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	#!/bin/sh
	#
	# Copyright (c) 2014 David Vossel <davidvossel@gmail.com>
	# All Rights Reserved.
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of version 2 of the GNU General Public License as
	# published by the Free Software Foundation.
	#
	# This program is distributed in the hope that it would be useful, but
	# WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	#
	# Further, this software is distributed without any warranty that it is
	# free of the rightful claim of any third person regarding infringement
	# or the like. Any license provided herein, whether implied or
	# otherwise, applies only to this software file. Patent licenses, if
	# any, provided herein do not apply to combinations of this program with
	# other software, or any other product whatsoever.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program; if not, write the Free Software Foundation,
	# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	#

	##
	# README.
	#
	# This agent only supports being configured as a multistate Master
	# resource.
	#
	# Slave vs Master role:
	#
	# During the 'Slave' role, galera instances are in read-only mode and
	# will not attempt to connect to the cluster. This role exists as
	# a means to determine which galera instance is the most up-to-date. The
	# most up-to-date node will be used to bootstrap a galera cluster that
	# has no current members.
	#
	# The galera instances will only begin to be promoted to the Master role
	# once all the nodes in the 'wsrep_cluster_address' connection address
	# have entered read-only mode. At that point the node containing the
	# database that is most current will be promoted to Master.
	#
	# Once the first Master instance bootstraps the galera cluster, the
	# other nodes will join the cluster and start synchronizing via SST.
	# They will stay in Slave role as long as the SST is running. Their
	# promotion to Master will happen once synchronization is finished.
	#
	# Example: Create a galera cluster using nodes rhel7-node1 rhel7-node2 rhel7-node3
	#
	# pcs resource create db galera enable_creation=true \
	# wsrep_cluster_address="gcomm://rhel7-auto1,rhel7-auto2,rhel7-auto3" meta master-max=3 --master
	#
	# By setting the 'enable_creation' option, the database will be automatically
	# generated at startup. The meta attribute 'master-max=3' means that all 3
	# nodes listed in the wsrep_cluster_address list will be allowed to connect
	# to the galera cluster and perform replication.
	#
	# NOTE: If you have more nodes in the pacemaker cluster then you wish
	# to have in the galera cluster, make sure to use location contraints to prevent
	# pacemaker from attempting to place a galera instance on a node that is
	# not in the 'wsrep_cluster_address" list.
	#
	##

	#######################################################################
	# Initialization:

	: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
	. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
	. ${OCF_FUNCTIONS_DIR}/mysql-common.sh

	# It is common for some galera instances to store
	# check user that can be used to query status
	# in this file
	if [ -f "/etc/sysconfig/clustercheck" ]; then
	. /etc/sysconfig/clustercheck
	fi

	#######################################################################

	usage() {
	cat <<UEND
	usage: $0 (start\|stop\|validate-all\|meta-data\|monitor\|promote\|demote)

	$0 manages a galera Database as an HA resource.

	The 'start' operation starts the database.
	The 'stop' operation stops the database.
	The 'status' operation reports whether the database is running
	The 'monitor' operation reports whether the database seems to be working
	The 'promote' operation makes this mysql server run as master
	The 'demote' operation makes this mysql server run as slave
	The 'validate-all' operation reports whether the parameters are valid

	UEND
	}

	meta_data() {
	cat <<END
	<?xml version="1.0"?>
	<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
	<resource-agent name="galera">
	<version>1.0</version>

	<longdesc lang="en">
	Resource script for managing galara database.
	</longdesc>
	<shortdesc lang="en">Manages a galara instance</shortdesc>
	<parameters>

	<parameter name="binary" unique="0" required="0">
	<longdesc lang="en">
	Location of the MySQL server binary
	</longdesc>
	<shortdesc lang="en">MySQL server binary</shortdesc>
	<content type="string" default="${OCF_RESKEY_binary_default}" />
	</parameter>

	<parameter name="client_binary" unique="0" required="0">
	<longdesc lang="en">
	Location of the MySQL client binary
	</longdesc>
	<shortdesc lang="en">MySQL client binary</shortdesc>
	<content type="string" default="${OCF_RESKEY_client_binary_default}" />
	</parameter>

	<parameter name="config" unique="0" required="0">
	<longdesc lang="en">
	Configuration file
	</longdesc>
	<shortdesc lang="en">MySQL config</shortdesc>
	<content type="string" default="${OCF_RESKEY_config_default}" />
	</parameter>

