#!/bin/bash
#################################################################################
#                                                                               #
# iscsi-ha - High Availability framework for iSCSI cluster used in conjunction  #
# with XAPI based Xen Virtualization Environment (Xen Cloud Platform/XenServer) #
# Copyright 2021 Salvatore Costantino                                           #
# ha@pulsesupply.com                                                            #
#                                                                               #
#                                                                               #
#    iscsi-ha is free software: you can redistribute it and/or modify           #
#    it under the terms of the GNU General Public License as published by       #
#    the Free Software Foundation, either version 3 of the License, or          #
#    (at your option) any later version.                                        #
#                                                                               #
#    iscsi-ha is distributed in the hope that it will be useful,                #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of             #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              #
#    GNU General Public License for more details.                               #
#                                                                               #
#    You should have received a copy of the GNU General Public License          #
#    along with iscsi-ha.  If not, see <http://www.gnu.org/licenses/>.          #
#                                                                               #
#################################################################################
source /etc/iscsi-ha/iscsi-ha.conf
source /etc/iscsi-ha/iscsi-ha.load
source /etc/iscsi-ha/iscsi-ha.func
ISCSI_TARGET_SERVICE=$(basename $ISCSI_TARGET_SERVICE)

if [ -e $IHA_STATE_PATH/manual ]
then
	if [ "$(cat $IHA_STATE_PATH/manual)" = "become_secondary" ]
	then
		EXPECTED_TARGET_STATE='[expected stopped]'
		EXPECTED_DRBD_STATE='[expected secondary]'
		EXPECTED_REPLCIATION_IP="[${DRBD_VIRTUAL_IP} not expected here]"
	elif [ "$(cat $IHA_STATE_PATH/manual)" = "become_primary" ]
	then
		EXPECTED_TARGET_STATE='[expected running]'
		EXPECTED_DRBD_STATE='[expected primary]'
		EXPECTED_REPLCIATION_IP="[${DRBD_VIRTUAL_IP} expected here]"
	else
		EXPECTED_TARGET_STATE='[Error]'
	fi
	service_execute $ISCSI_TARGET_SERVICE status > /dev/null
	RETVAL=$?
	if [ $RETVAL -eq 0 ]
	then
		ISCSI_TARGET_STATUS=Running
	else
		ISCSI_TARGET_STATUS=Stopped
	fi
	make_box "iscsi-ha is in manual mode - current status shown below"
	echo "Storage role:   `drbdadm role all | awk -F '/' {'print $1'}` ${EXPECTED_DRBD_STATE}"
	echo "Replication IP: "`ip -4 addr show $DRBD_INTERFACE | grep inet | awk {'print $2'}`" ${EXPECTED_REPLCIATION_IP}"
	echo "iSCSI target:	${ISCSI_TARGET_STATUS} ${EXPECTED_TARGET_STATE}"
	exit 0
fi

if [ -e $STATUS ]
then
	while :
	do
		NOW=`date '+%s'`
		LAST_LOAD=`stat -c '%Y' $STATUS`
		DELTA=$(( $NOW - $LAST_LOAD ))
		TOLERANCE=$(( $MONITOR_DELAY + 5 ))
		if [ $DELTA -gt $TOLERANCE ]
		then
			clear
			date
			echo -e "##########################################################"
			echo -e "## iSCSI-ha Status cache is more than $DELTA seconds old"
			echo -e "## Tolerance = $TOLERANCE seconds. Check status"
			echo -e "##########################################################\r\n"	
			echo -e "Possible causes: 1) iSCSI-HA is actively failing over to standby host"
			echo -e "                    this can take up to 60 seconds or more depending on settings\r\n"
			echo -e "                 2) Service is not running. try 'service iscsi-ha status' to check running status"
			echo -e "                    If the service is not running, try 'service iscsi-ha start -w' to start the service"
			echo -e "\r\nControl + C to exit"
			sleep 1
		else
			clear
			make_box "iSCSI-HA Version $VERSION
`date`"
 
			CONTENTS=`expand /etc/iscsi-ha/state/status`
			make_box "$CONTENTS"
			echo "Control + C to exit"
			echo -e "\r\n"
			make_box "DRBD Status"
			make_box "`cat /proc/drbd`"
			sleep 2
		fi
	done
fi