No OneTemporary
Actions

Size

37 KB

Referenced Files

None

Subscribers

None

View Options

	diff --git a/heartbeat/galera.in b/heartbeat/galera.in
	index 6aed3e4b6..b518595cb 100755
	--- a/heartbeat/galera.in
	+++ b/heartbeat/galera.in
	@@ -1,1097 +1,1106 @@
	#!@BASH_SHELL@
	#
	# 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 Promoted
	# resource.
	#
	# Unpromoted vs Promoted role:
	#
	# During the 'Unpromoted' role, galera instances are in read-only mode and
	# will not attempt to connect to the cluster. This role exists only 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 Promoted 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 Promoted. Once the first
	# Promoted instance bootstraps the galera cluster, the other nodes will be
	# promoted to Promoted as well.
	#
	# 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 promoted-max=3 --promoted
	#
	# By setting the 'enable_creation' option, the database will be automatically
	# generated at startup. The meta attribute 'promoted-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

	if [ "$__OCF_ACTION" != "meta-data" ]; then
	. ${OCF_FUNCTIONS_DIR}/mysql-common.sh
	NODENAME=$(ocf_attribute_target)
	fi

	# 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
	elif [ -f "/etc/default/clustercheck" ]; then
	. /etc/default/clustercheck
	fi

	# Parameter defaults

	OCF_RESKEY_wsrep_cluster_address_default=""
	OCF_RESKEY_cluster_host_map_default=""
	OCF_RESKEY_check_user_default=""
	OCF_RESKEY_check_passwd_default=""
	OCF_RESKEY_two_node_mode_default="false"

	: ${OCF_RESKEY_wsrep_cluster_address=${OCF_RESKEY_wsrep_cluster_address_default}}
	: ${OCF_RESKEY_cluster_host_map=${OCF_RESKEY_cluster_host_map_default}}
	: ${OCF_RESKEY_check_user=${OCF_RESKEY_check_user_default}}
	: ${OCF_RESKEY_check_passwd=${OCF_RESKEY_check_passwd_default}}
	: ${OCF_RESKEY_two_node_mode=${OCF_RESKEY_two_node_mode_default}}

	#######################################################################
	# Defaults:

	OCF_RESKEY_check_passwd_use_empty_default=0

	: ${OCF_RESKEY_check_passwd_use_empty=${OCF_RESKEY_check_passwd_use_empty_default}}

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

	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 promoted
	The 'demote' operation makes this mysql server run as unpromoted
	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>1.0</version>

	<longdesc lang="en">
	Resource script for managing galera database.
	</longdesc>
	<shortdesc lang="en">Manages a galera 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.
	The galera node names listed in this address are expected to match valid
	pacemaker node names. If both names need to differ, you must provide a
	mapping in option cluster_host_map.
	</longdesc>
	<shortdesc lang="en">Galera cluster address</shortdesc>
	<content type="string" default="${OCF_RESKEY_wsrep_cluster_address_default}"/>
	</parameter>

	<parameter name="cluster_host_map" unique="0" required="0">
	<longdesc lang="en">
	A mapping of pacemaker node names to galera node names.

	To be used when both pacemaker and galera names need to differ,
	(e.g. when galera names map to IP from a specific network interface)
	This takes the form of:
	pcmk1:node.1.galera;pcmk2:node.2.galera;pcmk3:node.3.galera

	where the galera resource started on node pcmk1 would be named
	node.1.galera in the wsrep_cluster_address
	</longdesc>
	<shortdesc lang="en">Pacemaker to Galera name mapping</shortdesc>
	<content type="string" default="${OCF_RESKEY_cluster_host_map_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="${OCF_RESKEY_check_user_default}" />
	</parameter>

	<parameter name="check_passwd" unique="0" required="0">
	<longdesc lang="en">
	Cluster check user password. Empty passwords are ignored unless
	the parameter "check_passwd_use_empty" is set to 1.
	</longdesc>
	<shortdesc lang="en">check password</shortdesc>
	<content type="string" default="${OCF_RESKEY_check_passwd_default}" />
	</parameter>