	<parameter name="datadir" unique="0" required="0">
	<longdesc lang="en">
	Directory containing databases
	</longdesc>
	<shortdesc lang="en">MySQL datadir</shortdesc>
	<content type="string" default="${OCF_RESKEY_datadir_default}" />
	</parameter>

	<parameter name="user" unique="0" required="0">
	<longdesc lang="en">
	User running MySQL daemon
	</longdesc>
	<shortdesc lang="en">MySQL user</shortdesc>
	<content type="string" default="${OCF_RESKEY_user_default}" />
	</parameter>

	<parameter name="group" unique="0" required="0">
	<longdesc lang="en">
	Group running MySQL daemon (for logfile and directory permissions)
	</longdesc>
	<shortdesc lang="en">MySQL group</shortdesc>
	<content type="string" default="${OCF_RESKEY_group_default}"/>
	</parameter>

	<parameter name="log" unique="0" required="0">
	<longdesc lang="en">
	The logfile to be used for mysqld.
	</longdesc>
	<shortdesc lang="en">MySQL log file</shortdesc>
	<content type="string" default="${OCF_RESKEY_log_default}"/>
	</parameter>

	<parameter name="pid" unique="0" required="0">
	<longdesc lang="en">
	The pidfile to be used for mysqld.
	</longdesc>
	<shortdesc lang="en">MySQL pid file</shortdesc>
	<content type="string" default="${OCF_RESKEY_pid_default}"/>
	</parameter>

	<parameter name="socket" unique="0" required="0">
	<longdesc lang="en">
	The socket to be used for mysqld.
	</longdesc>
	<shortdesc lang="en">MySQL socket</shortdesc>
	<content type="string" default="${OCF_RESKEY_socket_default}"/>
	</parameter>

	<parameter name="enable_creation" unique="0" required="0">
	<longdesc lang="en">
	If the MySQL database does not exist, it will be created
	</longdesc>
	<shortdesc lang="en">Create the database if it does not exist</shortdesc>
	<content type="boolean" default="${OCF_RESKEY_enable_creation_default}"/>
	</parameter>

	<parameter name="additional_parameters" unique="0" required="0">
	<longdesc lang="en">
	Additional parameters which are passed to the mysqld on startup.
	(e.g. --skip-external-locking or --skip-grant-tables)
	</longdesc>
	<shortdesc lang="en">Additional parameters to pass to mysqld</shortdesc>
	<content type="string" default="${OCF_RESKEY_additional_parameters_default}"/>
	</parameter>


	<parameter name="wsrep_cluster_address" unique="0" required="1">
	<longdesc lang="en">
	The galera cluster address. This takes the form of:
	gcomm://node,node,node

	Only nodes present in this node list will be allowed to start a galera instance.
	It is expected that the galera node names listed in this address match valid
	pacemaker node names.
	</longdesc>
	<shortdesc lang="en">Galera cluster address</shortdesc>
	<content type="string" default=""/>
	</parameter>

	<parameter name="check_user" unique="0" required="0">
	<longdesc lang="en">
	Cluster check user.
	</longdesc>
	<shortdesc lang="en">MySQL test user</shortdesc>
	<content type="string" default="root" />
	</parameter>

	<parameter name="check_passwd" unique="0" required="0">
	<longdesc lang="en">
	Cluster check user password
	</longdesc>
	<shortdesc lang="en">check password</shortdesc>
	<content type="string" default="" />
	</parameter>

	</parameters>

	<actions>
	<action name="start" timeout="120" />
	<action name="stop" timeout="120" />
	<action name="status" timeout="60" />
	<action name="monitor" depth="0" timeout="30" interval="20" />
	<action name="monitor" role="Master" depth="0" timeout="30" interval="10" />
	<action name="monitor" role="Slave" depth="0" timeout="30" interval="30" />
	<action name="promote" timeout="300" />
	<action name="demote" timeout="120" />
	<action name="validate-all" timeout="5" />
	<action name="meta-data" timeout="5" />
	</actions>
	</resource-agent>
	END
	}

	get_option_variable()
	{
	local key=$1

	$MYSQL $MYSQL_OPTIONS_CHECK -e "SHOW VARIABLES like '$key';" \| tail -1
	}

	get_status_variable()
	{
	local key=$1

	$MYSQL $MYSQL_OPTIONS_CHECK -e "show status like '$key';" \| tail -1
	}

	set_bootstrap_node()
	{
	local node=$1

	${HA_SBIN_DIR}/crm_attribute -N $node -l reboot --name "${INSTANCE_ATTR_NAME}-bootstrap" -v "true"
	}

	clear_bootstrap_node()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-bootstrap" -D
	}

	is_bootstrap()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-bootstrap" -Q 2>/dev/null

