mysql主從(主備)同步一鍵配置,配自動檢測功能
阿新 • • 發佈：2019-01-10
主從一鍵shell配置
做個筆記。
#!/bin/bash
#Mysql sync
#chenglee
#master機器ip
MasterIP="192.168.137.174"
#slave機器ip
SlaveIp="192.168.137.170"
#主從同步賬號密碼
MASTER_USER="sync"
MASTER_PASSWORD="sync"
#master機mysql登入賬號密碼
Muser="root"
Mpass="123456"
#slave機mysql登入賬號密碼
Suser="root"
Spass="123456"
#slave機ssh的登入賬號密碼
SSHuser="root"
SSHpass="lizhenghua"
function Master(){
#MASTER
function create(){
mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "flush PRIVILEGES;" >/dev/null 2>&1
mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "CREATE USER '${MASTER_USER}'@'${SlaveIp}' IDENTIFIED BY '${MASTER_PASSWORD}';" >/dev/null 2>&1
mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "grant replication slave on *.* to '${MASTER_USER}'@'${SlaveIp}' identified by '${MASTER_PASSWORD}';" >/dev/null 2>&1
mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "flush PRIVILEGES;" >/dev/null 2>&1
}
#my.cnf
function addbin(){
number=`cat -n /etc/my.cnf | grep -F "[mysqld]" | awk '{print$1}'`
serverID=`echo ${MasterIP} | awk -F'.' '{print$NF}'`
text1="server-id=${serverID}"
text2="log-bin=mysql-bin"
text3="lower_case_table_names=1"
sed -i "${number}a\\${text1}\n${text2}\n${text3}" /etc/my.cnf
}
#restart
function Mrestart(){
service mysql restart
}
#ssh
function mstscSSH(){
echo -e "\033[43;35m 開始配置雙機互動，請按回車後輸入slave機登入密碼 \033[0m"
ssh-keygen -N ''
ssh-copy-id ${SSHuser}@${SlaveIp}
}
echo "建立同步賬號"
create
echo "新增master端id到my.cnf檔案"
addbin
echo "重啟master端資料庫"
Mrestart
echo "開始賬號互動"
mstscSSH
}
#SLAVE
function Slave(){
#my.cnf
function addbin2(){
Snumber2=`ssh ${SSHuser}@${SlaveIp} "cat -n /etc/my.cnf | grep -F "[mysqld]" | awk '{print$1}'" | awk '{print$1}'`
SserverID2=`echo ${SlaveIp} | awk -F'.' '{print$NF}'`
Stext1="server-id=${SserverID2}"
Stext3="lower_case_table_names=1"
ssh ${SSHuser}@${SlaveIp} "sed -i '${Snumber2}a\\${Stext1}\n${Stext3}' /etc/my.cnf"
}
#restart
function Srestart(){
ssh ${SSHuser}@${SlaveIp} "service mysql restart"
}
function Ssync(){
mkdir logs
mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show master status;" > logs/chenglee.logs
MASTER_HOST=${MasterIP}
MASTER_LOG_FILE=`cat logs/chenglee.logs | tail -n 1 | awk '{print$1}'`
MASTER_LOG_POS=`cat logs/chenglee.logs | tail -n 1 | awk '{print$2}'`
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"stop slave;\"" >/dev/null 2>&1
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"reset slave;\"" >/dev/null 2>&1
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"reset slave all;\"" >/dev/null 2>&1
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}, MASTER_CONNECT_RETRY=10;\"" >/dev/null 2>&1
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"start slave;\"" >/dev/null 2>&1
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"show slave status \G;\"" > logs/slave_sync.logs
}
echo "新增master端id到my.cnf檔案"
addbin2
echo "重啟slave端資料庫"
Srestart
echo "開始同步配置"
Ssync
}
#校準同步
#:提示
#當發現主從同步失敗的時候， 開啟此選項則自動檢測並重新配置同步
function calibrate(){
mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show master status;" > logs/chenglee.logs
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"show slave status \G;\"" > logs/slave_sync.logs
MASTER_HOST=${MasterIP}
MASTER_LOG_FILE=`cat logs/chenglee.logs | tail -n 1 | awk '{print$1}'`
MASTER_LOG_POS=`cat logs/chenglee.logs | tail -n 1 | awk '{print$2}'`
string1=`cat logs/slave_sync.logs | sed -n '12,13p' | awk -F ':' '{print$2}' | head -n 1`
string2=`cat logs/slave_sync.logs | sed -n '12,13p' | awk -F ':' '{print$2}' | head -n 2 | tail -n 1`
if [ ${string1} = ${string2} ];then
if ( echo ${string1} |grep -q 'Yes' && echo ${string2} |grep -q 'Yes' );then
echo "主從已同步，無需校準"
else
echo "1主從已斷開，準備校準"
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"stop slave;\""
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"reset slave;\""
ssh ${SSHuser}@${SlaveIp} "service mysql restart"
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}\""
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"start slave;\""
echo "1校準成功"
fi
exit
else
echo "2主從已斷開，準備校準"
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"stop slave;\""
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"reset slave;\""
ssh ${SSHuser}@${SlaveIp} "service mysql restart"
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}\""
ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e \"start slave;\""
echo "2校準成功"
fi
}
function main(){
Master
Slave
#calibrate
}
main