	<parameter name="check_passwd_use_empty" unique="0" required="0">
	<longdesc lang="en">
	Use an empty "check_passwd" password. If this parameter is set to 1,
	"check_passwd" will be ignored and an empty password is used
	when calling the "mysql" client binary.
	</longdesc>
	<shortdesc lang="en">check password use empty</shortdesc>
	<content type="boolean" default="${OCF_RESKEY_check_passwd_use_empty_default}"/>
	</parameter>

	<parameter name="two_node_mode" unique="0" required="0">
	<longdesc lang="en">
	If running in a 2-node pacemaker cluster, rely on pacemaker quorum
	to allow automatic recovery even when the other node is unreachable.
	Use it with caution! (and fencing)
	</longdesc>
	<shortdesc lang="en">Special recovery when running on a 2-node cluster</shortdesc>
	<content type="boolean" default="${OCF_RESKEY_two_node_mode_default}"/>
	</parameter>

	</parameters>

	<actions>
	<action name="start" timeout="120s" />
	<action name="stop" timeout="120s" />
	<action name="status" timeout="60s" />
	<action name="monitor" depth="0" timeout="30s" interval="20s" />
	<action name="monitor" role="Promoted" depth="0" timeout="30s" interval="10s" />
	<action name="monitor" role="Unpromoted" depth="0" timeout="30s" interval="30s" />
	<action name="promote" timeout="300s" />
	<action name="demote" timeout="120s" />
	<action name="validate-all" timeout="5s" />
	<action name="meta-data" timeout="5s" />
	</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=$(ocf_attribute_target $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" --quiet 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=$(ocf_attribute_target $1)
	${HA_SBIN_DIR}/crm_attribute -N $node -l reboot --name "${INSTANCE_ATTR_NAME}-no-grastate" --quiet 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=$(ocf_attribute_target $1)

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

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

	set_safe_to_bootstrap()
	{
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-safe-to-bootstrap" -v $1
	}

	get_safe_to_bootstrap()
	{
	local node=$(ocf_attribute_target $1)

	if [ -z "$node" ]; then
	${HA_SBIN_DIR}/crm_attribute -N $NODENAME -l reboot --name "${INSTANCE_ATTR_NAME}-safe-to-bootstrap" --quiet 2>/dev/null
	else
	${HA_SBIN_DIR}/crm_attribute -N $node -l reboot --name "${INSTANCE_ATTR_NAME}-safe-to-bootstrap" --quiet 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."
	}

	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
	}

	is_two_node_mode_active()
	{
	# crm_node or corosync-quorumtool cannot access various corosync
	# flags when running inside a bundle, so only count the cluster
	# members
	ocf_is_true "$OCF_RESKEY_two_node_mode" && crm_mon_no_validation -1X \| xmllint --xpath "count(//nodes/node[@type='member'])" - \| grep -q -w 2
	}

	is_last_node_in_quorate_partition()
	{
	# when a network split occurs in a 2-node cluster, pacemaker
	# fences the other node and try to retain quorum. So until
	# the fencing is resolved (and the status of the peer node
	# is clean), we shouldn't consider ourself quorate.
	local partition_members=$(${HA_SBIN_DIR}/crm_node -p \| wc -w)
	local quorate=$(${HA_SBIN_DIR}/crm_node -q)
	local clean_members=$(crm_mon_no_validation -1X \| xmllint --xpath 'count(//nodes/node[@type="member" and @unclean="false"])' -)

