#!/usr/bin/env bash

set -eo pipefail -o nounset

function check-elb-service {
  local elb_name="${1}"

  ATTEMPTS=45
  SLEEPTIME=10
  COUNTER=1
  IN_SERVICE=0
  until [ $IN_SERVICE -ge 1 ]; do
    if [ $COUNTER -gt $ATTEMPTS ]; then exit 1; fi  # timeout after 7 1/2 minutes
    if [ $COUNTER -ne 1 ]; then sleep $SLEEPTIME; fi
    rigger-log "Waiting for ELB (${elb_name}) to see an instance in InService..."
    IN_SERVICE=$(aws elb describe-instance-health \
                         --load-balancer-name "${elb_name}" \
                         --query 'length(InstanceStates[?State==`InService`])')
  done
}

check-elb-service "${ELB_NAME}"