mysql 热备份
获取版本号
mysql -u root -p
Enter password:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
删除mysql
1.sudo apt-get autoremove --purge mysql-server-5.5
2.sudo apt-get remove mysql-common
清理残留数据
dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
去掉地址绑定
nano /etc/mysql/my.cnf #编辑配置文件
找到bind-address = 127.0.0.1
改为
#bind-address = 127.0.0.1
mysql> create database aaa;
mysql> use aaa;
mysql> create table `mytesttable` ( name varchar(20));
mysql> create table bbb(name varchar(30));
mysql> show tables;
+---------------+
| Tables_in_aaa |
+---------------+
| bbb |
| mytesttable |
+---------------+
2 rows in set (0.00 sec)
mysql>quit
a@ubuntu:~$ sudo netstat -tap | grep mysql
a@ubuntu:/var/log$ sudo /etc/init.d/mysql restart
C:\Documents and Settings\Administrator>mysql -usync -p12345 -h192.168.1.110
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 72
Server version: 5.5.43-0ubuntu0.14.04.1 (Ubuntu)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
a@ubuntu:~$ sudo /etc/init.d/mysql start
* Starting MySQL database server mysqld [fail]
error.log
InnoDB: Check that you do not already have another mysqld process
ulimit -s unlimited
重启了虚拟机
ENGINE选项
InnoDB 带行锁定和外键的事务安全表
MyISAM二进制轻便式存储引擎，此引擎是MySQL所用的默认存储引擎
mysql> insert into tab1 values(1,'wangjinrong','10086');
mysql> select * from tab1;
+------+-------------+-------+
| id | name | phone |
+------+-------------+-------+
| 1 | wangjinrong | 10086 |
+------+-------------+-------+
1 row in set (0.00 sec)
重置master
mysql> reset master;
Query OK, 0 rows affected (0.05 sec)
mysql> exit
备份数据库
a@ubuntu:~$ mysqldump -uroot -p1 aaa -l -F > /tmp/test.sql;
a@ubuntu:~$ ls /tmp
a@ubuntu:~$ scp /tmp/test.sql 192.168.1.113:/tmp/
ssh: connect to host 192.168.1.113 port 22: Connection refused
lost connection
首先在本机执行：sudo apt-get install ssh
a@ubuntu:~$ scp /tmp/test.sql 192.168.1.113:/tmp/
The authenticity of host '192.168.1.113 (192.168.1.113)' can't be established.
ECDSA key fingerprint is 95:d3:68:6f:a5:87:26:86:29:cf:50:ca:66:a3:15:5f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.113' (ECDSA) to the list of known hosts.
[email protected]'s password: 1
test.sql 100% 1897 1.9KB/s 00:00
创建备份角色
mysql> grant replication slave on *.* to 'sync0'@'%' identified by '12345'
Query OK, 0 rows affected (0.00 sec)
mysql> show grants for [email protected] \G;
*************************** 1. row ***************************
Grants for [email protected]: GRANT ALL PRIVILEGES ON *.* TO 'user1'@'192.168.1.113' IDENTIFIED BY PASSWORD '*00A51F3F48415C7D4E8908980D443C29C69B60C9'
1 row in set (0.00 sec)
mysql> show grants for sync\G;
*************************** 1. row ***************************
Grants for sync@%: GRANT REPLICATION SLAVE ON *.* TO 'sync'@'%' IDENTIFIED BY PASSWORD '*00A51F3F48415C7D4E8908980D443C29C69B60C9'
1 row in set (0.00 sec)
从机器
mysql> reset master;
ERROR 1186 (HY000): Binlog closed, cannot RESET MASTER
恢复数据库
a@ubuntu:/tmp$ mysql -uroot -p1 aaa -v -f < /tmp/test.sql;
a@ubuntu:/tmp$ sudo gedit /etc/mysql/my.cnf;
server-id = 2
master-host = 192.168.1.103
master-user = user1
master-password = 12345
master-port = 3306
a@ubuntu:/tmp$ sudo /etc/init.d/mysql restart
* Stopping MySQL database server mysqld [ OK ]
* Starting MySQL database server mysqld [fail]
查看日志
a@ubuntu:/tmp$ gedit /var/log/mysql/error.log
150707 20:48:37 InnoDB: 5.5.43 started; log sequence number 1599144
150707 20:48:37 [ERROR] /usr/sbin/mysqld: unknown variable 'master-host=192.168.1.103'
150707 20:48:37 [ERROR] Aborting
#master-host = 192.168.1.103
#master-user = user1
#master-password = 12345
这样可以重新启动mysql
主服务器配置文件修改
[mysqld]
#bind-address = 127.0.0.1
server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
log_slow_queries = /var/log/mysql/mysql-slow.log
binlog_do_db = aaa
显示master状态
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000006 | 107 | aaa | |
+------------------+----------+--------------+------------------+
从机器的设置
[mysqld]
#bind-address = 127.0.0.1
server-id = 2
read-only
replicate-do-db = aaa
设置master的信息
mysql> change master to MASTER_HOST='192.168.1.110', MASTER_USER='sync0',MASTER_PASSWORD='12345',MASTER_LOG_FILE='mysql-bin.000006',MASTER_LOG_POS=107;
启动slave
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
查看slave状态
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.110
Master_User: sync0
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 249
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 395
Relay_Master_Log_File: mysql-bin.000006
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: aaa
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 249
Relay_Log_Space: 552
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.01 sec)