	[ "$partition_members" = 1 ] && [ "$quorate" = 1 ] && [ "$clean_members" = 2 ]
	}

	master_exists()
	{
	if [ "$__OCF_ACTION" = "demote" ]; then
	# We don't want to detect master instances during demote.
	# 1. we could be detecting ourselves as being master, which is no longer the case.
	# 2. we could be detecting other master instances that are in the process of shutting down.
	# by not detecting other master instances in "demote" we are deferring this check
	# to the next recurring monitor operation which will be much more accurate
	return 1
	fi
	# determine if a master instance is already up and is healthy
	ocf_version_cmp "$OCF_RESKEY_crm_feature_set" "3.1.0"
	res=$?
	if [ -z "$OCF_RESKEY_crm_feature_set" ] \|\| [ $res -eq 2 ]; then
	XMLOPT="--output-as=xml"
	ocf_version_cmp "$OCF_RESKEY_crm_feature_set" "3.2.0"
	if [ $? -eq 1 ]; then
	crm_mon_no_validation -1 $XMLOPT >/dev/null 2>&1
	if [ $? -ne 0 ]; then
	XMLOPT="--as-xml"
	fi
	fi
	else
	XMLOPT="--as-xml"
	fi
	crm_mon_no_validation -1 $XMLOPT \| grep -q -i -E "resource.id=\"${INSTANCE_ATTR_NAME}\".role=\"(Promoted\|Master)\".active=\"true\".orphaned=\"false\".*failed=\"false\""
	return $?
	}

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

	set_master_score()
	{
	local node=$(ocf_attribute_target $1)

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

	promote_everyone()
	{

	for node in $(echo "$OCF_RESKEY_wsrep_cluster_address" \| sed 's/gcomm:\/\///g' \| tr -d ' ' \| tr -s ',' ' '); do
	local pcmk_node=$(galera_to_pcmk_name $node)
	if [ -z "$pcmk_node" ]; then
	ocf_log err "Could not determine pacemaker node from galera name <${node}>."
	return
	else
	node=$pcmk_node
	fi

	set_master_score $node
	done
	}

	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"
	}

	galera_to_pcmk_name()
	{
	local galera=$1
	if [ -z "$OCF_RESKEY_cluster_host_map" ]; then
	echo $galera
	else
	echo "$OCF_RESKEY_cluster_host_map" \| tr ';' '\n' \| tr -d ' ' \| sed 's/:/ /' \| awk -F' ' '$2=="'"$galera"'" {print $1;exit}'
	fi
	}

	pcmk_to_galera_name()
	{
	local pcmk=$1
	if [ -z "$OCF_RESKEY_cluster_host_map" ]; then
	echo $pcmk
	else
	echo "$OCF_RESKEY_cluster_host_map" \| tr ';' '\n' \| tr -d ' ' \| sed 's/:/ /' \| awk -F' ' '$1=="'"$pcmk"'" {print $2;exit}'
	fi
	}


	detect_first_master()
	{
	local best_commit=0
	local last_commit=0
	local missing_nodes=0
	local nodes=""
	local nodes_recovered=""
	local all_nodes
	local best_node_gcomm
	local best_node
	local safe_to_bootstrap

	all_nodes=$(echo "$OCF_RESKEY_wsrep_cluster_address" \| sed 's/gcomm:\/\///g' \| tr -d ' ' \| tr -s ',' ' ')
	best_node_gcomm=$(echo "$all_nodes" \| sed 's/^.* $.*$$/\1/')
	best_node=$(galera_to_pcmk_name $best_node_gcomm)
	if [ -z "$best_node" ]; then
	ocf_log err "Could not determine initial best node from galera name <${best_node_gcomm}>."
	return
	fi

	# avoid selecting a recovered node as bootstrap if possible
	for node in $all_nodes; do
	local pcmk_node=$(galera_to_pcmk_name $node)
	if [ -z "$pcmk_node" ]; then
	ocf_log err "Could not determine pacemaker node from galera name <${node}>."
	return
	else
	node=$pcmk_node
	fi

	if is_no_grastate $node; then
	nodes_recovered="$nodes_recovered $node"
	else
	nodes="$nodes $node"
	fi
	done

	for node in $nodes_recovered $nodes; do
	# On clean shutdown, galera sets the last stopped node as 'safe to bootstrap',
	# so use this hint when we can
	safe_to_bootstrap=$(get_safe_to_bootstrap $node)

