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#!/bin/bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific
MONITOR_CONF_DIR=/etc/ambari-metrics-monitor/conf/
METRIC_MONITOR=ambari-metrics-monitor
RESOURCE_MONITORING_DIR=/usr/lib/python2.6/site-packages/resource_monitoring
METRIC_MONITOR_PY_SCRIPT=${RESOURCE_MONITORING_DIR}/main.py
PIDFILE=/var/run/ambari-metrics-monitor/ambari-metrics-monitor.pid
OUTFILE=/var/log/ambari-metrics-monitor/ambari-metrics-monitor.out
STOP_TIMEOUT=5
OK=0
NOTOK=1
if [ -a /usr/bin/python2.7 ] && [ -z "${PYTHON}" ]; then
PYTHON=/usr/bin/python2.7
fi
if [ -a /usr/bin/python2.6 ] && [ -z "${PYTHON}" ]; then
PYTHON=/usr/bin/python2.6
fi
if [ "x$PYTHON" == "x" ]; then
PYTHON=/usr/bin/python
fi
export PYTHON=${PYTHON}
check_python_version ()
{
echo "Verifying Python version compatibility..."
majversion=`${PYTHON} -V 2>&1 | awk '{print $2}' | cut -d'.' -f1`
minversion=`${PYTHON} -V 2>&1 | awk '{print $2}' | cut -d'.' -f2`
numversion=$(( 10 * $majversion + $minversion))
if (( $numversion < 26 )); then
echo "ERROR: Found Python version $majversion.$minversion. Ambari Metric Monitor requires Python version > 2.6"
return ${NOTOK}
fi
echo "Using python " ${PYTHON}
return ${OK}
}
function write_pidfile
{
local pidfile="$1"
echo $! > "${pidfile}" 2>/dev/null
if [[ $? -gt 0 ]]; then
echo "ERROR: Cannot write pid ${pidfile}."
exit 1;
fi
}
#TODO decide if rebuild on each start (pretty quickly) to tolerate major node changes (like kernel update)
#build psutil
if [ ! "$(ls -A ${RESOURCE_MONITORING_DIR}/psutil/build)" ]; then
echo "Building psutil..."
dir=$(pwd)
cd "${RESOURCE_MONITORING_DIR}/psutil"
${PYTHON} "setup.py" "install"
cd "${dir}"
else
echo "psutil build directory is not empty, continuing..."
fi
#locate config dir
while [[ -z "${_ams_configs_done}" ]]; do
case $1 in
--config)
shift
confdir=$1
shift
if [[ -d "${confdir}" ]]; then
MONITOR_CONF_DIR="${confdir}"
elif [[ -z "${confdir}" ]]; then
echo "ERROR: No parameter provided for --config "
exit 1
else
echo "ERROR: Cannot find configuration directory \"${confdir}\""
exit 1
fi
;;
*)
_ams_configs_done=true
;;
esac
done
case "$1" in
start)
check_python_version
if [ "$?" -eq "${NOTOK}" ]; then
exit -1
fi
echo "Checking for previously running Metric Monitor..."
if [ -f ${PIDFILE} ]; then
PID=`cat ${PIDFILE}`
if [ -z "`ps ax -o pid | grep ${PID}`" ]; then
echo "${PIDFILE} found with no process. Removing ${PID}..."
rm -f ${PIDFILE}
else
tput bold
echo "ERROR: ${METRIC_MONITOR} already running"
tput sgr0
echo "Check ${PIDFILE} for PID."
exit -1
fi
fi
echo "Starting ${METRIC_MONITOR}"
nohup ${PYTHON} ${METRIC_MONITOR_PY_SCRIPT} "$@" > ${OUTFILE} 2>&1 &
PID=$!
write_pidfile ${PIDFILE}
sleep 2
echo "Verifying ${METRIC_MONITOR} process status..."
if [ -z "`ps ax -o pid | grep ${PID}`" ]; then
if [ -s ${OUTFILE} ]; then
echo "ERROR: ${METRIC_MONITOR} start failed. For more details, see ${OUTFILE}:"
echo "===================="
tail -n 10 ${OUTFILE}
echo "===================="
else
echo "ERROR: ${METRIC_MONITOR} start failed"
rm -f ${PIDFILE}
fi
echo "Monitor out at: ${OUTFILE}"
exit -1
fi
echo "Metric Monitor successfully started"
echo "Server log at: ${OUTFILE}"
;;
status)
if [ -f ${PIDFILE} ]; then
PID=`cat ${PIDFILE}`
echo "Found ${METRIC_MONITOR} PID: $PID"
if [ -z "`ps ax -o pid | grep ${PID}`" ]; then
echo "${METRIC_MONITOR} not running. Stale PID File at: $PIDFILE"
retcode=2
else
tput bold
echo "${METRIC_MONITOR} running."
tput sgr0
echo "Monitor PID at: ${PIDFILE}"
echo "Monitor out at: ${OUTFILE}"
fi
else
tput bold
echo "${METRIC_MONITOR} currently not running"
tput sgr0
echo "Usage: /usr/sbin/${METRIC_MONITOR} {start|stop|restart|status}"
retcode=3
fi
;;
stop)
pidfile=${PIDFILE}
if [[ -f "${pidfile}" ]]; then
pid=$(cat "$pidfile")
kill "${pid}" >/dev/null 2>&1
sleep "${STOP_TIMEOUT}"
if kill -0 "${pid}" > /dev/null 2>&1; then
echo "WARNING: ${METRIC_MONITOR} did not stop gracefully after ${STOP_TIMEOUT} seconds: Trying to kill with kill -9"
kill -9 "${pid}" >/dev/null 2>&1
fi
if ps -p "${pid}" > /dev/null 2>&1; then
echo "ERROR: Unable to kill ${pid}"
else
rm -f "${pidfile}" >/dev/null 2>&1
fi
fi
;;
restart)
echo -e "Restarting ${METRIC_MONITOR}"
$0 stop
$0 start "$@"
retcode=$?
;;
esac
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