#!/bin/bash -e
#!/bin/bash -eu

#==============================================================================#
#
# http://www.fromdual.com/unbreakable-mysql-cluster-with-galera-and-lvs
# http://galeracluster.com/documentation-webpages/mysqlwsrepoptions.html#wsrep-notify-cmd
#
# /etc/mysql/galera_mariadb.cnf
#
# [mysqld]
# wsrep_notify_cmd = /var/lib/mysql/bin/wsrep_notify_cmd.sh
#
#==============================================================================#
#
# Warning!
#
# The node will block and wait until the script completes and returns before it
# can proceed. If the script performs any potentially blocking or long-running
# operations, such as network communication, you may wish initiate such
# operations in the background and have the script return immediately.
#
#==============================================================================#
#
# SET GLOBAL wsrep_notify_cmd='/var/lib/mysql/bin/wsrep_notify_cmd.sh';
# SHOW VARIABLES LIKE 'wsrep_notify_cmd';
#
#==============================================================================#

#MYIP=''
VERSION="v2017110800"

LOG="/var/log/mysql/wsrep_notify_cmd.log"
#ETC="/etc/mysql/conf.d/wsrep.cnf"
#ETC="/home/mysql/data/mysql-5.5-wsrep-23.7-a/my.cnf"
ETC="/etc/mysql/galera_mariadb.cnf"

DATUM_ZEIT="$(date +'%Y-%m-%d %H:%M:%S')"
echo "${DATUM_ZEIT}" >>${LOG}
echo "${0} ${@}" >>${LOG}

#------------------------------------------------------------------------------#

#regex='^.*=\s*([0-9]+.[0-9]+.[0-9]+.[0-9]+).*'
#
#str=$(grep -E "^wsrep_node_incoming_address" ${ETC} 2>>${LOG})
#
#if [[ ${str} =~ ${regex} ]] ; then
#       MYIP=${BASH_REMATCH[1]}
#else
#       echo "Cannot find IP address in ${str}" >>${LOG}
#       exit 1
#fi

#------------------------------------------------------------------------------#

while [ "${#}" -gt "0" ] ; do
        case "${1}" in
                --status)
                        # Undefined, Joiner, Donor, Joined, Synced, Error
                        STATUS="$2"
                        shift
                        ;;
                --uuid)
                        # The cluster state UUID.
                        CLUSTER_UUID="$2"
                        shift
                        ;;
                --primary)
                        # yes, no
                        PRIMARY="$2"
                        shift
                        ;;
                --index)
                        # The index of this node in the node list.
                        INDEX="$2"
                        shift
                        ;;
                --members)
                        # eine durch Komma getrennte Liste mit UUIDs
                        MEMBERS="$2"
                        shift
                        ;;
        esac
        shift
done

#------------------------------------------------------------------------------#

# echo $* >> ${LOG}
echo "
STATUS=${STATUS}
CLUSTER_UUID=${CLUSTER_UUID}
PRIMARY=${PRIMARY}
INDEX=${INDEX}
MEMBERS=${MEMBERS}
" >>${LOG}

# Undefined means node is shutting down
# Synced means node is ready again
#if [ "${STATUS}" = "Synced" -a "${PRIMARY}" = "[Yy][Ee][Ss]" ] ; then
if [ "${STATUS}" = "Synced" ] ; then
        #DB_STAT="System ist bereit: ${STATUS},${PRIMARY}"
        DB_STAT="System ist bereit: ${STATUS}"
else
        #DB_STAT="System ist nicht bereit: ${STATUS},${PRIMARY}"
        DB_STAT="System ist nicht bereit: ${STATUS}"
fi

echo "${DB_STAT}" >>${LOG}
echo "ret=$?" >>${LOG}
echo "#------------------------------------------------------------------------------#" >>${LOG}

exit 0