ASG Time Delay

asg_time_delay.tf

# Get the time in UTC 15 minutes from now
data "external" "date" {
  # use date to get the time 15 mins from now
  program = ["bash", "${path.module}/date.sh"]
}

# Wait 15 minutes before scaling instances.
resource "aws_autoscaling_schedule" "delaystart" {
  scheduled_action_name  = "delaystart"
  min_size               = 2
  max_size               = 2
  desired_capacity       = 2
  start_time             = "${lookup(data.external.date.result,"future")}"
  autoscaling_group_name = "${aws_autoscaling_group.asg.name}"
}

date.sh

# Put this in a seperate file called date.sh

# Quit if anything fails
set -e
# Get the UTC Time in 15 minutes
FUTURE=`date -u -v +15M +"%Y-%m-%dT%H:%M:%SZ"`
# Parse it to JSON
jq -n --arg future "$FUTURE" '{"future":$future}'

requires jq to be installed on the server running terraform.