easy ec2 start|stop script

instances_ctrl.sh

#!/bin/bash

MODE=$1

#get_instances() {
	#aws ec2 describe-instances --filter "Name=instance-state-name,Values=${STATE}" "Name=tag:Environment,Values=development" | jq -r '.Reservations[].Instances[] | [ .InstanceId, (.Tags[] | select(.Key == "Name").Value) ] | @csv'
	#aws ec2 describe-instances --filter "Name=instance-state-name,Values=${state}" "Name=tag:Environment,Values=development" | jq -r '.Reservations[].Instances[] | .InstanceId'
#}


describe_instances() {
	aws ec2 describe-instances | jq -r '.Reservations[].Instances[] | [ .InstanceId, (.Tags[] | select(.Key == "Name").Value), .State.Name ] | @tsv'
}

_instances_ctrl() {

	if [ $MODE = "start" ]; then
		instance_ids=$(describe_instances | perl -lae 'print $F[0] if $F[2] eq "stopped"')
		check_state="running"
	fi
	if [ $MODE = "stop" ]; then
		instance_ids=$(describe_instances | perl -lae 'print $F[0] if $F[2] eq "running"')
		check_state="stopped"
	fi
	if [ -z "${instance_ids}" ]; then
		echo "target instances are not exists."
		return
	fi
	echo "$instance_ids" | xargs --no-run-if-empty  aws ec2 ${MODE}-instances --instance-ids
	echo "$instance_ids" | while read instance_id; do
		while true; do
			current_state=$(aws ec2 describe-instances --instance-ids $instance_id | jq -r '.Reservations[].Instances[] | .State.Name')
			if [ $current_state = $check_state ]; then
				echo "$instance_id is $check_state."
				break
			fi
			sleep 1
		done
	done
}

case "$MODE" in
	"describe" )
		describe_instances ;;
	"start" | "stop" )
		_instances_ctrl ;;
	* )
		echo "usage: $0 [describe|stop|start]"; exit 1;;
esac