mysql5.6备份

备份之前：

最初的二进制信息：

mysql> show master logs;

+------------------+-----------+

| Log_name | File_size |

+------------------+-----------+

| mysql-bin.000001 | 69417 |

| mysql-bin.000002 | 1388213 |

| mysql-bin.000003 | 120 |

+------------------+-----------+

3 rows in set (0.00 sec)

导入库信息：

source /tmp/estore.sql;

再次查询二进制日志信息：

mysql> show master logs;

+------------------+-----------+

| Log_name | File_size |

+------------------+-----------+

| mysql-bin.000001 | 69417 |

| mysql-bin.000002 | 1388213 |

| mysql-bin.000003 | 964116 |

+------------------+-----------+

3 rows in set (0.00 sec)

然后开始备份：

#mysqldump --all-databases --flush-logs --lock-all-tables --master-data=2 > /backup/all.sql

查看备份完成后的二进制日志信息：

mysql> show master logs;

+------------------+-----------+

| Log_name | File_size |

+------------------+-----------+

| mysql-bin.000001 | 69417 |

| mysql-bin.000002 | 1388213 |

| mysql-bin.000003 | 964163 |

| mysql-bin.000004 | 120 |

+------------------+-----------+

4 rows in set (0.00 sec)

在all.sql中也可以查看：

less all.sql

-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000004', MASTER_LOG_POS=120;

备份：

备份的时候，不能在该服务器上把所有的数据文件都删除后仔导入备份的sql，这样备份并不能成功

现在将导出的sql复制到另一台数据库做测试

scp /backup/all.sql 192.168.223.128:/tmp

然后在备份机上导入备份的数据（导入数据的时候可以在打开的session连接中暂时关闭sql_log_bin=0，不记录二进制日志，导完数据之后再开启）

source /tmp/all.sql;

验证：

mysql> show tables;

+------------------------+

| Tables_in_estore |

+------------------------+

| cart |

| goods |

| orderitems |

| orders |

| province_city_district |

| user |

+------------------------+

6 rows in set (0.00 sec)

 

mysql> select count(*) from province_city_district;

+----------+

| count(*) |

+----------+

| 3522 |

+----------+

1 row in set (0.00 sec)

以上的完全备份就是每周日的凌晨三点执行，然后进行每天凌晨三点的模拟备份

在刚刚备份的那台主机上新增操作，记录二进制日志

mysql> create database mydb;

Query OK, 1 row affected (0.00 sec)

 

mysql> use mydb;

Database changed

mysql> create table student(sid int,sname char(30));

Query OK, 0 rows affected (0.01 sec)

 

mysql> insert into student values (1,'wadeson');

Query OK, 1 row affected (0.00 sec)

 

mysql> insert into student values (2,'jsonhc');

Query OK, 1 row affected (0.01 sec)

假设上述就是今天的所有的操作记录，然后根据二进制信息，进行今天的备份：

由于进行的完全备份时候的二进制position为：

| mysql-bin.000004 | 120 |

所以今天凌晨三点的备份则为：

先查看凌晨三点时刻的二进制信息：

mysql> show master logs;

+------------------+-----------+

| Log_name | File_size |

+------------------+-----------+

| mysql-bin.000001 | 69417 |

| mysql-bin.000002 | 1388213 |

| mysql-bin.000003 | 964163 |

| mysql-bin.000004 | 779 |

此时，备份语句则为：

mysqlbinlog mysql-bin.000004 --start-position=120 --stop-position=779 > /backup/monday.sql

这就是假设的monday到星期二凌晨三点的操作

将备份的增量数据传送到测试机：

scp /backup/monday.sql 192.168.223.128:/tmp

然后进行测试：

mysql> source /tmp/monday.sql;

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| estore |

| mydb |

| mysql |

| performance_schema |

| test |

+--------------------+

6 rows in set (0.00 sec)

mysql> use mydb;

Database changed

mysql> show tables;

+----------------+

| Tables_in_mydb |

+----------------+

| student |

+----------------+

1 row in set (0.00 sec)

mysql> select * from student;

