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samba-mirror/ctdb/config/ctdb.init
Martin Schwenke 27a5b78c8e initscript: Look for tdbtool/tdbdump using which, not in fixed locations
Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit c74cc0442eb90d859eae270b59456d28605817c4)
2013-05-06 15:40:30 +10:00

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#!/bin/sh
#
##############################
# ctdb: Starts the clustered tdb daemon
#
# chkconfig: - 90 01
#
# description: Starts and stops the clustered tdb daemon
# pidfile: /var/run/ctdb/ctdbd.pid
#
### BEGIN INIT INFO
# Provides: ctdb
# Required-Start: $network
# Required-Stop: $network
# Default-Stop:
# Default-Start: 3 5
# Short-Description: start and stop ctdb service
# Description: initscript for the ctdb service
### END INIT INFO
# Source function library.
if [ -f /etc/init.d/functions ] ; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
fi
[ -f /etc/rc.status ] && {
. /etc/rc.status
rc_reset
LC_ALL=en_US.UTF-8
}
if [ -f /lib/lsb/init-functions ] ; then
. /lib/lsb/init-functions
fi
# Avoid using root's TMPDIR
unset TMPDIR
[ -z "$CTDB_BASE" ] && {
export CTDB_BASE="/etc/ctdb"
}
. $CTDB_BASE/functions
loadconfig network
loadconfig ctdb
# check networking is up (for redhat)
[ "$NETWORKING" = "no" ] && exit 0
detect_init_style
export CTDB_INIT_STYLE
ctdbd=${CTDBD:-/usr/sbin/ctdbd}
pidfile="/var/run/ctdb/ctdbd.pid"
if [ "$CTDB_VALGRIND" = "yes" ]; then
init_style="valgrind"
else
init_style="$CTDB_INIT_STYLE"
fi
build_ctdb_options () {
maybe_set () {
# If the 2nd arg is null then return - don't set anything.
# Else if the 3rd arg is set and it doesn't match the 2nd arg
# then return
[ -z "$2" -o \( -n "$3" -a "$3" != "$2" \) ] && return
val="'$2'"
case "$1" in
--*) sep="=" ;;
-*) sep=" " ;;
esac
# For these options we're only passing a value-less flag.
[ -n "$3" ] && {
val=""
sep=""
}
CTDB_OPTIONS="${CTDB_OPTIONS}${CTDB_OPTIONS:+ }${1}${sep}${val}"
}
[ -z "$CTDB_RECOVERY_LOCK" ] && {
echo "No recovery lock specified. Starting CTDB without split brain prevention"
}
maybe_set "--reclock" "$CTDB_RECOVERY_LOCK"
mkdir -p $(dirname "$pidfile")
maybe_set "--pidfile" "$pidfile"
# build up CTDB_OPTIONS variable from optional parameters
maybe_set "--logfile" "$CTDB_LOGFILE"
maybe_set "--nlist" "$CTDB_NODES"
maybe_set "--socket" "$CTDB_SOCKET"
maybe_set "--public-addresses" "$CTDB_PUBLIC_ADDRESSES"
maybe_set "--public-interface" "$CTDB_PUBLIC_INTERFACE"
maybe_set "--dbdir" "$CTDB_DBDIR"
maybe_set "--dbdir-persistent" "$CTDB_DBDIR_PERSISTENT"
maybe_set "--event-script-dir" "$CTDB_EVENT_SCRIPT_DIR"
maybe_set "--transport" "$CTDB_TRANSPORT"
maybe_set "-d" "$CTDB_DEBUGLEVEL"
maybe_set "--notification-script" "$CTDB_NOTIFY_SCRIPT"
maybe_set "--start-as-disabled" "$CTDB_START_AS_DISABLED" "yes"
maybe_set "--start-as-stopped " "$CTDB_START_AS_STOPPED" "yes"
maybe_set "--no-recmaster" "$CTDB_CAPABILITY_RECMASTER" "no"
maybe_set "--no-lmaster" "$CTDB_CAPABILITY_LMASTER" "no"
maybe_set "--lvs --single-public-ip" "$CTDB_LVS_PUBLIC_IP"
maybe_set "--script-log-level" "$CTDB_SCRIPT_LOG_LEVEL"
maybe_set "--log-ringbuf-size" "$CTDB_LOG_RINGBUF_SIZE"
maybe_set "--syslog" "$CTDB_SYSLOG" "yes"
maybe_set "--max-persistent-check-errors" "$CTDB_MAX_PERSISTENT_CHECK_ERRORS"
}
export_debug_variables ()
{
export CTDB_DEBUG_HUNG_SCRIPT CTDB_EXTERNAL_TRACE
}
# Log given message or stdin to either syslog or a CTDB log file
do_log ()
{
script_log "ctdb.init" "$@"
}
select_tdb_checker ()
