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@weldpua2008
Created August 15, 2018 06:04
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Example init script for Go Service (SystemV)
#!/bin/sh
#
# GO - this script starts and stops the Event server daemon
#
# chkconfig: 345 85 15
# description: GO - server written in golang
# processname: go
# config: /config/go.json
# pidfile: /var/run/go.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
go="/bin/go-server"
prog=$(basename $go)
pidfile=/var/run/go.pid
GO_USER="flume"
CONF_FILE="/config/go.json"
if [ -f /proc/cpuinfo ]; then
threads=$(cat /proc/cpuinfo | grep -i 'core id' | wc -l)
elif [ -d /System/Library ]; then
threads=$(sysctl machdep.cpu.thread_count | cut -f2 -d\ )
else
threads=8
fi
[[ ${threads} -gt 1 ]] && threads=$((threads / 5))
[[ ${threads} -ge 1 ]] || threads=1
GOMAXPROCS="${threads:-1}"
[ -f /etc/sysconfig/go ] && . /etc/sysconfig/go
lockfile=/var/lock/subsys/go.events
start() {
if [ ! -x $go ];then
failure $"$go has not permissions"
exit 5
fi
if [ ! -e "$CONF_FILE" ];then
failure $"$CONF_FILE is not exist"
exit 6
fi
echo -n $"Starting $prog: "
runuser -s /bin/bash ${GO_USER} -c "GOMAXPROCS=${GOMAXPROCS:-10} $go -c $CONF_FILE" >/dev/null 2>&1 &
retval=$?
_pid=$!
if [ $retval -eq 0 ];then
touch $lockfile
mkdir -p $(dirname "$pidfile")
[ "$_pid" != "" ] && echo "$_pid" > $pidfile
success $"$prog startup"
else
failure $"exit code $retval"
fi
echo
return $retval
}
stop() {
echo -n $"Stopping $prog: "
declare -f checkpid &> /dev/null && _checkpid_exist="true" || _checkpid_exist="false"
retval=$?
checkpid $(cat "$pidfile" 2> /dev/null)
if [[ $? -eq 0 ]] || [[ "${_checkpid_exist:-false}" = "false" ]];then
killproc -p $pidfile $go -QUIT
retval=$?
fi
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
configtest || return $?
stop
sleep 3
start
}
force_reload() {
restart
}
configtest() {
RETVAL=1
echo -n $"Checking $CONF_FILE: "
if [[ -e "$CONF_FILE" ]];then
cat "$CONF_FILE" 2> /dev/null | jq . &> /dev/null
RETVAL=$?
fi
return $RETVAL
}
rh_status() {
status -p $pidfile $go
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit 2
esac
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