	}

	set_no_grastate()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-no-grastate" -v "true"
	}

	clear_no_grastate()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-no-grastate" -D
	}

	is_no_grastate()
	{
	local node=$1
	${HA_SBIN_DIR}/crm_attribute -N $node -l reboot --name "${INSTANCE_ATTR_NAME}-no-grastate" -Q 2>/dev/null
	}

	clear_last_commit()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-last-committed" -D
	}

	set_last_commit()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-last-committed" -v $1
	}

	get_last_commit()
	{
	local node=$1

	if [ -z "$node" ]; then
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-last-committed" -Q 2>/dev/null
	else
	${HA_SBIN_DIR}/crm_attribute -N $node -l reboot --name "${INSTANCE_ATTR_NAME}-last-committed" -Q 2>/dev/null
	fi
	}

	wait_for_sync()
	{
	local state=$(get_status_variable "wsrep_local_state")

	ocf_log info "Waiting for database to sync with the cluster. "
	while [ "$state" != "4" ]; do
	sleep 1
	state=$(get_status_variable "wsrep_local_state")
	done
	ocf_log info "Database synced."
	}

	set_sync_needed()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-sync-needed" -v "true"
	}

	clear_sync_needed()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-sync-needed" -D
	}

	check_sync_needed()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-sync-needed" -Q 2>/dev/null
	}


	# this function is called when attribute sync-needed is set in the CIB
	check_sync_status()
	{
	# if the pidfile is created, mysqld is up and running
	# an IST might still be in progress, check wsrep status
	if [ -e $OCF_RESKEY_pid ]; then
	local cluster_status=$(get_status_variable "wsrep_cluster_status")
	local state=$(get_status_variable "wsrep_local_state")
	local ready=$(get_status_variable "wsrep_ready")

	if [ -z "$cluster_status" -o -z "$state" -o -z "$ready" ]; then
	ocf_exit_reason "Unable to retrieve state transfer status, verify check_user '$OCF_RESKEY_check_user' has permissions to view status"
	return $OCF_ERR_GENERIC
	fi

	if [ "$cluster_status" != "Primary" ]; then
	ocf_exit_reason "local node <${NODENAME}> is started, but not in primary mode. Unknown state."
	return $OCF_ERR_GENERIC
	fi

	if [ "$state" = "4" -a "$ready" = "ON" ]; then
	ocf_log info "local node synced with the cluster"
	# when sync is finished, we are ready to switch to Master
	clear_sync_needed
	set_master_score
	return $OCF_SUCCESS
	fi
	fi

	# if we pass here, an IST or SST is still in progress
	ocf_log info "local node syncing"
	return $OCF_SUCCESS
	}

	is_primary()
	{
	cluster_status=$(get_status_variable "wsrep_cluster_status")
	if [ "$cluster_status" = "Primary" ]; then
	return 0
	fi

	if [ -z "$cluster_status" ]; then
	ocf_exit_reason "Unable to retrieve wsrep_cluster_status, verify check_user '$OCF_RESKEY_check_user' has permissions to view status"
	else
	ocf_log info "Galera instance wsrep_cluster_status=${cluster_status}"
	fi
	return 1
	}

	is_readonly()
	{
	local res=$(get_option_variable "read_only")

	if ! ocf_is_true "$res"; then
	return 1
	fi

	cluster_status=$(get_status_variable "wsrep_cluster_status")
	if ! [ "$cluster_status" = "Disconnected" ]; then
	return 1
	fi

	return 0
	}

	master_exists()
	{
	if [ "$__OCF_ACTION" = "demote" ]; then
	# We don't want to detect master instances during demote.
	# 1. we could be detecting ourselves as being master, which is no longer the case.
	# 2. we could be detecting other master instances that are in the process of shutting down.
	# by not detecting other master instances in "demote" we are deferring this check
	# to the next recurring monitor operation which will be much more accurate
	return 1
	fi
	# determine if a master instance is already up and is healthy
	crm_mon --as-xml \| grep "resource.id=\"${OCF_RESOURCE_INSTANCE}\".role=\"Master\".active=\"true\".orphaned=\"false\".*failed=\"false\"" > /dev/null 2>&1
	return $?
	}