{
# Find the best TDB consistency check available.
use_tdb_tool_check=false
if which tdbtool >/dev/null 2>&1 && \
echo "help" | tdbtool | grep -q check ; then
use_tdb_tool_check=true
elif which tdbtool >/dev/null 2>&1 && which tdbdump >/dev/null 2>&1 ; then
do_log <<EOF
WARNING: The installed 'tdbtool' does not offer the 'check' subcommand.
Using 'tdbdump' for database checks.
Consider updating 'tdbtool' for better checks!
EOF
elif which tdbdump >/dev/null 2>&1 ; then
do_log <<EOF
WARNING: 'tdbtool' is not available.
Using 'tdbdump' to check the databases.
Consider installing a recent 'tdbtool' for better checks!
EOF
else
do_log <<EOF
WARNING: Cannot check databases since neither
'tdbdump' nor 'tdbtool check' is available.
Consider installing tdbtool or at least tdbdump!
EOF
return 1
fi
}
check_tdb ()
{
_db="$1"
if $use_tdb_tool_check ; then
# tdbtool always exits with 0 :-(
if tdbtool "$_db" check 2>/dev/null |
grep -q "Database integrity is OK" ; then
return 0
else
return 1
fi
else
tdbdump "$_db" >/dev/null 2>/dev/null
return $?
fi
}
check_persistent_databases ()
{
_dir="${CTDB_DBDIR_PERSISTENT:-${CTDB_DBDIR:-/var/ctdb}/persistent}"
mkdir -p "$_dir" 2>/dev/null
[ "${CTDB_MAX_PERSISTENT_CHECK_ERRORS:-0}" = "0" ] || return 0
for _db in $(ls "$_dir/"*.tdb.*[0-9] 2>/dev/null) ; do
check_tdb $_db || {
do_log "Persistent database $_db is corrupted! CTDB will not start."
return 1
}
done
}
check_non_persistent_databases ()
{
_dir="${CTDB_DBDIR:-/var/ctdb}"
mkdir -p "$_dir" 2>/dev/null
for _db in $(ls "${_dir}/"*.tdb.*[0-9] 2>/dev/null) ; do
check_tdb $_db || {
_backup="${_db}.$(date +'%Y%m%d.%H%M%S.%N').corrupt"
do_log <<EOF
WARNING: database ${_db} is corrupted.
Moving to backup ${_backup} for later analysis.
EOF
mv "$_db" "$_backup"
# Now remove excess backups
ls -td "${_db}."*".corrupt" |
tail -n +$((${CTDB_MAX_CORRUPT_DB_BACKUPS:-10} + 1)) |
xargs rm -f
}
done
}
set_retval() {
return $1
}
wait_until_ready () {
_timeout="${1:-10}" # default is 10 seconds
_count=0
while ! ctdb ping >/dev/null 2>&1 ; do
if [ $_count -ge $_timeout ] ; then
return 1
fi
sleep 1
_count=$(($_count + 1))
done
}
start() {
echo -n $"Starting ctdbd service: "
ctdb ping >/dev/null 2>&1 && {
echo $"CTDB is already running"
return 0
}
# About to start new $ctdbd. The ping above has failed and any
# new $ctdbd will destroy the Unix domain socket, so any processes
# that aren't yet completely useless soon will be... so kill
# them.
pkill -9 -f "$ctdbd"
build_ctdb_options
export_debug_variables
# make sure we drop any ips that might still be held if previous
# instance of ctdb got killed with -9 or similar
drop_all_public_ips "ctdb.init"
if select_tdb_checker ; then
check_persistent_databases || return $?