	# Special case for 2-node clusters: during a network split, rely on
	# pacemaker's quorum to check whether we can restart galera
	if [ "$safe_to_bootstrap" != "1" ] && [ "$node" = "$NODENAME" ] && is_two_node_mode_active; then
	is_last_node_in_quorate_partition
	if [ $? -eq 0 ]; then
	ocf_log warn "Survived a split in a 2-node cluster, considering ourselves safe to bootstrap"
	safe_to_bootstrap=1
	fi
	fi

	if [ "$safe_to_bootstrap" = "1" ]; then
	# Galera marked the node as safe to boostrap during shutdown. Let's just
	# pick it as our bootstrap node.
	ocf_log info "Node <${node}> is marked as safe to bootstrap."
	best_node=$node

	# We don't need to wait for the other nodes to report state in this case
	missing_nodes=0
	break
	fi

	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 [ $? -eq 0 ]; then
	best_node=$(ocf_attribute_target $node)
	best_commit=$last_commit
	fi

	done

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

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

	detect_safe_to_bootstrap()
	{
	local safe_to_bootstrap=""
	local uuid=""
	local seqno=""

	if [ -f ${OCF_RESKEY_datadir}/grastate.dat ]; then
	ocf_log info "attempting to read safe_to_bootstrap flag from ${OCF_RESKEY_datadir}/grastate.dat"
	safe_to_bootstrap=$(sed -n 's/^safe_to_bootstrap:\s$.$$/\1/p' < ${OCF_RESKEY_datadir}/grastate.dat)
	uuid=$(sed -n 's/^uuid:\s$.$$/\1/p' < ${OCF_RESKEY_datadir}/grastate.dat)
	seqno=$(sed -n 's/^seqno:\s$.$$/\1/p' < ${OCF_RESKEY_datadir}/grastate.dat)
	fi

	if [ -z "$uuid" ] \|\| \
	[ "$uuid" = "00000000-0000-0000-0000-000000000000" ]; then
	clear_safe_to_bootstrap
	return
	fi
	if [ "$safe_to_bootstrap" = "1" ]; then
	if [ -z "$seqno" ] \|\| [ "$seqno" = "-1" ]; then
	clear_safe_to_bootstrap
	return
	fi
	fi

	if [ "$safe_to_bootstrap" = "1" ] \|\| [ "$safe_to_bootstrap" = "0" ]; then
	set_safe_to_bootstrap $safe_to_bootstrap
	else
	clear_safe_to_bootstrap
	fi
	}

	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"
	local recovery_file_regex='s/.WSREP\:.position\srecovery.--log_error='\''$[^'\'']$'\''./\1/p'
	local recovered_position_regex='s/.WSREP\:\s[R\|r]ecovered\sposition.\:$.$\s$/\1/p'

	# codership/galera#354
	# Some ungraceful shutdowns can leave an empty gvwstate.dat on
	# disk. This will prevent galera to join the cluster if it is
	# configured to attempt PC recovery. Removing that file makes the
	# node fall back to the normal, unoptimized joining process.
	if [ -f ${OCF_RESKEY_datadir}/gvwstate.dat ] && \
	[ ! -s ${OCF_RESKEY_datadir}/gvwstate.dat ]; then
	ocf_log warn "empty ${OCF_RESKEY_datadir}/gvwstate.dat detected, removing it to prevent PC recovery failure at next restart"
	rm -f ${OCF_RESKEY_datadir}/gvwstate.dat
	fi

	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)
	chown $OCF_RESKEY_user:$OCF_RESKEY_group $tmp

	# 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'"

	$SU - $OCF_RESKEY_user -s /bin/sh -c \
	"${OCF_RESKEY_binary} $recover_args --wsrep-recover --log-error=$tmp 2>/dev/null"

	last_commit="$(cat $tmp \| sed -n $recovered_position_regex \| tail -1)"
	if [ -z "$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

	local recovery_file="$(cat $tmp \| sed -n $recovery_file_regex)"
	if [ -e $recovery_file ]; then
	cat $recovery_file \| 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"
	$SU - $OCF_RESKEY_user -s /bin/sh -c \
	"${OCF_RESKEY_binary} $recover_args --wsrep-recover \
	--tc-heuristic-recover=rollback --log-error=$tmp 2>/dev/null"

	last_commit="$(cat $tmp \| sed -n $recovered_position_regex \| tail -1)"
	if [ ! -z "$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
	fi
	rm -f $tmp
	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
	}