	clear_master_score()
	{
	local node=$1
	if [ -z "$node" ]; then
	$CRM_MASTER -D
	else
	$CRM_MASTER -D -N $node
	fi
	}

	set_master_score()
	{
	local node=$1

	if [ -z "$node" ]; then
	$CRM_MASTER -v 100
	else
	$CRM_MASTER -N $node -v 100
	fi
	}

	greater_than_equal_long()
	{
	# there are values we need to compare in this script
	# that are too large for shell -gt to process
	echo \| awk -v n1="$1" -v n2="$2" '{if (n1>=n2) printf ("true"); else printf ("false");}' \| grep -q "true"
	}

	detect_first_master()
	{
	local best_commit=0
	local best_node="$NODENAME"
	local last_commit=0
	local missing_nodes=0
	local nodes=""
	local nodes_recovered=""

	# avoid selecting a recovered node as bootstrap if possible
	for node in $(echo "$OCF_RESKEY_wsrep_cluster_address" \| sed 's/gcomm:\/\///g' \| tr -d ' ' \| tr -s ',' ' '); do
	if is_no_grastate $node; then
	nodes_recovered="$nodes_recovered $node"
	else
	nodes="$nodes $node"
	fi
	done

	for node in $nodes_recovered $nodes; do
	last_commit=$(get_last_commit $node)

	if [ -z "$last_commit" ]; then
	ocf_log info "Waiting on node <${node}> to report database status before Master instances can start."
	missing_nodes=1
	continue
	fi

	# this means -1, or that no commit has occured yet.
	if [ "$last_commit" = "18446744073709551615" ]; then
	last_commit="0"
	fi

	greater_than_equal_long "$last_commit" "$best_commit"
	if [ $? -eq 0 ]; then
	best_node=$node
	best_commit=$last_commit
	fi

	done

	if [ $missing_nodes -eq 1 ]; then
	return
	fi

	ocf_log info "Promoting $best_node to be our bootstrap node"
	set_master_score $best_node
	set_bootstrap_node $best_node
	}

	detect_galera_pid()
	{
	ps auxww \| grep -v -e "${OCF_RESKEY_binary}" -e grep \| grep -qe "--pid-file=$OCF_RESKEY_pid"
	}

	galera_status()
	{
	local loglevel=$1
	local rc
	local running

	if [ -e $OCF_RESKEY_pid ]; then
	mysql_common_status $loglevel
	rc=$?
	else
	# if pidfile is not created, the server may
	# still be starting up, e.g. running SST
	detect_galera_pid
	running=$?
	if [ $running -eq 0 ]; then
	rc=$OCF_SUCCESS
	else
	ocf_log $loglevel "MySQL is not running"
	rc=$OCF_NOT_RUNNING
	fi
	fi

	return $rc
	}

	galera_start_nowait()
	{
	local mysql_extra_params="$1"
	local pid
	local running

	${OCF_RESKEY_binary} --defaults-file=$OCF_RESKEY_config \
	--pid-file=$OCF_RESKEY_pid \
	--socket=$OCF_RESKEY_socket \
	--datadir=$OCF_RESKEY_datadir \
	--log-error=$OCF_RESKEY_log \
	--user=$OCF_RESKEY_user $OCF_RESKEY_additional_parameters \
	$mysql_extra_params >/dev/null 2>&1 &
	pid=$!

	# Spin waiting for the server to be spawned.
	# Let the CRM/LRM time us out if required.
	start_wait=1
	while [ $start_wait = 1 ]; do
	if ! ps $pid > /dev/null 2>&1; then
	wait $pid
	ocf_exit_reason "MySQL server failed to start (pid=$pid) (rc=$?), please check your installation"
	return $OCF_ERR_GENERIC
	fi
	detect_galera_pid
	running=$?
	if [ $running -eq 0 ]; then
	start_wait=0
	else
	ocf_log info "MySQL is not running"
	fi
	sleep 2
	done

	return $OCF_SUCCESS
	}

	galera_start_local_node()
	{
	local rc
	local extra_opts
	local bootstrap

	bootstrap=$(is_bootstrap)

	master_exists
	if [ $? -eq 0 ]; then
	# join without bootstrapping
	ocf_log info "Node <${NODENAME}> is joining the cluster"
	extra_opts="--wsrep-cluster-address=${OCF_RESKEY_wsrep_cluster_address}"
	elif ocf_is_true $bootstrap; then
	ocf_log info "Node <${NODENAME}> is bootstrapping the cluster"
	extra_opts="--wsrep-cluster-address=gcomm://"
	else
	ocf_exit_reason "Failure, Attempted to join cluster of $OCF_RESOURCE_INSTANCE before master node has been detected."
	clear_last_commit
	return $OCF_ERR_GENERIC
	fi

