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|
#!/bin/sh
# ctdbd wrapper - start or stop CTDB
usage ()
{
echo "usage: ctdbd_wrapper <pidfile> { start | stop }"
exit 1
}
[ $# -eq 2 ] || usage
pidfile="$1"
action="$2"
############################################################
if [ -z "$CTDB_BASE" ] ; then
export CTDB_BASE="/usr/local/etc/ctdb"
fi
. "${CTDB_BASE}/functions"
loadconfig "ctdb"
[ -n "$CTDB_SOCKET" ] && export CTDB_SOCKET
ctdbd="${CTDBD:-/usr/local/sbin/ctdbd}"
############################################################
# ctdbd_is_running()
# Check if ctdbd is running. ctdbd is only considered to running if
# the PID in the PID file is active and is called "ctdbd". Return
# true if this is the case. Print the PID regardless, since it can be
# used to kill stale processes in the session.
ctdbd_is_running ()
{
if read _pid 2>/dev/null <"$pidfile" ; then
echo "$_pid"
# This could be optimised with ps options -q and -h.
# However, -q is not generally available because it is
# fairly new and -h is not in some older distros. The
# options below are portable.
_cmd=$(ps -p "$_pid" -o comm | tail -n +2)
[ "$_cmd" = "ctdbd" ]
else
# Missing/empty PID file
return 1
fi
}
############################################################
# If necessary, mount volatile database directory on tmpfs
dbdir_tmpfs_start ()
{
if [ -z "$CTDB_DBDIR_TMPFS_OPTIONS" ] ; then
return
fi
# Shortcut for readability
_opts="$CTDB_DBDIR_TMPFS_OPTIONS"
mkdir -p "$CTDB_DBDIR" || exit $?
# If already mounted then remount, otherwise mount
if findmnt -t tmpfs "$CTDB_DBDIR" >/dev/null ; then
mount -t tmpfs -o "remount,$_opts" none "$CTDB_DBDIR" || \
exit $?
else
mount -t tmpfs -o "$_opts" none "$CTDB_DBDIR" || exit $?
fi
}
# If necessary, unmount volatile database tmpfs directory on exit
dbdir_tmpfs_stop ()
{
if [ -z "$CTDB_DBDIR_TMPFS_OPTIONS" ] ; then
return
fi
if [ -d "$CTDB_DBDIR" ] && findmnt -t tmpfs "$CTDB_DBDIR" >/dev/null ; then
umount "$CTDB_DBDIR"
fi
}
# Only the nested function references its arguments
# shellcheck disable=SC2120
build_ctdb_options ()
{
ctdb_options=""
maybe_set ()
{
# If the given variable isn't set then do nothing
[ -n "$2" ] || return
# If a required value for the variable and it doesn't match,
# then do nothing
[ -z "$3" -o "$3" = "$2" ] || return
val="'$2'"
case "$1" in
--*) sep="=" ;;
-*) sep=" " ;;
esac
# For these options we're only passing a value-less flag.
if [ -n "$3" ] ; then
val=""
sep=""
fi
ctdb_options="${ctdb_options}${ctdb_options:+ }${1}${sep}${val}"
}
if [ -z "$CTDB_RECOVERY_LOCK" ] ; then
echo "No recovery lock specified. Starting CTDB without split brain prevention."
fi
maybe_set "--reclock" "$CTDB_RECOVERY_LOCK"
maybe_set "--pidfile" "$pidfile"
# build up ctdb_options variable from optional parameters
maybe_set "--logging" "$CTDB_LOGGING"
maybe_set "--nlist" "$CTDB_NODES"
maybe_set "--socket" "$CTDB_SOCKET"
maybe_set "--listen" "$CTDB_NODE_ADDRESS"
maybe_set "--public-addresses" "$CTDB_PUBLIC_ADDRESSES"
maybe_set "--public-interface" "$CTDB_PUBLIC_INTERFACE"
maybe_set "--dbdir" "$CTDB_DBDIR"
maybe_set "--dbdir-persistent" "$CTDB_DBDIR_PERSISTENT"
maybe_set "--dbdir-state" "$CTDB_DBDIR_STATE"
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 "--nosetsched" "$CTDB_NOSETSCHED" "yes"
maybe_set "--script-log-level" "$CTDB_SCRIPT_LOG_LEVEL"
maybe_set "--max-persistent-check-errors" "$CTDB_MAX_PERSISTENT_CHECK_ERRORS"
}
export_debug_variables ()
{
[ -n "$CTDB_DEBUG_HUNG_SCRIPT" ] && export CTDB_DEBUG_HUNG_SCRIPT
[ -n "$CTDB_EXTERNAL_TRACE" ] && export CTDB_EXTERNAL_TRACE
[ -n "$CTDB_DEBUG_LOCKS" ] && export CTDB_DEBUG_LOCKS
}
kill_ctdbd ()
{
_session="$1"
if [ -n "$_session" ] ; then
pkill -9 -s "$_session" 2>/dev/null
fi
}
############################################################
start()
{
if _session=$(ctdbd_is_running) ; then
echo "CTDB is already running"
