[Samba] ctdb event script 50.samba does not start smbd

Fri Aug 15 04:40:48 MDT 2014

Ubuntu 14.04. 2 node ctdb in an 4.1.11 AD domain with 4.1.11 member
servers on each node. winbindd is present but nss and pam are controlled
by sssd. All OK, except that the event script which starts samba is not
working.

smb.conf
[global]
workgroup = ALTEA
realm = ALTEA.SITE
security = ADS
kerberos method = secrets and keytab
netbios name = SMBCLUSTER
clustering = Yes
ctdbd socket = /usr/local/var/run/ctdb/ctdbd.socket
[users]
path = /cluster/users
read only = No

starting ctdbd
sudo ctdbd --dbdir=/usr/local/var/lib/ctdb
--dbdir-persistent=/usr/local/var/lib/ctdb/persistent
--event-script-dir=/usr/local/etc/ctdb/events.d
--public-addresses=/usr/local/etc/ctdb/public_addresses
--socket=/usr/local/var/run/ctdb/ctdbd.socket --logfile=/var/log/syslog

Here is the service script copied from the samba wiki. It is installed
chmod + x'd at /etc/init.d/smbd. It works fine manually:

#!/bin/sh
RUN_MODE="daemons"
[ -r /etc/default/samba ] && . /etc/default/samba
PIDDIR=/usr/local/samba/var/run
NMBDPID=$PIDDIR/nmbd.pid
SMBDPID=$PIDDIR/smbd.pid
unset TMPDIR
test -x /usr/local/samba/sbin/nmbd -a -x /usr/local/samba/sbin/smbd ||
exit
. /lib/lsb/init-functions
case "$1" in
        start)
                log_daemon_msg "Starting Samba daemons"
                install -o root -g root -m 755 -d $PIDDIR
                NMBD_DISABLED=`testparm -s --parameter-name='disable
netbios' 2>/dev/null`
                if [ "$NMBD_DISABLED" != 'Yes' ]; then
                        log_progress_msg "nmbd"
                        if ! start-stop-daemon --start --quiet --oknodo
--exec /usr/local/samba/sbin/nmbd -- -D
                        then
                                log_end_msg 1
                                exit 1
                        fi
                fi

           if [ "$RUN_MODE" != "inetd" ]; then
                        log_progress_msg "smbd"
                        if ! start-stop-daemon --start --quiet --oknodo
--exec /usr/local/samba/sbin/smbd -- -D
                	 then
                                log_end_msg 1
                                exit 1
                        fi
                fi

                log_end_msg 0
                ;;
        stop)
                log_daemon_msg "Stopping Samba daemons"
                log_progress_msg "nmbd"

                start-stop-daemon --stop --quiet --pidfile $NMBDPID
                sleep 1
                if [ -f $NMBDPID ] && ! ps h `cat $NMBDPID` > /dev/null
                then
                        rm -f $NMBDPID
                fi 

                if [ "$RUN_MODE" != "inetd" ]; then
                        log_progress_msg "smbd"
                        start-stop-daemon --stop --quiet --pidfile
$SMBDPID
                        sleep 1
                        if [ -f $SMBDPID ] && ! ps h `cat $SMBDPID`
>/dev/null
                        then
                                rm -f $SMBDPID
                        fi
                fi

                log_end_msg 0

                ;;

     reload)
                log_daemon_msg "Reloading /usr/local/samba/etc/smb.conf"
"smbd only"

                start-stop-daemon --stop --signal HUP --pidfile $SMBDPID

                log_end_msg 0
                ;;
        restart|force-reload)
                $0 stop
                sleep 1
                $0 start
                ;;
        status)
                status="0"
                NMBD_DISABLED=`testparm -s --parameter-name='disable
netbios' 2>/dev/null`
                if [ "$NMBD_DISABLED" != "Yes" ]; then
                        status_of_proc -p $NMBDPID
/usr/local/samba/sbin/nmbd nmbd || status=$?
                fi
                if [ "$RUN_MODE" != "inetd" ]; then
                        status_of_proc -p $SMBDPID
/usr/local/samba/sbin/smbd smbd || status=$?
                fi
                if [ "$NMBD_DISABLED" = "Yes" -a "$RUN_MODE" = "inetd"
];
then
                        status="4"
                fi
                exit $status
                ;;
        *)
                echo "Usage: /etc/init.d/smbd{start|stop|reload|restart|
force-reload|status}"
                exit 1
                ;;
esac
exit 0

Here is the event script. We got as far as changing samba to smbd for
debian as we're on Ubuntu.

