compute.sh

#!/usr/bin/env bash
set -ex
DATE_FMT="%Y-%m-%dT%H:%M:%SZ"
MIN_ASG_INSTANCES=${MIN_ASG_INSTANCES:-0}
OUTPUT_KEY=${OUTPUT_KEY:=eks_compute_asg_name}

cd projects/eks-compute
ASG_NAME=$(terraform output $OUTPUT_KEY)
cd -

case $1 in
	activity)
		aws autoscaling describe-scaling-activities \
			--auto-scaling-group-name $ASG_NAME
		;;
	refresh)
		aws autoscaling start-instance-refresh \
			--auto-scaling-group-name my-asg \
			--preferences '{"InstanceWarmup": 60}'
		;;
	scale)
		instances=${2:-1}
		aws autoscaling set-desired-capacity \
			--auto-scaling-group-name $ASG_NAME \
			--desired-capacity $instances
		;;
	scale-interval)
		instances=${2:-1}
		interval=${3:-1}
		aws autoscaling put-scheduled-update-group-action \
			--auto-scaling-group-name $ASG_NAME \
			--min-size $instances \
			--scheduled-action-name eks-compute-scale-up \
			--start-time $(date -d "+5 second" -u +$DATE_FMT)
		aws autoscaling put-scheduled-update-group-action \
			--auto-scaling-group-name $ASG_NAME \
			--min-size $MIN_ASG_INSTANCES \
			--desired-capacity $MIN_ASG_INSTANCES \
			--scheduled-action-name eks-compute-scale-down \
			--start-time $(date -d "+${interval} hour" -u +$DATE_FMT)
		;;
	*)
		echo "usage: $0 <activity|refresh|scale $num_instances|scale-interval $num_instances $hours>"
		exit 1
esac