	# clear last_commit before we start galera to make sure there
	# won't be discrepency between the cib and galera if this node
	# processes a few transactions and fails before we detect it
	clear_last_commit

	mysql_common_prepare_dirs

	# At start time, if galera requires a SST rather than an IST, the
	# mysql server's pidfile won't be available until SST finishes,
	# which can be longer than the start timeout. So we only check
	# bootstrap node extensively. Joiner nodes are monitored in the
	# "monitor" op
	if ocf_is_true $bootstrap; then
	# start server and wait until it's up and running
	mysql_common_start "$extra_opts"
	rc=$?
	if [ $rc != $OCF_SUCCESS ]; then
	return $rc
	fi

	mysql_common_status info
	rc=$?

	if [ $rc != $OCF_SUCCESS ]; then
	ocf_exit_reason "Failed initial monitor action"
	return $rc
	fi

	is_readonly
	if [ $? -eq 0 ]; then
	ocf_exit_reason "Failure. Master instance started in read-only mode, check configuration."
	return $OCF_ERR_GENERIC
	fi

	is_primary
	if [ $? -ne 0 ]; then
	ocf_exit_reason "Failure. Master instance started, but is not in Primary mode."
	return $OCF_ERR_GENERIC
	fi

	clear_bootstrap_node
	# clear attribute no-grastate. if last shutdown was
	# not clean, we cannot be extra-cautious by requesting a SST
	# since this is the bootstrap node
	clear_no_grastate
	else
	# only start server, defer full checks to "monitor" op
	galera_start_nowait "$extra_opts"
	rc=$?
	if [ $rc != $OCF_SUCCESS ]; then
	return $rc
	fi

	set_sync_needed
	# attribute no-grastate will be cleared once the joiner
	# has finished syncing and is promoted to Master
	fi

	ocf_log info "Galera started"
	return $OCF_SUCCESS
	}

	detect_last_commit()
	{
	local last_commit
	local recover_args="--defaults-file=$OCF_RESKEY_config \
	--pid-file=$OCF_RESKEY_pid \
	--socket=$OCF_RESKEY_socket \
	--datadir=$OCF_RESKEY_datadir \
	--user=$OCF_RESKEY_user"
	local recovered_position_regex='s/.WSREP\:\s[R\|r]ecovered\sposition.\:$.$\s$/\1/p'

	ocf_log info "attempting to detect last commit version by reading ${OCF_RESKEY_datadir}/grastate.dat"
	last_commit="$(cat ${OCF_RESKEY_datadir}/grastate.dat \| sed -n 's/^seqno.\s$.$\s*$/\1/p')"
	if [ -z "$last_commit" ] \|\| [ "$last_commit" = "-1" ]; then
	local tmp=$(mktemp)
	local tmperr=$(mktemp)

	# if we pass here because grastate.dat doesn't exist,
	# try not to bootstrap from this node if possible
	if [ ! -f ${OCF_RESKEY_datadir}/grastate.dat ]; then
	set_no_grastate
	fi

	ocf_log info "now attempting to detect last commit version using 'mysqld_safe --wsrep-recover'"

