Automatic scheduled backup of remote MySQL scripts

Script complete process

1. Connect to remote server
2. Get into docker-mysql
3. perform mysqladmin -P3306 -u$user-p$pwd1 flush-logs, Yes binlog Cut off , return binlog file name
4. Get the file name locally , Pull the corresponding file from the remote server to the local
5. perform mysqlbinlog /bak/incre_dc/$b|mysql-u$acc -p$pwd1 -f, hold binlog Import the file to local mysql
6. hold incre.sh Join the local scheduled task crontab -e that will do , Once every two days
   #0 1 */2 * * cd /incre_micro;./incre.sh # there cd Be similar to docker Of workspace
7. Added the judgment of the last backup time

About some shell Script use :

1. There must be no spaces on both sides of the equal sign of variable assignment

#shell : command not found 
a="a=000017"
a_str="a="

2. The string contains [[]] Is the key , There should be no less space on both sides

# shell [: missing `]
if [[ "$a" == *$a_str* ]];then ...
if [[ "$a" =~ $a_str* ]];then ...

3. shell Intercepting string

e="mysql-bin.000016|2021-01-27 11:01:35"
${e%|*}
# mysql-bin.000016

4. shell Add and subtract numbers

a='154'
b=$(($a-1))
echo $b

# Greater than  -gt (greater than)
# Less than  -lt (less than)
# Greater than or equal to  -ge (greater than or equal)
# Less than or equal to  -le (less than or equal)
# It's not equal  -ne （not equal）

5. shell Display the penultimate line of the file

tail -n 2 history.log |head -n 1

6. shell Time format

echo "`date '+%Y-%m-%d %H:%M:%S'`"

Full script

incre.sh

#!/bin/bash
# Service address 
srv=127.0.0.1
# Backup days 
delay=1
# Database directory (remote_db)
dir=/data/
# account number (local_db)
acc=root
# password (local_db)
pwd1=root
# Container name (local_db)
container_local=mysql_1
# Historical backup records 
history_file=history.log
# Server execution log 
file_name=file.log
perfix=mysql-bin.
a=0
a_str='a='
echo "$(ssh -Tq $srv < ./ssh.sh)" > $file_name
a=$(tail -n 1 $file_name)
echo "$a"
b=$perfix${a:2}
c_date=`date '+%Y-%m-%d %H:%M:%S'`
d_date=`date '+%Y-%m-%d'`

if [  -f $history_file ];then
temp_h=$(tail -n 1 $history_file)
temp_d=${temp_h#*|}
tmep=${temp_h%|*}
echo "$b $temp $((${d_date//-}-$delay)) "
# Last backup time >( same day -delay Days )
 if [ ${temp_d//-} -gt $((${d_date//-}-$delay))  ];then
    echo "$c_date $b  Backup failed : Last backup time :$temp_d"
    exit
 fi
fi

if [[ $a != 0 ]] &&  [[ "$a"  =~ $a_str* ]];then
      echo "Contains the correct file name !!!"
  else
      echo "$c_date $b  Backup failed : Wrong format ( example :a=00001)"
      exit
fi

echo "`date '+%Y-%m-%d %H:%M:%S'` scp  Start !!! $b "
echo $srv:$dir$b
scp $srv:$dir$b  ./
if [ ! -f $history_file ];then
    echo " Perform backup for the first time "
    echo "$b|$d_date" > $history_file
else
    echo "$b|$d_date" >> $history_file
fi
echo "`date '+%Y-%m-%d %H:%M:%S'`, Start importing database "
echo "exec ==> docker exec $container_local bash -c \"mysqlbinlog /bak/incre_dc/$b | mysql -u$acc -p$pwd1 -f \""
docker exec $container_local  bash -c "mysqlbinlog /bak/incre_dc/$b | mysql -u$acc -p$pwd1 -f"
echo "`date '+%Y-%m-%d %H:%M:%S'`, Import complete "
echo "`date '+%Y-%m-%d %H:%M:%S'` $b  End of backup "
exit

Send this script to remote execution
cat ssh.sh

#!/bin/bash
# Database directory (remote_db)
dir=/data/
# user name (remote_db)
user=root
# password (remote_db)
pwd1=root
# Container name (remote_db)
container_remote=mysql-m1_1
index=mysql-bin.index
sp=mysql-bin.

d_date=`date '+%Y%m%d'`
cd $dir

ft=$(stat -c %Y $index)
ft=`date -d @$ft "+%Y%m%d"`
echo "$d_date $ft"
# current time ( God )> Last modified ( God )
if [ $d_date -gt $ft ]; then
docker exec $container_remote  mysqladmin -P3306  -u$user -p$pwd1  flush-logs
  echo " The day has flush"
else
  echo " The day has flush, There is no need to repeat ,$d_date,$ft"
fi
# Take the file name on the penultimate line 
a=$(tail -n 2 $index | head -n 1| awk -F$sp '{print $2 }')
echo "a=$a"

=========================================>>>>>>>>>>>>>>>> Split line
Script from a long time ago , Compare low,
By the way shell Basic use of ,