AWS: CLI for starting/stopping kops clusters

#/bin/sh

AWS_PROFILE=<region>
AWS_DEFAULT_REGION=<region>


if [[ $1 = "start" ]]; then
    # The additional star at the end of the line avoids the \n at the end of the $desired variable
	aws autoscaling describe-auto-scaling-groups --query 'AutoScalingGroups[?Tags[?Key=='\''Owner'\'' && Value=='\''kops'\'']].[AutoScalingGroupName,MinSize,MaxSize,DesiredCapacity,'\''*'\'']' --output text | while IFS= read -r line
	do
		read -r name min max desired _<<< "$line"
		if [[ $desired -eq 0 ]] ; then
			printf "Raising autoscaling %s to %s.\n" "$name" "$max"
			aws autoscaling set-desired-capacity --auto-scaling-group-name $name --desired-capacity $max
		fi
	done
elif [[ $1 = "stop" ]]; then
	aws autoscaling describe-auto-scaling-groups --query 'AutoScalingGroups[?Tags[?Key=='\''Owner'\'' && Value=='\''kops'\'']].[AutoScalingGroupName,MinSize,MaxSize,DesiredCapacity,'\''*'\'']' --output text | while IFS= read -r line
	do
		read -r name min max desired _<<< "$line"
		if [[ $desired -eq 0 ]] ; then
			printf "Stopping autoscaling %s.\n" "$name" "$max"
			aws autoscaling update-auto-scaling-group --auto-scaling-group-name $name --min-size 0
			aws autoscaling set-desired-capacity --auto-scaling-group-name $name --desired-capacity 0
		fi
	done
fi