check_non_persistent_databases
fi
if [ "$CTDB_SUPPRESS_COREFILE" = "yes" ]; then
ulimit -c 0
else
ulimit -c unlimited
fi
case $init_style in
valgrind)
eval valgrind -q --log-file=/var/log/ctdb_valgrind \
$ctdbd --valgrinding "$CTDB_OPTIONS"
RETVAL=$?
echo
;;
suse)
eval startproc $ctdbd "$CTDB_OPTIONS"
RETVAL=$?
;;
redhat)
eval $ctdbd "$CTDB_OPTIONS"
RETVAL=$?
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/ctdb || RETVAL=1
;;
debian)
eval start-stop-daemon --start --quiet --background \
--exec $ctdbd -- "$CTDB_OPTIONS"
RETVAL=$?
;;
esac
if [ $RETVAL -eq 0 ] ; then
if ! wait_until_ready ; then
RETVAL=1
pkill -9 -f $ctdbd >/dev/null 2>&1
fi
fi
case $init_style in
suse)
set_retval $RETVAL
rc_status -v
;;
redhat)
[ $RETVAL -eq 0 ] && success || failure
echo
;;
esac
return $RETVAL
}
stop() {
echo -n $"Shutting down ctdbd service: "
pkill -0 -f $ctdbd || {
echo -n " Warning: ctdbd not running ! "
case $init_style in
suse)
rc_status -v
;;
redhat)
echo ""
;;
esac
return 0
}
ctdb shutdown >/dev/null 2>&1
RETVAL=$?
count=0
while pkill -0 -f $ctdbd ; do
sleep 1
count=$(($count + 1))
[ $count -gt 30 ] && {
echo -n $"killing ctdbd "
pkill -9 -f $ctdbd
pkill -9 -f $CTDB_BASE/events.d/
}
done
# make sure all ips are dropped, pfkill -9 might leave them hanging around
drop_all_public_ips
rm -f "$pidfile"
case $init_style in
suse)
# re-set the return code to the recorded RETVAL in order
# to print the correct status message
set_retval $RETVAL
rc_status -v
;;
redhat)
[ $RETVAL -eq 0 ] && success || failure
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/ctdb
echo ""
;;
esac
return $RETVAL
}
restart() {
stop
start
}
# Given that CTDB_VALGRIND is a debug option we don't support the pid
# file. We just do a quick and dirty hack instead. Otherwise we just
# end up re-implementing each distro's pidfile support...
check_status_valgrind ()
{
if pkill -0 -f "valgrind.*${ctdbd}" ; then
echo "ctdbd is running under valgrind..."
return 0
else
echo "ctdbd is not running"
return 1
fi
}
check_status ()
{
# Backward compatibility. When we arrange to pass --pidfile to
# ctdbd we also create the directory that will contain it. If
# that directory is missing then we don't use the pidfile to check
# status.
if [ -d $(dirname "$pidfile") ] ; then
_pf_opt="-p $pidfile"
else
_pf_opt=""
fi
case "$init_style" in
valgrind)
check_status_valgrind
;;
suse)
checkproc $_pf_opt "$ctdbd"
rc_status -v
;;
redhat)
status $_pf_opt -l "ctdb" "$ctdbd"
;;
debian)
status_of_proc $_pf_opt "$ctdbd" "ctdb"
;;
esac
}
[ -x "$CTDB_BASE/rc.ctdb" ] && "$CTDB_BASE/rc.ctdb" $1
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload|force-reload)
restart
;;
status)
check_status
;;
condrestart|try-restart)
if check_status >/dev/null ; then
restart
fi
;;
cron)
# used from cron to auto-restart ctdb
check_status >/dev/null || restart
;;
*)
echo $"Usage: $0 {start|stop|restart|reload|force-reload|status|cron|condrestart|try-restart}"
exit 1
esac
exit $?