while true; do
  nc -z $hostname 22 && break
  echo 'waiting for ssh to start...'
  sleep 3
done
sleep 10 # ssh needs a bit of time to warm up

echo

echo "setting up ~/.ssh/config..."
run 'cat <<END >> ~/.ssh/config

Host '"$instancename"'
  HostName '"$hostname"'
  HostKeyAlias '"$hostname"'
  User ubuntu
  ForwardAgent yes
  StrictHostKeyChecking no
  IdentityFile ~/.ec2/'"$instancename.pem"'
END'
echo

# prepare it for micro
if [ $instancetype == 't1.micro' ]; then
  run ssh $instancename "'"'sudo sed -i.dist "\,/dev/sda2,s,^,#," /etc/fstab'"'"
fi

echo "setup complete, to get started:"
echo "  > ssh $instancename"