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samba-mirror/ctdb/config/events.d/50.samba
Martin Schwenke 96066d8816 Revert "events/50.samba: only use wbinfo --ping-dc if available"
This reverts commit 7b73834ba3ac197cc8a3020c111f9bb2c567e70b.

wbinfo --ping-dc is proving too unreliable.

(This used to be ctdb commit 178f429a7b6d1008d35e857b6ca1df6adb60d255)
2010-01-12 21:02:11 +11:00

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#!/bin/sh
# ctdb event script for Samba
. $CTDB_BASE/functions
detect_init_style
case $CTDB_INIT_STYLE in
suse)
CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-nmb}
CTDB_SERVICE_WINBIND=${CTDB_SERVICE_WINBIND:-winbind}
;;
debian)
CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-samba}
CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
CTDB_SERVICE_WINBIND=${CTDB_SERVICE_WINBIND:-winbind}
;;
*)
# should not happen, but for now use redhat style as default:
CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
CTDB_SERVICE_WINBIND=${CTDB_SERVICE_WINBIND:-winbind}
;;
esac
service_name="samba"
service_start="start_samba"
service_stop="stop_samba"
loadconfig
[ "$CTDB_MANAGES_SAMBA" = "yes" ] || [ "$CTDB_MANAGES_WINBIND" = "yes" ] || exit 0
start_samba() {
# create the state directory for samba
/bin/mkdir -p $CTDB_BASE/state/samba
# make sure samba is not already started
[ "$CTDB_MANAGES_SAMBA" = "yes" ] && {
service "$CTDB_SERVICE_SMB" stop > /dev/null 2>&1
service "$CTDB_SERVICE_NMB" stop > /dev/null 2>&1
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
}
}
# restart the winbind service
check_ctdb_manages_winbind
[ "$CTDB_MANAGES_WINBIND" = "yes" ] && {
service "$CTDB_SERVICE_WINBIND" stop > /dev/null 2>&1
killall -0 -q winbindd && {
sleep 1
# make absolutely sure winbindd is dead
killall -q -9 winbindd
}
service "$CTDB_SERVICE_WINBIND" start
}
# start Samba service. Start it reniced, as under very heavy load
# the number of smbd processes will mean that it leaves few cycles for
# anything else
[ "$CTDB_MANAGES_SAMBA" = "yes" ] && {
nice_service "$CTDB_SERVICE_NMB" start
nice_service "$CTDB_SERVICE_SMB" start
}
}
stop_samba() {
# shutdown Samba when ctdb goes down
[ "$CTDB_MANAGES_SAMBA" = "yes" ] && {
service "$CTDB_SERVICE_SMB" stop
service "$CTDB_SERVICE_NMB" stop
}
# stop the winbind service
check_ctdb_manages_winbind
[ "$CTDB_MANAGES_WINBIND" = "yes" ] && {
service "$CTDB_SERVICE_WINBIND" stop
}
}
# set default samba cleanup period - in minutes
[ -z "$SAMBA_CLEANUP_PERIOD" ] && {
SAMBA_CLEANUP_PERIOD=10
}
# we keep a cached copy of smb.conf here
smbconf_cache="$CTDB_BASE/state/samba/smb.conf.cache"
#############################################
# update the smb.conf cache in the foreground
testparm_foreground_update() {
mkdir -p "$CTDB_BASE/state/samba" || exit 1
testparm -s 2> /dev/null | egrep -v 'registry.shares.=|include.=' > "$smbconf_cache"
}
#############################################
# update the smb.conf cache in the background
testparm_background_update() {
# if the cache doesn't exist, then update in the foreground
[ -f $smbconf_cache ] || {
testparm_foreground_update
}
# otherwise do a background update
(
tmpfile="${smbconf_cache}.$$"
testparm -s > $tmpfile 2> /dev/null &