	# For galera, promote is really start
	galera_promote()
	{
	local rc
	local extra_opts
	local bootstrap
	local safe_to_bootstrap
	master_exists
	if [ $? -eq 0 ]; then
	# join without bootstrapping
	extra_opts="--wsrep-cluster-address=${OCF_RESKEY_wsrep_cluster_address}"
	else
	bootstrap=$(is_bootstrap)

	if ocf_is_true $bootstrap; then
	# The best node for bootstrapping wasn't cleanly shutdown. Allow
	# bootstrapping anyways
	if [ "$(get_safe_to_bootstrap)" = "0" ]; then
	sed -ie 's/^$safe_to_bootstrap:$ 0/\1 1/' ${OCF_RESKEY_datadir}/grastate.dat
	ocf_log info "safe_to_bootstrap in ${OCF_RESKEY_datadir}/grastate.dat set to 1 on node ${NODENAME}"
	fi
	ocf_log info "Node <${NODENAME}> is bootstrapping the cluster"
	extra_opts="--wsrep-cluster-address=gcomm://"
	else
	# We are being promoted without having the bootstrap
	# attribute in the CIB, which means we are supposed to
	# join a cluster; however if we end up here, there is no
	# Master remaining right now, which means there is no
	# cluster to join anymore. So force a demotion, and and
	# let the RA decide later which node should be the next
	# bootstrap node.
	ocf_log warn "There is no running cluster to join, demoting ourself"
	clear_master_score
	return $OCF_SUCCESS
	fi
	fi

	galera_monitor
	if [ $? -eq $OCF_RUNNING_MASTER ]; then
	if ocf_is_true $bootstrap; then
	promote_everyone
	clear_bootstrap_node
	ocf_log info "boostrap node already up, promoting the rest of the galera instances."
	fi
	clear_safe_to_bootstrap
	clear_last_commit
	return $OCF_SUCCESS
	fi

	# last commit/safe_to_bootstrap flag are no longer relevant once promoted
	clear_last_commit
	clear_safe_to_bootstrap

	mysql_common_prepare_dirs
	mysql_common_start "$extra_opts"
	rc=$?
	if [ $rc != $OCF_SUCCESS ]; then
	return $rc
	fi

	+ # At this point, the mysql pidfile is created on disk and the
	+ # mysql server is reacheable via its UNIX socket. If we are a
	+ # joiner, SST transfers (rsync) have finished, but an IST may
	+ # still be requested or ongoing
	+
	galera_monitor
	rc=$?
	if [ $rc != $OCF_SUCCESS -a $rc != $OCF_RUNNING_MASTER ]; 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
	-
	if ocf_is_true $bootstrap; then
	promote_everyone
	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
	ocf_log info "Bootstrap complete, promoting the rest of the galera instances."
	else
	# if this is not the bootstrap node, make sure this instance
	# syncs with the rest of the cluster before promotion returns.
	wait_for_sync
	# sync is done, clear info about last startup
	clear_no_grastate
	fi

	ocf_log info "Galera started"
	return $OCF_SUCCESS
	}

	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_no_grastate
	clear_safe_to_bootstrap

	# Clear master score here rather than letting pacemaker do so once
	# demote finishes. This way a promote cannot take place right
	# after this demote even if pacemaker is requested to do so. It
	# will first have to run a start/monitor op, to reprobe the state
	# of the other galera nodes and act accordingly.
	clear_master_score

