Mysql主从复制，单台服务器上实施

原文链接：?http://blog.csdn.net/songxixi/article/details/8737555 现在公司向在一台服务器上做主从复制，现在了解到的是需要安装多个mysql不同的服务，才可以，我现在 在现有单实例数据库下，分了不同的端口以下所示红色部分；[root@mysql ~]# netstat -t

原文链接：?http://blog.csdn.net/songxixi/article/details/8737555

现在公司向在一台服务器上做主从复制，现在了解到的是需要安装多个mysql不同的服务，才可以，我现在 在现有单实例数据库下，分了不同的端口以下所示红色部分；
[root@mysql ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:1001                0.0.0.0:*                   LISTEN      2515/rpc.statd      
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      2483/portmap        
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      2750/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      3056/sendmail: acce 
tcp        0      0 :::3306                     :::*                        LISTEN      4025/mysqld         
tcp        0      0 :::3307                     :::*                        LISTEN      17423/mysqld        
tcp        0      0 :::3308                     :::*                        LISTEN      17388/mysqld        
tcp        0      0 :::3309                     :::*                        LISTEN      20371/mysqld        
tcp        0      0 :::22                       :::*                        LISTEN      2741/sshd           
udp        0      0 0.0.0.0:995                 0.0.0.0:*                               2515/rpc.statd      
udp        0      0 0.0.0.0:998                 0.0.0.0:*                               2515/rpc.statd      
udp        0      0 0.0.0.0:42601               0.0.0.0:*                               3204/avahi-daemon:  
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               3204/avahi-daemon:  
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               2483/portmap        
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               2750/cupsd          
udp        0      0 :::5353                     :::*                                    3204/avahi-daemon:  
udp        0      0 :::59254                    :::*                                    3204/avahi-daemon:  
[root@mysql mysql]# mysqld_multi --defaults-extra-file=/etc/mysqld_multi.cnf report
Reporting MySQL servers
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql mysql]# lsof -i:3308
COMMAND   PID  USER   FD   TYPE DEVICE SIZE NODE NAME
mysqld  17388 mysql   11u  IPv6  45429       TCP *:tns-server (LISTEN)
[root@mysql mysql]# lsof -i:3307
COMMAND   PID  USER   FD   TYPE DEVICE SIZE NODE NAME
mysqld  17423 mysql   11u  IPv6  45479       TCP *psession-prxy (LISTEN)
[root@mysql mysql]# lsof -i:3309
COMMAND   PID  USER   FD   TYPE DEVICE SIZE NODE NAME
mysqld  20371 mysql   11u  IPv6  47851       TCP *:tns-adv (LISTEN)
[root@mysql mysql]# lsof -i:3306
COMMAND  PID  USER   FD   TYPE DEVICE SIZE NODE NAME
mysqld  4025 mysql   11u  IPv6  16575       TCP *:mysql (LISTEN)
[root@mysql mysql]#
[root@mysql ~]# 
在以上服务都启动正常的情况下，配置主从，我没有调整IO的线程，不知道在不同端口见做主从复制关系，以下是我配置最后遇到的错误，请绿林好汉帮忙看看啊，拍砖。。。
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.1.10
                  Master_User: slave001
                  Master_Port: 3308
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 1027
               Relay_Log_File: localhost3308-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000003
             Slave_IO_Running: No
            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: 1027
              Relay_Log_Space: 107
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 1593
                Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1
1 row in set (0.00 sec)
ERROR: 
No query specified
mysql>
我在mysqld_multi.cnf里面添加了以下红色的，复制内容启动还是报错，请指点哇
[mysqld_multi]
mysqld     = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user       = multi_admin
password   = my_password
[mysqld2]
socket     = /tmp/mysql3307.sock
port       = 3307
pid-file   = /usr/local/mysql/data3307/localhost3307.pid
datadir    = /usr/local/mysql/data3307
#language   = /usr/local/mysql/share/mysql/english
user       = mysql
[mysqld3]
#mysqld     = /path/to/mysqld_safe
#ledir      = /path/to/mysqld-binary/
#mysqladmin = /path/to/mysqladmin
socket     = /tmp/mysql3308.sock
port       = 3308
pid-file   = /usr/local/mysql/data3308/localhost3308.pid
datadir    = /usr/local/mysql/data3308
#language   = /usr/local/mysql/share/mysql/swedish
user       = mysql
master-host = 192.168.1.10
master-user = slave001
master-password = slave001
master-port = 3306
replicate-do-db=test
错误：
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.1.10
                  Master_User: slave001
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000018
          Read_Master_Log_Pos: 107
               Relay_Log_File: localhost3308-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000018
             Slave_IO_Running: No
            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: 107
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 1593
                Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1
1 row in set (0.00 sec)

哎，经过几个小时的琢磨，终于看到庐山真面目了！以下是成功启动的效果；
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]#
其实，在我配置muti的时候有些参数没有做好设置，到时server-id服务启动不起来，我把所有的muti的mysqld【1-4】全部放到我们的配置文件内/etc/my.cnf，包括我们的3306端口的实例库，在启动的时候一起跑即可！以下是我my.cnf的配置文件信心，请查阅；
# The following options will be passed to all MySQL clients
[mysqld_multi]
mysqld     = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user       = root
# Here follows entries for some specific programs
# The MySQL server
[mysqld1]
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
user=mysql
old_passwords=1
port=3306
skip-name-resolve
server_id=1
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_size=10
read_rnd_buffer_size=134228
table_cache=10000
tmp_table_size=5362
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
#log=/usr/local/mysql/data/mysql1.log
pid-file=/usr/local/mysql/data/mysql1.pid
log-error=/usr/local/mysql/data/log.1
log-slave-updates
slave-skip-errors=ALL
[mysqld2]
datadir=/usr/local/mysql/data3307
socket=/tmp/mysql3307.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=222
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=5368912
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3307
pid-file=/usr/local/mysql/data3307/localhost3307.pid
log-error=/usr/local/mysql/data3307/log.2
[mysqld3]
datadir=/usr/local/mysql/data3308
socket=/tmp/mysql3308.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=223
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=5368912
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3308
pid-file=/usr/local/mysql/data3308/localhost3308.pid
log-error=/usr/local/mysql/data3308/log.3
[mysqld4]
datadir=/usr/local/mysql/data3309
socket=/tmp/mysql3309.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=224
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=5368912
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3309
pid-file=/usr/local/mysql/data3309/localhost3309.pid
log-error=/usr/local/mysql/data3309/log.4
以上就是配置的启动服务内容，我把server-id分到每个mysqld内部，并保持唯一即可，实现我们要做的单台服务器做主从复制的基本配置要求；配置主从的步骤很简单我就不在这里说了，有不了解如何做主从的可以随时留言即可，以下为我配置成功后主从的启动参数的效果；
mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.10
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000032
          Read_Master_Log_Pos: 893
               Relay_Log_File: localhost3307-relay-bin.000003
                Relay_Log_Pos: 253
        Relay_Master_Log_File: mysql-bin.000032
             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: 893
              Relay_Log_Space: 1194
              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)
ERROR: 
No query specified
mysql>

原文地址：Mysql主从复制，单台服务器上实施, 感谢原作者分享。