環境
Ubuntu 14.04.4 LTS *3 分別是master1(192.168.42.28), master2(192.168.42.29), slave1(192.168.42.33)測試下只有master1有從
配置
vim /etc/mysql/my.cnf
#必要的配置
[mysqld]
...
bind-address = 0.0.0.0
#3臺主機的id分別是 1,2,3
server-id = 1
binlog-do-db=test #需要記錄二進制日誌的數據庫.如果有多個數據庫可用逗號分隔,或者使用多個binlog-do-db選項
#需要同步的數據庫
replicate-do-db=test #需要進行同步的數據庫.如果有多個數據庫可用逗號分隔,或者使用多個binlog-do-db選項
log_bin = /var/log/mysql/mysql-bin.log
#這很主要，不然沒辦法做主從
log-slave-updates
...同步數據
我使用的是 innobackupex 同步，也可以mysqldump。
master1 master2 slave1都需要同步
master1 配置
#給master2權限
grant replication slave,file on *.* to 'slave'@'192.168.42.29' identified by '123123';
#給slave1權限
grant replication slave,file on *.* to 'slave'@'192.168.42.33' identified by '123123';
stop slave;
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000007 | 723 | test | |
+------------------+----------+--------------+------------------+
change master to master_host='192.168.42.29',master_user='slave',master_password='123123',master_log_file='mysql-bin.000008', master_log_pos=267,master_connect_retry=10; #mysql-bin.000008和267是master2的狀態
#參數
#master_connect_retry默認60秒，重連的時間，如果斷開就60秒從試,直到鏈接上
#master_log_pos，master_log_file爲複製主機的show master status的值
#啓動複製
start slave;
#查看狀態
show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.42.29
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 267
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes #顯示YES配置成功
Slave_SQL_Running: Yes
Replicate_Do_DB: test
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: 267
Relay_Log_Space: 410
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)master2 配置
#給master2權限
grant replication slave,file on *.* to 'slave'@'192.168.42.28' identified by '123123';
stop slave;
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000008 | 267 | test | |
+------------------+----------+--------------+------------------+
change master to master_host='192.168.42.28',master_user='slave',master_password='123123',master_log_file='mysql-bin.000007', master_log_pos=723;
#啓動複製
start slave;
#查看狀態
show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.42.28
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 723
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000007
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test
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: 723
Relay_Log_Space: 410
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: 1slave1 配置
stop slave;
change master to master_host='192.168.42.28',master_user='slave',master_password='123123',master_log_file='mysql-bin.000007', master_log_pos=723;
show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.42.28
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 883
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000007
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: 883
Relay_Log_Space: 410
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測試
分別在master1,master2 插入數據，在查看3個主機的數據
未解決的問題
當前狀態最多能有2臺是主
