Add a command-line option -A for enabling start delay (SBD_DELAY_START)

man/sbd.8.pod

@@ -289,6 +289,13 @@ present yet. This allows to set a timeout for waiting for devices to
 appear on start-up. If set to 0, start-up will be aborted immediately if
 no devices are available.
 
+=item B<-A>
+
+If enabled, sbd will delay on boot for "msgwait" seconds.
+This may be necessary if your cluster nodes reboot so fast that the
+other nodes are still waiting in the fence acknowledgement phase.
+This is an occasional issue with virtual machines.
+
 =item B<-Z>
 
 Enable trace mode. B<Warning: this is unsafe for production, use at your

src/sbd-common.c

@@ -89,6 +89,7 @@ usage(void)
 "			(default is 5, set to 0 to disable)\n"
 "-F <N>		# of failures before a servant is considered faulty (optional)\n"
 "			(default is 1, set to 0 to disable)\n"
+"-A		Enable start delay (wait for msgwait seconds at start) (optional)\n"
 "-P		Check Pacemaker quorum and node health (optional, watch only)\n"
 "-Z		Enable trace mode. WARNING: UNSAFE FOR PRODUCTION!\n"
 "Commands:\n"

src/sbd-inquisitor.c

@@ -877,10 +877,13 @@ int main(int argc, char **argv, char **envp)
         }
         cl_log(LOG_DEBUG, "Start delay: %d (%s)", (int)start_delay, value?value:"default");
 
-	while ((c = getopt(argc, argv, "czC:DPRTWZhvw:d:n:p:1:2:3:4:5:t:I:F:S:s:")) != -1) {
+	while ((c = getopt(argc, argv, "czC:DPRTAWZhvw:d:n:p:1:2:3:4:5:t:I:F:S:s:")) != -1) {
 		switch (c) {
 		case 'D':
 			break;
+		case 'A':
+			start_delay = 1;
+			break;
 		case 'Z':
 			debug_mode++;
 			cl_log(LOG_INFO, "Debug mode now at level %d", (int)debug_mode);

src/sbd.sh

@@ -59,16 +59,16 @@ always) SBD_OPTS+=" -S 0" ;;
 clean) SBD_OPTS+=" -S 1" ;;
 esac
 : ${SBD_DELAY_START:="no"}
+if ocf_is_true "$SBD_DELAY_START" ; then
+	SBD_OPTS+=" -A"
+fi
 
 start() {
 	if ! pidofproc -p $SBD_PIDFILE $SBD_BIN >/dev/null 2>&1 ; then
 		if ! $SBD_BIN -d $SBD_DEVICE $SBD_OPTS watch ; then
 			echo "SBD failed to start; aborting."
 			exit 1
 		fi
-		if ocf_is_true ${SBD_DELAY_START} ; then
-			sleep $(sbd -d "$SBD_DEVICE" dump | grep -m 1 msgwait | awk '{print $4}') 2>/dev/null
-		fi
 	else
 		return 0
 	fi