Shell: 分享MySQL数据同步+主从复制自动化脚本

做mysql主从复制，要锁master表，导出数据，解锁master表，同步数据，查master的log偏移，配置slave的log偏移,开启slave复制。如果是做双向同步，还得再来一遍。麻烦死！

使用这个脚本，可以省不少时间。

作用：运行于mysql slave服务器上，添加到crontab计划任务里，可定期同步数据，并重置mysql slave配置。

使用方法：

my.cnf配置过程略。

配置好shell里的主服务器ip，用户名，密码。

手动创建rep用户，密码password.

添加到计划任务里，OK。

写的乱，有时间再梳毛。

#!/bin/bash

cd /opt/db_sync
timestamp=$(date +%Y%m%d_%H%M%S)

HOSTNAME_EX="192.168.100.100"                                           #数据库Server信息
HOSTNAME="127.0.0.1"                                           #数据库Server信息
#HOSTNAME="mysql"                       #数据库Server信息
PORT="3306"
USERNAME="user"
#PASSWORD="password"
export MYSQL_PWD="password"

DBNAME=$1                                              #要创建的数据库的库名称
#DBNAME="test_db_name"                                              #要创建的数据库的库名称
TABLENAME="test_table_name"                                  #要创建的数据库的表的名称

export PATH=.:$PATH

#MYSQL_CMD="mysql -h${HOSTNAME}  -P${PORT}  -u${USERNAME} -p${PASSWORD}"
MYSQL_CMD="mysql -h${HOSTNAME}  -P${PORT}  -u${USERNAME} "
MYSQL_CMD_EX="mysql -h${HOSTNAME_EX}  -P${PORT}  -u${USERNAME}"
#echo ${MYSQL_CMD}

#sql="show slave status \G"
#echo ${sql}  | ${MYSQL_CMD} |grep Slave_IO_Running: 
#echo ${sql}  | ${MYSQL_CMD} |grep Slave_SQL_Running:
#if [ $? -ne 0 ]                                                                                #判断是否创建成功
#then
# echo "connecting databases ${DBNAME} failed ..."
# exit 1
#fi

################################################################################
echo "master: lock master tables..."
sql="flush tables with read lock;"
echo ${sql}  | ${MYSQL_CMD_EX} 

sql="show master status \G"
#echo ${sql}  | ${MYSQL_CMD_EX} |grep File
#echo ${sql}  | ${MYSQL_CMD_EX} |grep Position
FILE=$(echo ${sql}  | ${MYSQL_CMD_EX} |grep File|awk '{ print $2}')
POSITION=$(echo ${sql}  | ${MYSQL_CMD_EX} |grep Position|awk '{ print $2}')
echo $FILE
echo $POSITION
#################################################
sql="stop slave ;"
echo ${sql}  | ${MYSQL_CMD} |grep Slave_IO_Running: 

echo "get dbname_master.sql..."
mysqldump -h192.168.100.100 -uuser dbname > dbname_master..sql

sql="drop database IF EXISTS dbname ;"
echo ${sql}  | ${MYSQL_CMD} 
sql="create database IF NOT EXISTS dbname DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;"
echo ${sql}  | ${MYSQL_CMD} 

echo "import dbname_master.sql to db_slave ..."
mysql -uuser dbname<./dbname_master.sql

#####################################################
echo "master: unlock master tables..."
sql="unlock tables ;"
echo ${sql}  | ${MYSQL_CMD_EX} 

#####################################################
sql="reset slave ;"
echo ${sql}  | ${MYSQL_CMD}  

#rep用户手动创建，分配权限
sql="change master to master_host='192.168.100.100',master_user='rep',master_password='password',master_log_file='$FILE',master_log_pos=$POSITION;"
echo $sql
echo ${sql}  | ${MYSQL_CMD}

sql="start slave ;"
echo ${sql}  | ${MYSQL_CMD}

sleep 3
sql="show slave status \G"
#echo ${sql}  | ${MYSQL_CMD}

echo "=================================================="
echo ${sql}  | ${MYSQL_CMD} |grep Slave_IO_Running: 
echo ${sql}  | ${MYSQL_CMD} |grep Slave_SQL_Running:

echo "$timestamp db_sync OK!">> db_sync.log

Shell: 分享MySQL数据同步+主从复制自动化脚本

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