#!/bin/bash

# Set up MESOS_HOME in order to find projd
export MESOS_HOME=/root/mesos

# Set MESOS_PUBLIC_DNS so slaves can be linked in master web UI
export MESOS_PUBLIC_DNS=`wget -q -O - http://instance-data.ec2.internal/latest/meta-data/public-hostname`

# Set PATH to include Scala
export PATH=$PATH:/root/scala-2.8.0.final/bin

# Set HADOOP_HOME variable to allow slaves to get executors from HDFS
export HADOOP_HOME=/root/hadoop-0.20.2

ulimit -n 8192

PROGRAM=$1
shift

EXTRA_OPTS=""
if [ "$PROGRAM" == "mesos-slave" ]; then
  # Compute CPU resources (if not specified).
  if [[ "$*" != *--cpus* ]]; then
    CPUS=`grep processor /proc/cpuinfo | wc -l`
    EXTRA_OPTS="$EXTRA_OPTS --cpus=$CPUS"
  fi

  # Compute memory resources (if not specified).
  if [[ "$*" != *--mem* ]]; then
    MEM_KB=`cat /proc/meminfo | grep MemTotal | awk '{print $2}'`
    MEM=$[(MEM_KB - 1024 * 1024) / 1024]
    EXTRA_OPTS="$EXTRA_OPTS --mem=$MEM"
  fi
fi

cd $MESOS_HOME/bin
nohup ./$PROGRAM --log_dir=/mnt/mesos-logs --work_dir=/mnt/mesos-work $EXTRA_OPTS $@ </dev/null >/mnt/mesos-logs/$PROGRAM.out 2>&1 &