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

	galera_start()
	{
	local rc
	local galera_node

	galera_node=$(pcmk_to_galera_name $NODENAME)
	if [ -z "$galera_node" ]; then
	ocf_exit_reason "Could not determine galera name from pacemaker node <${NODENAME}>."
	return $OCF_ERR_CONFIGURED
	fi

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

	galera_monitor
	if [ $? -eq $OCF_RUNNING_MASTER ]; then
	ocf_exit_reason "master galera instance started outside of the cluster's control"
	return $OCF_ERR_GENERIC
	fi

	mysql_common_prepare_dirs

	detect_safe_to_bootstrap
	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, setting master score so this instance will join galera cluster."
	set_master_score $NODENAME
	else
	clear_master_score
	detect_first_master
	fi

	return $OCF_SUCCESS
	}

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

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

	mysql_common_status $status_loglevel
	rc=$?

	if [ $rc -eq $OCF_NOT_RUNNING ]; then
	last_commit=$(get_last_commit $node)
	if [ -n "$last_commit" ]; then
	# if last commit is set, this instance is considered started in slave mode
	rc=$OCF_SUCCESS
	master_exists
	if [ $? -ne 0 ]; then
	detect_first_master
	else
	# a master instance exists and is healthy, promote this
	# local read only instance
	# so it can join the master galera cluster.
	set_master_score
	fi
	fi
	return $rc
	elif [ $rc -ne $OCF_SUCCESS ]; then
	return $rc
	fi

	# if we make it here, mysql is running. Check cluster status now.
	galera_node=$(pcmk_to_galera_name $NODENAME)
	if [ -z "$galera_node" ]; then
	ocf_exit_reason "Could not determine galera name from pacemaker node <${NODENAME}>."
	return $OCF_ERR_CONFIGURED
	fi

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

	is_primary
	if [ $? -eq 0 ]; then

	if ocf_is_probe; then
	# restore master score during probe
	# if we detect this is a master instance
	set_master_score
	fi
	rc=$OCF_RUNNING_MASTER
	else
	- ocf_exit_reason "local node <${NODENAME}> is started, but not in primary mode. Unknown state."
	- rc=$OCF_ERR_GENERIC
	+ # It seems that with recent galera (26.4+), a joiner that is
	+ # connected to a Primary component and is preparing its IST
	+ # request might still temporarily report its state as
	+ # Non-Primary. Do not fail in this case as the promote
	+ # operation will loop until the IST finishes or the promote
	+ # times out.
	+ if [ "$__OCF_ACTION" = "promote" ] && ! ocf_is_true $(is_bootstrap); then
	+ ocf_log info "local node <${NODENAME}> is receiving a State Transfer."
	+ else
	+ ocf_exit_reason "local node <${NODENAME}> is started, but not in primary mode. Unknown state."
	+ rc=$OCF_ERR_GENERIC
	+ fi
	fi

	return $rc
	}

	galera_stop()
	{
	local rc
	# make sure the process is stopped
	mysql_common_stop
	rc=$1

	clear_safe_to_bootstrap
	clear_last_commit
	clear_master_score
	clear_bootstrap_node
	clear_no_grastate
	return $rc
	}

	galera_validate()
	{
	if [ "$OCF_CHECK_LEVEL" -eq 10 ]; then
	if ! ocf_is_ms; then
	ocf_exit_reason "Galera must be configured as a multistate Master/Slave resource."
	return $OCF_ERR_CONFIGURED
	fi
	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

	[ "$__OCF_ACTION" = "start" ] && OCF_CHECK_LEVEL=10
	galera_validate
	rc=$?
	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 ocf_is_true "${OCF_RESKEY_check_passwd_use_empty}"; then
	MYSQL_OPTIONS_CHECK="$MYSQL_OPTIONS_CHECK --password="
	elif [ -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) mysql_common_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:

File Metadata

Mime Type: text/x-diff
Expires: Sat, Nov 23, 3:39 PM (16 h, 10 m)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 1018855
Default Alt Text: (37 KB)

No OneTemporaryActions

View Options

File Metadata

Event Timeline

No OneTemporary
Actions