Coredns service daemon script, rename it to croedns , and move to /etc/init.d

coredns.sh

#! /bin/bash
# /etc/init.d/coredns: start the coredns daemon.

# description: coredns
CORE_DNS_HOME=/usr/local/bin
CORE_DNS_BIN=$CORE_DNS_HOME/coredns

CORE_DNS_PIDFILE=/var/run/coredns.pid
CORE_DNS_CONSOLE_DIR=/tmp
CORE_DNS_CONSOLE_LOG=${CORE_DNS_CONSOLE_DIR}/coredns.log

PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin

prog=coredns
DESC="coredns daemon"

RETVAL=0
STARTUP_WAIT=30
SHUTDOWN_WAIT=30

mkdir -p $(dirname $CORE_DNS_PIDFILE)

# Source function library.
. /lib/lsb/init-functions
DATE=$(date '+%Y-%m-%d %H:%M:%S')
start() {
    echo -n $"${DATE} Starting $prog: "

  # Create pid file
    if [ -f $CORE_DNS_PIDFILE ]; then
        read ppid < $CORE_DNS_PIDFILE
        if [ $(ps --pid $ppid 2> /dev/null | grep -c $ppid 2> /dev/null) -eq '1' ]; then
            echo -n "$prog is already running"
            log_failure_msg "[failure]"
            echo
            return 1
        else
            rm -f $CORE_DNS_PIDFILE
        fi
    fi



    # Run daemon
    cd $CORE_DNS_HOME
    nohup $CORE_DNS_BIN -conf $CORE_DNS_HOM/Corefile > $CORE_DNS_CONSOLE_LOG 2>&1 &
    echo $! > $CORE_DNS_PIDFILE

    count=0
    launched=false
    sleep 1
  
    until [ $count -gt $STARTUP_WAIT ]
    do
        read ppid < $CORE_DNS_PIDFILE
        if [ $(ps --pid $ppid 2> /dev/null | grep -c $ppid 2> /dev/null) -eq '1' ] ; then
            launched=true
            break
        fi
        sleep 1
        let count=$count+1;
    done
    if [ $launched = 'true' ] ; then
        log_success_msg "[OK]"
    else
        log_failure_msg "[failure]"
    fi
    echo
    return 0
}

stop() {
    echo -n $"${DATE} Stopping $prog: "
    read ppid < $CORE_DNS_PIDFILE
    kill -9 $ppid

    if [ $(ps --pid $ppid 2> /dev/null | grep -c $ppid 2> /dev/null) -eq '1' ] ; then
        log_failure_msg "[failure]"
    else
        rm -rf $CORE_DNS_PIDFILE
        log_success_msg "[OK]"
    fi
    echo
}

reload() {
    stop
    start
}

restart() {
    stop
    start
}

status() {
    if [ -f $CORE_DNS_PIDFILE ]; then
        read ppid < $CORE_DNS_PIDFILE
        if [ $(ps --pid $ppid 2> /dev/null | grep -c $ppid 2> /dev/null) -eq '1' ]; then
            echo "$prog is running (pid $ppid)"
            return 0
        else
            echo "$prog dead but pid file exists"
            return 1
        fi
    fi
    echo "$prog is not running"
    return 3
}

case "$1" in
start)
    start
    ;;

stop)
    stop
    ;;

reload)
    reload
    ;;

restart)
    restart
    ;;

status)
    status
    ;;
*)

echo $"Usage: $0 {start|stop|reload|restart|status}"
exit 1
esac

exit $?