return 0
fi
# About to start new $ctdbd. The main daemon is not running but
# there may still be other processes around, so do some cleanup.
kill_ctdbd "$_session"
dbdir_tmpfs_start
# build_ctdb_options() takes no arguments
# shellcheck disable=SC2119
build_ctdb_options
export_debug_variables
# Explicitly trying to disable core files, no other way
# shellcheck disable=SC2039
if [ "$CTDB_SUPPRESS_COREFILE" = "yes" ]; then
ulimit -c 0
else
ulimit -c unlimited
fi
# Unsupported option easily avoided by not using configuration variable
# shellcheck disable=SC2039
if [ -n "$CTDB_MAX_OPEN_FILES" ]; then
ulimit -n "$CTDB_MAX_OPEN_FILES"
fi
_d=$(dirname "$pidfile")
mkdir -p "$_d"
if [ -n "$CTDB_VALGRIND" -a "$CTDB_VALGRIND" != "no" ] ; then
if [ "$CTDB_VALGRIND" = "yes" ] ; then
ctdbd="valgrind -q --log-file=/usr/local/var/log/ctdb_valgrind ${ctdbd}"
else
ctdbd="${CTDB_VALGRIND} ${ctdbd}"
fi
ctdb_options="${ctdb_options} --valgrinding"
fi
case "$CTDB_LOGGING" in
syslog:udp|syslog:udp-rfc5424)
logger -t ctdbd "CTDB is being run with ${CTDB_LOGGING}. If nothing is logged then check your syslogd configuration"
;;
syslog|syslog:*) : ;;
file:*)
logger -t ctdbd "CTDB is being run without syslog enabled. Logs will be in ${CTDB_LOGGING#file:}"
;;
*)
logger -t ctdbd "CTDB is being run without syslog enabled. Logs will be in log.ctdb"
esac
eval "$ctdbd" "$ctdb_options" || return 1
# Wait until ctdbd has started and is ready to respond to clients.
_pid=""
_timeout="${CTDB_STARTUP_TIMEOUT:-10}"
_count=0
while [ "$_count" -lt "$_timeout" ] ; do
if $CTDB runstate first_recovery startup running >/dev/null 2>&1 ; then
return 0
fi
_count=$((_count + 1))
sleep 1
done
echo "Timed out waiting for initialisation - check logs - killing CTDB"
kill_ctdbd "$_pid"
drop_all_public_ips >/dev/null 2>&1
return 1
}
stop()
{
if ! _session=$(ctdbd_is_running) ; then
echo "CTDB is not running"
return 0
fi
$CTDB shutdown
# Wait for remaining CTDB processes to exit...
_timeout=${CTDB_SHUTDOWN_TIMEOUT:-30}
_count=0
_terminated=false
while [ "$_count" -lt "$_timeout" ] ; do
if ! pkill -0 -s "$_session" 2>/dev/null ; then
_terminated=true
break
fi
_count=$((_count + 1))
sleep 1
done
if ! $_terminated ; then
echo "Timed out waiting for CTDB to shutdown. Killing CTDB processes."
kill_ctdbd "$_session"
drop_all_public_ips >/dev/null 2>&1
sleep 1
if pkill -0 -s "$_session" ; then
# If SIGKILL didn't work then things are bad...
echo "Failed to kill all CTDB processes. Giving up."
return 1
fi
fi
dbdir_tmpfs_stop
return 0
}
############################################################
# Allow notifications for start/stop.
if [ -x "$CTDB_BASE/rc.ctdb" ] ; then
"$CTDB_BASE/rc.ctdb" "$action"
fi
case "$action" in
start) start ;;
stop) stop ;;
*)
echo "usage: $0 {start|stop}"
exit 1
esac
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