haproxywrapper

#!/bin/bash
# borrows from https://gist.github.com/gfrey/8472007 and
# https://github.com/dynport/urknall/blob/master/examples/tpl_haproxy.go#L44.

if [ $# -ne 2 ]; then
  echo "Please provide pid_path and config_path"
  exit 1
fi

function starthaproxy {
  haproxy -p $pid_path -f $config_path -D
}

function reloadhaproxy {
  if [[ -s $pid_path ]]; then
    haproxy -p $pid_path -f $config_path -D -sf $(cat $pid_path)
  else
    echo "Pid file $pid_path does't exist or is empty."
  fi
}

function stophaproxy {
  if [[ -s $pid_path ]]; then
    kill -TERM `cat $pid_path`
    kill_return=$?
    rm -f $pid_path
    exit $kill_return
  else
    echo "Pid file $pid_path does't exist or is empty."
    exit 1
  fi
}

pid_path=$1
config_path=$2
starthaproxy $pid_path $config_path

trap "reloadhaproxy" SIGHUP
trap "stophaproxy" EXIT

while true; do sleep 0.2; done