+------+---------+

| sid | sname |

+------+---------+

| 1 | wadeson |

| 2 | jsonhc |

+------+---------+

2 rows in set (0.00 sec)

 

注意：每一次进行备份的时候，同时保存备份时刻的二进制日志信息

查看此时的二进制：

[root@wadeson ~]# mysql -e "show master status\G"|grep File|awk -F": " '{print $2}'

mysql-bin.000004

[root@wadeson ~]# mysql -e "show master status\G"|grep Position|awk -F": " '{print $2}'

在mysql5.6版本时候，执行mysql有关密码的脚本时，都会提醒：

[root@wadeson scripts]# sh bakcup_mysql.sh

Warning: Using a password on the command line interface can be insecure.

解决办法：

[root@wadeson ~]# mysql_config_editor set --login-path=root --host=localhost --user=root --password

Enter password:                         这里输入root的密码

[root@wadeson ~]# mysql_config_editor print --all                     打印已经设置的

[local]

user = username

password = *****

host = localhost

[root]

user = root

password = *****

host = localhost

由于这里使用的是root夫人用户执行mysqldump脚本，如果用其他的用户，上述命令修改对应的地方就行

[root@wadeson scripts]# mysql --login-path=root -e "show master status;"

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000008 | 120 | | | |

+------------------+----------+--------------+------------------+-------------------+

然后在外面执行语句就不会有提醒了

 

 

现在执行脚本：完全备份

#!/bin/bash
MYSQL_CMD="/usr/local/mysql/bin/mysql"
MYSQLDUMP="/usr/local/mysql/bin/mysqldump"
DATE=`date +%F`

# backup mysql
${MYSQLDUMP} --login-path=root --all-databases --flush-logs --lock-all-tables --master-data=2|gzip > /backup/${DATE}.sql.gz

# save mysql-bin log
binlog=`${MYSQL_CMD} --login-path=root -e "show master status\G"|grep File|awk -F": " '{print $2}'`
pos=`${MYSQL_CMD} --login-path=root -e "show master status\G"|grep Position|awk -F": " '{print $2}'`
echo "$binlog" >> /backup/binlog/${DATE}.log
echo "$pos" >> /backup/binlog/${DATE}.log

执行完完全备份后，将二进制信息保存到一个日志文件中

增量备份脚本，将上面保存的二进制信息的log文件修改为23号，然后备份今天24号的增量

每一次完全备份后，都会刷新一下二进制日志，将此时的二进制信息写入到一个日志文件中，方便后面增量备份使用

 

执行得到的文件和binlog日志信息：进行增量备份

将上一次的binlog日志信息和这一次的binlog日志信息做对比

#!/bin/bash

MYSQL_CMD="/usr/local/mysql/bin/mysql"
MYSQLBINLOG="/usr/local/mysql/bin/mysqlbinlog"
DATE=`date +%F`
OLDDATE=`date +%F -d '-1 day'`

# get mysql-bin and position
binlog=`${MYSQL_CMD} --login-path=root -e "show master status\G"|grep File|awk -F": " '{print $2}'`
pos=`${MYSQL_CMD} --login-path=root -e "show master status\G"|grep Position|awk -F": " '{print $2}'`
old_binlog=`cat /backup/binlog/${OLDDATE}.log|sed -n '1p'`
old_pos=`cat /backup/binlog/${OLDDATE}.log|sed -n '2p'`
echo "$binlog" >> /backup/binlog/${DATE}.log
echo "$pos" >> /backup/binlog/${DATE}.log

# backup mysql
if [ $binlog = ${old_binlog} ];then
    ${MYSQLBINLOG} /data/mysql/${binlog} --start-position=${old_pos} --stop-position=$pos > /backup/${DATE}.sql
else
    ${MYSQLBINLOG} /data/mysql/${old_binlog} /data/mysql/${binlog} --start-position=${old_pos} --stop-position=$pos > /backup/${DATE}.sql
fi

　

[root@wadeson backup]# cat binlog/2017-08-23.log
mysql-bin.000010
120
[root@wadeson backup]# cat binlog/2017-08-24.log
mysql-bin.000010
568