下面以在DB1（192.168.0.10）的配置為例，DB2的配置基本一樣，只要修改my.cnf中的server_id =2
1. 安裝mysql-server
db1# apt-get install mysql-server
注：
? 如果安裝有問題，執行apt-getupdate更新源後再重試
? 安裝過程中需要輸入root密碼，設置後記住（123456）
2. 驗證數據庫安裝
db1# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 42
Server version: 5.5.38-0ubuntu0.12.04.1 (Ubuntu)
Copyright (c) 2000, 2014, 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.
(db1)mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)
(db1)mysql>
3. 創建測試數據庫
CREATE DATABASE /*!32312 IF NOT EXISTS*/`test` /*!40100 DEFAULT CHARACTER SET latin1 */;
USE `test`;
/*Table structure for table `user` */
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`name` varchar(16) DEFAULT NULL,
`age` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
此步驟略
4. my.cnf配置修改
以下紅色部分為修改的配置
The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address = 127.0.0.1
bind-address =0.0.0.0
#
# * Fine Tuning
#
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover = BACKUP
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
# other settings you may need to change.
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
server_id = 1
log_bin = /var/log/mysql/mysql-bin.log
log_bin_index = /var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
expire_logs_days = 10
max_binlog_size = 100M
log_slave_updates = 1
auto_increment_increment = 2
auto_increment_offset = 1
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/
5. 創建三種角色的用戶
表格 1
角色
功能
權限
monitor user
MMM（Multi-Master replication manager of MYSQL）監控各主控的健康狀況
REPLICATION CLIENT
agent user
MMM代理用來設置只讀屬性，復制主控等
SUPER, REPLICATION CLIENT, PROCESS
replicate user
用來復制
REPLICATION SLAVE
表格 2
(db1)mysql> GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'115.29.198.150' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
(db1)mysql> GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'42.96.%.%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
(db1)mysql> GRANT REPLICATION SLAVE ON *.* TO 'replication'@'42.96.%.%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
首先假設DB1包含正確的數據（即使是空數據庫），進行DB1和DB2直接的數據同步。
1. 以下在DB1所在服務器上執行數據導出
(db1)mysql> FLUSH TABLES WITH READ LOCK;
(db1)mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 616 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
(db1)mysql>
2. 另開一個命令窗口導出數據
(db1)# mysqldump -u root -p --all-databases > /tmp/database-backup.sql
3. 解鎖第一個窗口
(db1)mysql> UNLOCK TABLES;
Query OK, 0 rows affected (0.00 sec)
(db1)mysql>
4. 將DB1導出的數據導入DB2
1) 拷貝到DB2
(db1)# scp database-backup.sql [email protected]:/tmp/
The authenticity of host '192.168.0.11 (192.168.0.11)' can't be established.
ECDSA key fingerprint is 55:84:03:9e:d9:74:cc:cd:03:59:23:3f:df:d9:77:a5.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.0.11' (ECDSA) to the list of known hosts.
[email protected]'s password:
database-backup.sql 100% 528KB 527.9KB/s 00:00
(db1):/tmp#
2) 導入DB2
(db2)# mysql -u root -p < /tmp/database-backup.sql
Enter password:
(db2)#
3) 應用權限
(db2)mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
4) 拷貝debian.cnf
將/etc/mysql/debian.cnf 從 DB1拷貝到DB2, 這個文件是用來啟動和關閉mysql用的。
(db1)# scp debian.cnf [email protected]:/tmp/
在DB2上備份原來的debian.cnf，然後使用從DB1拷貝過來的debian.cnf
(db2)# mv /etc/mysql/debian.cnf /etc/mysql/debian.cnf.orign
(db2)# cp -f debian.cnf /etc/mysql/debian.cnf
上述步驟完成後准備工作都做好了，可以開始配置復制。
1. 在DB2上執行：
(db2)mysql> CHANGE MASTER TO master_host='192.168.0.10', master_port=3306, master_user='replication', master_password='123456', master_log_file='mysql-bin.000002', master_log_pos=616;
Query OK, 0 rows affected (0.04 sec)
注：master_log_file='mysql-bin.000002', master_log_pos=616 信息來自於在DB1上執行
mysql> show master status;
2. 在DB2上啟動SLAVE
(db2)mysql> START SLAVE;
Query OK, 0 rows affected (0.00 sec)
3. DB2上檢查復制進程
(db2)mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.10
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 616
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
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: 616
Relay_Log_Space: 409
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 (0.00 sec)
4. 配置從DB2復制到DB1
1) DB2狀態
(db2)mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 107 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.01 sec)
mysql>
2) DB1復制的配置、啟動和檢查
(db1)mysql> CHANGE MASTER TO master_host = '192.168.0.11', master_port=3306, master_user='replication',
-> master_password='123456', master_log_file='mysql-bin.000002', master_log_pos=107;
Query OK, 0 rows affected (0.05 sec)
mysql> START SLAVE;
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.11
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 107
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
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: 107
Relay_Log_Space: 409
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: 2
1 row in set (0.00 sec)
mysql>
上述步驟完成MASTER-MASTER的復制配置，下面進行測試。
1. 在DB1上插入一條數據
(db1)mysql> select * from user;
Empty set (0.00 sec)
(db1)mysql> insert into user(name,age) values('user1',20);
Query OK, 1 row affected (0.03 sec)
(db1)mysql>
2. 在DB2上檢查
(db2)mysql> select * from user;
Empty set (0.00 sec)
(db2)mysql> select * from user;
+-------+------+
| name | age |
+-------+------+
| user1 | 20 |
+-------+------+
1 row in set (0.00 sec)
(db2)mysql>
表面在DB1插入的（user1,20）這條記錄已經被復制到DB2中。
3. 在DB2上插入一條數據
(db2)mysql> insert into user(name,age) values('user2',30);
Query OK, 1 row affected (0.02 sec
4. 在DB1上進行檢查
(db1)mysql> select * from user;
+-------+------+
| name | age |
+-------+------+
| user1 | 20 |
| user2 | 30 |
+-------+------+
2 rows in set (0.00 sec)
表面在DB2插入的（user2,30）這條記錄已經被復制到DB1中。
上述測試表面，DB1<----->DB2的MM配置完全成功。
