Managing the Samba AD DC Service Using an Init Script

Introduction

The following describes how to use an init script to manage the Samba Active Directory (AD) domain controller (DC) service. Depending on your operating system, the location of the init script, its content, and the procedures how to manage the service can be different. For details, see your operating system's documentation.

If you operating system uses a different system to manage services, such as systemd, see Managing the Samba AD DC Service.

Creating the Init Script

Red Hat Enterprise Linux 6

On Red Hat Enterprise Linux later than version 6, use systemd to manage the Samba service. For details, see Managing the Samba AD DC Service Using Systemd.

• Create the /etc/init.d/samba-ad-dc file with the following content:

#!/bin/bash
#
# samba-ad-dc	This shell script takes care of starting and stopping
# 		samba AD daemons.
#
# chkconfig: - 58 74
# description: Samba Active Directory Domain Controller

### BEGIN INIT INFO
# Provides: samba-ad-dc
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $network $local_fs $remote_fs
# Should-Start: $syslog $named
# Should-Stop: $syslog $named
# Short-Description: start and stop samba-ad-dc
# Description: Samba Active Directory Domain Controller
### END INIT INFO

# Source function library.
. /etc/init.d/functions
 
# Source networking configuration.
. /etc/sysconfig/network
 
prog=samba
prog_dir=/usr/local/samba/sbin/
lockfile=/var/lock/subsys/$prog
 
start() {
	[ "$NETWORKING" = "no" ] && exit 1
	echo -n $"Starting Samba AD DC: "
	daemon $prog_dir/$prog -D
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && touch $lockfile
	return $RETVAL
}

 stop() {
	[ "$EUID" != "0" ] && exit 4
	echo -n $"Shutting down Samba AD DC: "
	killproc $prog_dir/$prog
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && rm -f $lockfile
	return $RETVAL
}
 
case "$1" in
start)
	start
	;;
stop)
	stop
	;;
status)
	status $prog
	;;
restart)
	stop
	start
	;;
*)
	echo $"Usage: $0 {start|stop|status|restart}"
	exit 2
esac

• Make the script executeable:

# chmod 755 /etc/init.d/samba-ad-dc

Debian

• Create the /etc/init.d/samba-ad-dc file with the following content:

#!/bin/sh

### BEGIN INIT INFO
# Provides:          samba-ad-dc
# Required-Start:    $network $local_fs $remote_fs
# Required-Stop:     $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: start Samba daemons for the AD DC
### END INIT INFO

#
# Start/stops the Samba daemon (samba).
# Adapted from the Samba 3 packages.
#

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

PIDDIR=/usr/local/samba/var/run
SAMBAPID=$PIDDIR/samba.pid

# clear conflicting settings from the environment
unset TMPDIR

# See if the daemon and the config file are there
test -x /usr/local/samba/sbin/samba -a -r /usr/local/samba/etc/smb.conf || exit 0

. /lib/lsb/init-functions

case "$1" in
        start)
                SERVER_ROLE=`samba-tool testparm --parameter-name="server role"  2>/dev/null | tail -1`
                if [ "$SERVER_ROLE" != "active directory domain controller" ]; then
                    exit 0
                fi

                # CVE-2013-4475
                KEYFILE=/usr/local/samba/private/tls/key.pem
                if [ -e $KEYFILE ]; then
                    KEYPERMS=`stat -c %a $KEYFILE`
                    if [ "$KEYPERMS" != "600" ]; then
                        echo "wrong permission on $KEYFILE, must be 600"
                        echo "samba will not start (CVE-2013-4475)"
                        echo "Removing all tls .pem files will cause an auto-regeneration with the correct permissions."
                        exit 1
                    fi
               fi

               log_daemon_msg "Starting Samba AD DC daemon" "samba"
               # Make sure we have our PIDDIR, even if it's on a tmpfs
               install -o root -g root -m 755 -d $PIDDIR
 
               if ! start-stop-daemon --start --quiet --oknodo --exec /usr/local/samba/sbin/samba -- -D; then
                   log_end_msg 1
                   exit 1
               fi

               log_end_msg 0
               ;;
       stop)
               log_daemon_msg "Stopping Samba AD DC daemon" "samba"

              start-stop-daemon --stop --quiet --pidfile $SAMBAPID
               # Wait a little and remove stale PID file
               sleep 1
               if [ -f $SAMBAPID ] && ! ps h `cat $SAMBAPID` > /dev/null
               then
                   # Stale PID file (samba was succesfully stopped),
                   # remove it (should be removed by samba itself IMHO.)
                   rm -f $SAMBAPID
               fi

              log_end_msg 0

               ;;
       restart|force-reload)
               $0 stop
               sleep 1
               $0 start
               ;;
       status)
               status_of_proc -p $SAMBAPID /usr/local/samba/sbin/samba samba
               exit $?
               ;;
       *)
               echo "Usage: /etc/init.d/samba-ad-dc {start|stop|restart|force-reload|status}"
               exit 1
               ;;
esac

exit 0

• If necessary, update the locations to the samba service, the samba-tool utility, and the smb.conf file in the /etc/init.d/samba-ad-dc file.

• Make the script executeable:

# chmod 755 /etc/init.d/samba-ad-dc

Managing the Samba AD DC Service

The following assumes that the Samba Active Directory (AD) domain controller (DC) service is managed by the /etc/init.d/samba-ad-dc init script. If you have not created the script manually, see your operating system's documentation for the name of the Samba AD DC service.

Depending on your operating system, there can be different ways to enable or disable a service. See your operating system's documentation for details.

Enabling and Disabling the Samba AD DC Service

To enable the Samba Active Directory (AD) domain controller (DC) service to start automatically when the system boots, enter:

Red Hat Enterprise Linux 6

# chkconfig samba-ad-dc enable

To disable the automatic start of the Samba AD DC service, enter:

# chkconfig samba-ad-dc disable

Debian

# update-rc.d samba-ad-dc defaults

To disable the automatic start of the Samba AD DC service, enter:

# update-rc.d -f samba-ad-dc remove

Manually Starting and Stopping the Samba AD DC Service

To manually start the Samba Active Directory (AD) domain controller (DC) service, enter:

# service start samba-ad-dc

To manually stop the Samba AD DC service, enter:

# service stop samba-ad-dc