awsstop

#!/bin/bash
#
# Given an aws instance name or other identifying information from
# format_aws_json.js output, stop it
#
# Depends on:
# 1) cache_run executable
# 2) ec2list executable
# 3) awscli python package and "aws" executable

# how long to cache aws info
CACHE_SECONDS=300

instance_name="$1"

if [ ! "$instance_name" ]
then
  echo "usage: $0 <instance_name_or_info>"
  exit 2
fi

header=$(cache_run $CACHE_SECONDS "ec2list" | head -1)
data=$(cache_run $CACHE_SECONDS "ec2list $instance_name" | tail -1)

# account for weird lost data
#
if [ \( ! "$data" \) -o "$(echo \"$data\" | grep running,\*$)" -o "$data" = "$header" ]
then
  echo "retrying to poll aws data"
  header=$(cache_run 0 "ec2list $instance_name" | head -1)
  data=$(cache_run $CACHE_SECONDS "ec2list $instance_name" | tail -1)
fi

# get column numbers
id_column="$(echo "$header"  | tr , \\n | grep -n InstanceId | cut -f1 -d: )"
state_column="$(echo "$header"  | tr , \\n | grep -n State.Name | cut -f1 -d: )"

id="$(echo "$data" | cut -f$id_column -d,)"
state="$(echo "$data" | cut -f$state_column -d,)"

if [ ! "$id" -o "$id" = "running" ]
then
  echo "Can't find dns info for server ($data)"
  exit 3
fi

if [ "$state" != "running" ]
then
  echo "Invalid state to stop instance from: $state"
  exit 4
fi

echo aws ec2 stop-instances --instance-id $id
aws ec2 stop-instances --instance-id $id