# remember the pid of the teamparm process
pid="$!"
# give it 10 seconds to run
timeleft=10
while [ $timeleft -gt 0 ]; do
timeleft=$(($timeleft - 1))
# see if the process still exists
/bin/kill -0 $pid > /dev/null 2>&1 || {
# it doesn't exist, grab its exit status
wait $pid
[ $? = 0 ] || {
echo "50.samba: smb.conf background update exited with status $?"
rm -f "${tmpfile}"
exit 1
}
# put the new smb.conf contents in the cache (atomic rename)
# make sure we remove references to the registry while doing
# this to ensure that running testparm on the cache does
# not use the registry
egrep -v 'registry.shares.=|include.=' < "$tmpfile" > "${tmpfile}.2"
rm -f "$tmpfile"
mv -f "${tmpfile}.2" "$smbconf_cache" || {
echo "50.samba: failed to update background cache"
rm -f "${tmpfile}.2"
exit 1
}
exit 0
}
# keep waiting for testparm to finish
sleep 1
done
# it took more than 10 seconds - kill it off
rm -f "${tmpfile}"
/bin/kill -9 "$pid" > /dev/null 2>&1
echo "50.samba: timed out updating smbconf cache in background"
exit 1
) &
}
##################################################
# show the testparm output using a cached smb.conf
# to avoid registry access
testparm_cat() {
[ -f $smbconf_cache ] || {
testparm_foreground_update
}
testparm -s "$smbconf_cache" "$@" 2>/dev/null
}
# function to see if ctdb manages winbind
check_ctdb_manages_winbind() {
[ -z "$CTDB_MANAGES_WINBIND" ] && {
secmode=`testparm_cat --parameter-name=security`
case $secmode in
ADS|DOMAIN)
CTDB_MANAGES_WINBIND="yes";
;;
*)
CTDB_MANAGES_WINBIND="no";
;;
esac
}
}
list_samba_shares ()
{
testparm_cat |
sed -n -e 's@^[[:space:]]*path[[:space:]]*=[[:space:]]@@p' |
sed -e 's/"//g'
}
###########################
# periodic cleanup function
periodic_cleanup() {
# running smbstatus scrubs any dead entries from the connections
# and sessionid database
# echo "Running periodic cleanup of samba databases"
smbstatus -np > /dev/null 2>&1 &
}
case "$1" in
startup)
ctdb_service_start
;;
shutdown)
ctdb_service_stop
;;
monitor)
# Create a dummy file to track when we need to do periodic cleanup
# of samba databases
[ -f $CTDB_BASE/state/samba/periodic_cleanup ] || {
touch $CTDB_BASE/state/samba/periodic_cleanup
}
[ `/usr/bin/find $CTDB_BASE/state/samba/periodic_cleanup -mmin +$SAMBA_CLEANUP_PERIOD | wc -l` -eq 1 ] && {
# Cleanup the databases
periodic_cleanup
touch $CTDB_BASE/state/samba/periodic_cleanup
}
[ "$CTDB_MANAGES_SAMBA" = "yes" ] && {
[ "$CTDB_SAMBA_SKIP_SHARE_CHECK" = "yes" ] || {
testparm_background_update
testparm_cat | egrep '^WARNING|^ERROR|^Unknown' && {
testparm_foreground_update
testparm_cat | egrep '^WARNING|^ERROR|^Unknown' && {
echo "ERROR: testparm shows smb.conf is not clean"
exit 1
}
}
list_samba_shares |
ctdb_check_directories_probe || {
testparm_foreground_update
list_samba_shares |
ctdb_check_directories
} || exit $?
}
smb_ports="$CTDB_SAMBA_CHECK_PORTS"
[ -z "$smb_ports" ] && {
smb_ports=`testparm_cat --parameter-name="smb ports"`
}
ctdb_check_tcp_ports $smb_ports || exit $?
}
# check winbind is OK
check_ctdb_manages_winbind
[ "$CTDB_MANAGES_WINBIND" = "yes" ] && {
ctdb_check_command "winbind" "wbinfo --ping-dc"
}
;;
*)
ctdb_standard_event_handler "$@"
;;
esac
exit 0