rattail-fabric/rattail_fabric/deploy/check-rattail-daemon

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#!/bin/sh
################################################################################
#
# Rattail -- Retail Software Framework
# Copyright © 2010-2018 Lance Edgar
#
# This file is part of Rattail.
#
# Rattail is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# Rattail. If not, see <http://www.gnu.org/licenses/>.
#
################################################################################
#
# This is a simple script which will output a single line of info, and exit
# with a return code which indicates status of a given Rattail daemon. It was
# designed for use with Shinken monitoring. Invoke like so:
#
# check-rattail-daemon NAME
#
# Where NAME refers to the service, e.g. 'rattail-datasync'. Exit code may be:
#
# * 0 = daemon is confirmed running
# * 2 = daemon is confirmed *not* running
# * 3 = unknown state
#
################################################################################
NAME="$1"
if [ "$NAME" = "" ]; then
echo "Usage: check-rattail-daemon NAME"
exit 3
fi
PIDFILE="/var/run/rattail/$NAME.pid"
if [ ! -f "$PIDFILE" ]; then
echo "PID file not found: $PIDFILE"
exit 2
fi
PID=`cat $PIDFILE`
if [ "$PID" = "" ]; then
echo "File exists but contains no PID: $PIDFILE"
exit 3
fi
ps -p $PID >/dev/null
if [ ! $? ]; then
echo "No process found for PID $PID; per file: $PIDFILE"
exit 2
fi
echo "Rattail daemon $NAME is running with PID $PID"
exit 0