/usr/local/etc/ctdb/events.d/50.samba (marked executable)

#!/bin/sh
# ctdb event script for Samba

[ -n "$CTDB_BASE" ] || \
    export CTDB_BASE=$(cd -P $(dirname "$0") ; dirname "$PWD")

. $CTDB_BASE/functions

detect_init_style

case $CTDB_INIT_STYLE in
	suse)
		CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
		CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-nmb}
		;;
	debian)
		CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smbd} ##changed to smbd here
		#CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
		;;
	*)
		# Use redhat style as default:
		CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
		CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
		;;
esac

service_name="samba"

loadconfig

ctdb_setup_service_state_dir

service_start ()
{
    # make sure samba is not already started
    service "$CTDB_SERVICE_SMB" stop > /dev/null 2>&1
    if [ -n "$CTDB_SERVICE_NMB" ] ; then
	service "$CTDB_SERVICE_NMB" stop > /dev/null 2>&1
    fi
    killall -0 -q smbd && {
	sleep 1
	# make absolutely sure samba is dead
	killall -q -9 smbd
    }
    killall -0 -q nmbd && {
	sleep 1
	# make absolutely sure samba is dead
	killall -q -9 nmbd
    }

    # start Samba service. Start it reniced, as under very heavy load
    # the number of smbd processes will mean that it leaves few cycles
    # for anything else
    net serverid wipe

    if [ -n "$CTDB_SERVICE_NMB" ] ; then
	nice_service "$CTDB_SERVICE_NMB" start || die "Failed to start nmbd"
    fi

    nice_service "$CTDB_SERVICE_SMB" start || die "Failed to start
samba"
}

service_stop ()
{
    service "$CTDB_SERVICE_SMB" stop
    if [ -n "$CTDB_SERVICE_NMB" ] ; then
	service "$CTDB_SERVICE_NMB" stop
    fi
}

######################################################################
# Show the testparm output using a cached smb.conf to avoid delays due
# to registry access.

smbconf_cache="$service_state_dir/smb.conf.cache"

testparm_foreground_update ()
{
    _timeout="$1"

    if ! _out=$(timeout $_timeout testparm -v -s 2>/dev/null) ; then
	if [ -f "$smbconf_cache" ] ; then
	    echo "WARNING: smb.conf cache update failed - using old cache file"
	    return 1
	else
	    die "ERROR: smb.conf cache create failed"
	fi
    fi

    _tmpfile="${smbconf_cache}.$$"
    # Patterns to exclude...
    pat='^[[:space:]]+(registry[[:space:]]+shares|include|copy|
winbind[[:space:]]+separator)[[:space:]]+='    
    echo "$_out" | grep -Ev "$pat" >"$_tmpfile"
    mv "$_tmpfile" "$smbconf_cache" # atomic

    return 0
}

testparm_background_update ()
{
    _timeout="$1"

    testparm_foreground_update $_timeout >/dev/null 2>&1 </dev/null &
}

testparm_cat ()
{
    testparm -s "$smbconf_cache" "$@" 2>/dev/null
}

list_samba_shares ()
{
    testparm_cat |
    sed -n -e 's@^[[:space:]]*path[[:space:]]*=[[:space:]]@@p' |
    sed -e 's/"//g'
}

list_samba_ports ()
{
    testparm_cat --parameter-name="smb ports" |
    sed -e 's@,@ @g'
}

###########################

ctdb_start_stop_service

is_ctdb_managed_service || exit 0

###########################

case "$1" in
     startup)
	ctdb_service_start
	;;

     shutdown)
	ctdb_service_stop
	;;

     monitor)
	testparm_foreground_update 10
	ret=$?

	smb_ports="$CTDB_SAMBA_CHECK_PORTS"
	if [ -z "$smb_ports" ] ; then
	    smb_ports=$(list_samba_ports)
	    [ -n "$smb_ports" ] || die "Failed to set smb ports"
	fi
	ctdb_check_tcp_ports $smb_ports || exit $?

	if [ "$CTDB_SAMBA_SKIP_SHARE_CHECK" != "yes" ] ; then
	    list_samba_shares | ctdb_check_directories || exit $?
	fi

	if [ $ret -ne 0 ] ; then
	    testparm_background_update 10
	fi
	;;

    *)
	ctdb_standard_event_handler "$@"
	;;
esac
exit 0

We got as far as changing samba to smbd.

1. smbd is not started on calling ctdbd
2. What is supposed to happen to smbd when we start ctdb
3. What's the best way to stop nmbd starting? (we're in AD)

Thanks,
Steve