#!/bin/bash
#
#       setup mysql replication.
#       run this script parallel on both servers as we need log file name and position on the other node
#
#

ROOT_PASS="rootP@ssw0rd"
REPLI_PASS="replicationP@ssw0rd"
SIBLING_IP="1.2.3.4"
SERVER_ID=1     # first server is 1, second is 2


###
REPLI_USER="replicator"
MCLIENT="mysql -uroot -p$ROOT_PASS"
CONFFILE="/etc/mysql/conf.d/repli.cnf"
[ -d /etc/mysql/mariadb.conf.d ] && CONFFILE="/etc/mysql/mariadb.conf.d/72-repli.cnf"
set -e


# add config file
echo "[mysqld]
server-id=$SERVER_ID
log-bin=\"mysql-bin\"
binlog-ignore-db=test
binlog-ignore-db=information_schema
replicate-ignore-db=test
replicate-ignore-db=information_schema
relay-log=\"mysql-relay-log\"
auto-increment-increment = 2
auto-increment-offset = $SERVER_ID
bind-address = 0.0.0.0
" >$CONFFILE && echo "$CONFFILE created"


# create replicator user. drop first manually if already exists
echo "Create user $REPLI_USER"
echo "
CREATE USER $REPLI_USER@'%' IDENTIFIED BY '$REPLI_PASS';
GRANT REPLICATION SLAVE ON *.* TO $REPLI_USER@'%' IDENTIFIED BY '$REPLI_PASS';
" | $MCLIENT

service mysql restart

echo "---enter these on $SIBLING_IP:-----------";
echo "SHOW MASTER STATUS;"|$MCLIENT
echo "-------------------------------------";
echo -n "enter  File  as  shown  on $SIBLING_IP: ";read repliFile
echo -n "enter Position as shown on $SIBLING_IP: ";read repliPosition

echo "
STOP SLAVE;
CHANGE MASTER TO MASTER_HOST = '$SIBLING_IP', MASTER_USER = '$REPLI_USER', MASTER_PASSWORD = '$REPLI_PASS', \
MASTER_LOG_FILE = '$repliFile', MASTER_LOG_POS = $repliPosition;
START SLAVE;
" |$MCLIENT

service mysql restart