haproxy systemd notify sigterm test

#!/bin/bash
set -e

function mainpid() {
  systemctl show --property MainPID haproxy | cut -d= -f2
}

while sleep 0.15; do

  OLDPID=$(mainpid)

  echo "Stopping haproxy"
  kill "$OLDPID" || true

  while true; do
    sleep 0.15
    PID=$(mainpid)
    if (( PID != OLDPID || PID == 0 )); then
      break
    else
      echo "waiting"
    fi
  done

  while ! systemctl is-active --quiet haproxy; do
    echo "Starting haproxy"
    systemctl start haproxy || true
  done
done