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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\s*recovery.*--log_error='\''\([^'\'']*\)'\''.*/\1/p'
local recovered_position_regex='s/.*WSREP\:\s*[R|r]ecovered\s*position.*\:\(.*\)\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:

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