	${OCF_RESKEY_binary} $recover_args --wsrep-recover > $tmp 2> $tmperr

	last_commit="$(cat $tmp \| sed -n $recovered_position_regex)"
	if [ -z "$last_commit" ]; then
	# Galera uses InnoDB's 2pc transactions internally. If
	# server was stopped in the middle of a replication, the
	# recovery may find a "prepared" XA transaction in the
	# redo log, and mysql won't recover automatically

	cat $tmperr \| grep -q -E '\[ERROR\]\s+Found\s+[0-9]+\s+prepared\s+transactions!' 2>/dev/null
	if [ $? -eq 0 ]; then
	# we can only rollback the transaction, but that's OK
	# since the DB will get resynchronized anyway
	ocf_log warn "local node <${NODENAME}> was not shutdown properly. Rollback stuck transaction with --tc-heuristic-recover"
	${OCF_RESKEY_binary} $recover_args --wsrep-recover \
	--tc-heuristic-recover=rollback > $tmp 2>/dev/null

	last_commit="$(cat $tmp \| sed -n $recovered_position_regex)"
	if [ ! -z "$last_commit" ]; then
	ocf_log warn "State recovered. force SST at next restart for full resynchronization"
	rm -f ${OCF_RESKEY_datadir}/grastate.dat
	# try not to bootstrap from this node if possible
	set_no_grastate
	fi
	fi
	fi
	rm -f $tmp $tmperr
	fi

	if [ ! -z "$last_commit" ]; then
	ocf_log info "Last commit version found: $last_commit"
	set_last_commit $last_commit
	return $OCF_SUCCESS
	else
	ocf_exit_reason "Unable to detect last known write sequence number"
	clear_last_commit
	return $OCF_ERR_GENERIC
	fi
	}

	galera_promote()
	{
	local rc
	local extra_opts
	local bootstrap

	master_exists
	if [ $? -ne 0 ]; then
	# promoting the first master will bootstrap the cluster
	if is_bootstrap; then
	galera_start_local_node
	rc=$?
	return $rc
	else
	ocf_exit_reason "Attempted to start the cluster without being a bootstrap node."
	return $OCF_ERR_GENERIC
	fi
	else
	# promoting other masters only performs sanity checks
	# as the joining nodes were started during the "monitor" op
	if ! check_sync_needed; then
	# sync is done, clear info about last startup
	clear_no_grastate
	return $OCF_SUCCESS
	else
	ocf_exit_reason "Attempted to promote local node while sync was still needed."
	return $OCF_ERR_GENERIC
	fi
	fi
	}

	galera_demote()
	{
	mysql_common_stop
	rc=$?
	if [ $rc -ne $OCF_SUCCESS ] && [ $rc -ne $OCF_NOT_RUNNING ]; then
	ocf_exit_reason "Failed to stop Master galera instance during demotion to Master"
	return $rc
	fi

	# if this node was previously a bootstrap node, that is no longer the case.
	clear_bootstrap_node
	clear_last_commit
	clear_sync_needed
	clear_no_grastate

	# record last commit for next promotion
	detect_last_commit
	rc=$?
	return $rc
	}

	galera_start()
	{
	local rc

	echo $OCF_RESKEY_wsrep_cluster_address \| grep -q $NODENAME
	if [ $? -ne 0 ]; then
	ocf_exit_reason "local node <${NODENAME}> must be a member of the wsrep_cluster_address <${OCF_RESKEY_wsrep_cluster_address}>to start this galera instance"
	return $OCF_ERR_CONFIGURED
	fi

	galera_status info
	if [ $? -ne $OCF_NOT_RUNNING ]; then
	ocf_exit_reason "master galera instance started outside of the cluster's control"
	return $OCF_ERR_GENERIC
	fi

	mysql_common_prepare_dirs

	detect_last_commit
	rc=$?
	if [ $rc -ne $OCF_SUCCESS ]; then
	return $rc
	fi

	master_exists
	if [ $? -eq 0 ]; then
	ocf_log info "Master instances are already up, local node will join in when started"
	else
	clear_master_score
	detect_first_master
	fi

	return $OCF_SUCCESS
	}

	galera_monitor()
	{
	local rc
	local status_loglevel="err"

	# Set loglevel to info during probe
	if ocf_is_probe; then
	status_loglevel="info"
	fi

	# Check whether mysql is running or about to start after sync
	galera_status $status_loglevel
	rc=$?

	if [ $rc -eq $OCF_NOT_RUNNING ]; then
	last_commit=$(get_last_commit $NODENAME)
	if [ -n "$last_commit" ];then
	rc=$OCF_SUCCESS

	if ocf_is_probe; then
	# prevent state change during probe
	return $rc
	fi

	master_exists
	if [ $? -ne 0 ]; then
	detect_first_master
	else
	# a master instance exists and is healthy.
	# start this node and mark it as "pending sync"
	ocf_log info "cluster is running. start local node to join in"
	galera_start_local_node
	rc=$?
	fi
	fi
	return $rc
	elif [ $rc -ne $OCF_SUCCESS ]; then
	return $rc
	fi

	# if we make it here, mysql is running or about to start after sync.
	# Check cluster status now.

	echo $OCF_RESKEY_wsrep_cluster_address \| grep -q $NODENAME
	if [ $? -ne 0 ]; then
	ocf_exit_reason "local node <${NODENAME}> is started, but is not a member of the wsrep_cluster_address <${OCF_RESKEY_wsrep_cluster_address}>"
	return $OCF_ERR_GENERIC
	fi

	check_sync_needed
	if [ $? -eq 0 ]; then
	# galera running and sync is needed: slave state
	if ocf_is_probe; then
	# prevent state change during probe
	rc=$OCF_SUCCESS
	else
	check_sync_status
	rc=$?
	fi
	else
	is_primary
	if [ $? -ne 0 ]; then
	ocf_exit_reason "local node <${NODENAME}> is started, but not in primary mode. Unknown state."
	rc=$OCF_ERR_GENERIC
	else
	# galera running, no need to sync: master state and everything's clear
	rc=$OCF_RUNNING_MASTER

	if ocf_is_probe; then
	# restore master score during probe
	# if we detect this is a master instance
	set_master_score
	fi
	fi
	fi

	return $rc
	}

	galera_stop()
	{
	local rc
	# make sure the process is stopped
	mysql_common_stop
	rc=$?

	clear_last_commit
	clear_master_score
	clear_bootstrap_node
	clear_sync_needed
	clear_no_grastate
	return $rc
	}

	galera_validate()
	{
	if ! ocf_is_ms; then
	ocf_exit_reason "Galera must be configured as a multistate Master/Slave resource."
	return $OCF_ERR_CONFIGURED
	fi

	if [ -z "$OCF_RESKEY_wsrep_cluster_address" ]; then
	ocf_exit_reason "Galera must be configured with a wsrep_cluster_address value."
	return $OCF_ERR_CONFIGURED
	fi

	mysql_common_validate
	}

	case "$1" in
	meta-data) meta_data
	exit $OCF_SUCCESS;;
	usage\|help) usage
	exit $OCF_SUCCESS;;
	esac

	galera_validate
	rc=$?
	LSB_STATUS_STOPPED=3
	if [ $rc -ne 0 ]; then
	case "$1" in
	stop) exit $OCF_SUCCESS;;
	monitor) exit $OCF_NOT_RUNNING;;
	status) exit $LSB_STATUS_STOPPED;;
	*) exit $rc;;
	esac
	fi

	if [ -z "${OCF_RESKEY_check_passwd}" ]; then
	# This value is automatically sourced from /etc/sysconfig/checkcluster if available
	OCF_RESKEY_check_passwd=${MYSQL_PASSWORD}
	fi
	if [ -z "${OCF_RESKEY_check_user}" ]; then
	# This value is automatically sourced from /etc/sysconfig/checkcluster if available
	OCF_RESKEY_check_user=${MYSQL_USERNAME}
	fi
	: ${OCF_RESKEY_check_user="root"}

	MYSQL_OPTIONS_CHECK="-nNE --user=${OCF_RESKEY_check_user}"
	if [ -n "${OCF_RESKEY_check_passwd}" ]; then
	MYSQL_OPTIONS_CHECK="$MYSQL_OPTIONS_CHECK --password=${OCF_RESKEY_check_passwd}"
	fi

	# This value is automatically sourced from /etc/sysconfig/checkcluster if available
	if [ -n "${MYSQL_HOST}" ]; then
	MYSQL_OPTIONS_CHECK="$MYSQL_OPTIONS_CHECK -h ${MYSQL_HOST}"
	fi

	# This value is automatically sourced from /etc/sysconfig/checkcluster if available
	if [ -n "${MYSQL_PORT}" ]; then
	MYSQL_OPTIONS_CHECK="$MYSQL_OPTIONS_CHECK -P ${MYSQL_PORT}"
	fi



	# What kind of method was invoked?
	case "$1" in
	start) galera_start;;
	stop) galera_stop;;
	status) galera_status err;;
	monitor) galera_monitor;;
	promote) galera_promote;;
	demote) galera_demote;;
	validate-all) exit $OCF_SUCCESS;;

	*) usage
	exit $OCF_ERR_UNIMPLEMENTED;;
	esac

	# vi:sw=4:ts=4:et:

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