【原创】mysql-utilities工具体验
我主要体验了下几个关于REPLICATION的工具。 其他的可以参见手册。先说下我的环境：
MASTER: 192.168.1.131
SLAVE: 192.168.1.132, 192.168.1.133
三台DB都有对外的ALL权限用户。
各个配置文件如下，
# cat /etc/my.cnf
user = ytt
skip-name-resolve
innodb_buffer_pool_size = 128M
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
server_id = 131
socket = /tmp/mysql.sock
explicit_defaults_for_timestamp
log-bin=mysql56-master-bin
binlog-ignore-db=mysql
gtid-mode=on
enforce-gtid-consistency
log-slave-updates
binlog-format=ROW
sync-master-info=1
report-host=192.168.1.131
report-port=3306
master_info_repository=table
relay_log_info_repository=table
其他两台SERVER，除了SERVER-ID，都基本相同，我就不贴了。
1. MYSQLREPLICATE 搭建主从的脚本，这里我搭建了两台从机。
mysqlreplicate --master=root:root@192.168.1.131:3306 --slave=root:root@192.168.1.132:3306;...
# ./replicate_create
# master on 192.168.1.131: ... connected.
# slave on 192.168.1.132: ... connected.
# Checking for binary logging on master...
# Setting up replication...
# ...done.
# master on 192.168.1.131: ... connected.
# slave on 192.168.1.133: ... connected.
# Checking for binary logging on master...
# Setting up replication...
# ...done.
2. mysqlrplcheck检查主从的运行情况。
# mysqlrplcheck --master=root:root@192.168.1.131:3306 --slave=root:root@192.168.1.132:3306 -s
# master on 192.168.1.131: ... connected.
# slave on 192.168.1.132: ... connected.
Test Description Status
---------------------------------------------------------------------------
Checking for binary logging on master
Are there binlog exceptions?
+---------+--------+------------+
| server| do_db| ignore_db|
+---------+--------+------------+
| master| | mysql |
| slave | | mysql |
+---------+--------+------------+
Replication user exists?
Checking server_id values
Checking server_uuid values
Is slave connected to master?
Check master information file
Checking InnoDB compatibility
Checking storage engines compatibility
Checking lower_case_table_names settings
Checking slave delay (seconds behind master)
#
# Slave status:
#
Slave_IO_State : Waiting for master to send event
Master_Host : 192.168.1.131
Master_User : rpl
Master_Port : 3306
Connect_Retry : 60
Master_Log_File : mysql56-master-bin.000002
Read_Master_Log_Pos : 151
Relay_Log_File : mysql56-slave-relay-bin.000003
Relay_Log_Pos : 379
Relay_Master_Log_File : mysql56-master-bin.000002
Slave_IO_Running : Yes
Slave_SQL_Running : Yes
Replicate_Do_DB :
Replicate_Ignore_DB : mysql
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 : 151
Relay_Log_Space : 819
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 : 131
Master_UUID : 4d89ad1d-bc12-11e2-87e9-080027338857
Master_Info_File : mysql.slave_master_info
SQL_Delay : 0
SQL_Remaining_Delay : None
Slave_SQL_Running_State : Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count : 86400
Master_Bind :
Last_IO_Error_Timestamp :
Last_SQL_Error_Timestamp :
Master_SSL_Crl :
Master_SSL_Crlpath :
Retrieved_Gtid_Set :
Executed_Gtid_Set :
Auto_Position : 1
# ...done.
3. mysqlrplshow. 显示主从的架构。
# mysqlrplshow --master=root:root@192.168.1.131:3306 --discover-slaves-login=root:root -v
# master on 192.168.1.131: ... connected.
# Finding slaves for master: 192.168.1.131:3306
# Replication Topology Graph
192.168.1.131:3306 (MASTER)
|
+--- 192.168.1.132:3306 - (SLAVE)
|
+--- 192.168.1.133:3306 - (SLAVE)
#
4. mysqlfailover. 监视主从健康状态。
# mysqlfailover --master=root:root@192.168.1.131:3306 --discover-slaves-login=root:root
# Discovering slaves for master at 192.168.1.131:3306
# Discovering slave at 192.168.1.132:3306
# Found slave: 192.168.1.132:3306
# Discovering slave at 192.168.1.133:3306
# Found slave: 192.168.1.133:3306
# Checking privileges.
MySQL Replication Failover Utility
Failover Mode = auto Next Interval = Tue May 14 12:27:56 2013
Master Information
------------------
Binary Log File PositionBinlog_Do_DBBinlog_Ignore_DB
mysql56-master-bin.0151 mysql
GTID Executed Set
None
Replication Health Status
+----------------+-------+---------+--------+------------+-------------------------------------------+
| host | port| role | state| gtid_mode| health |
+----------------+-------+---------+--------+------------+-------------------------------------------+
| 192.168.1.131| 3306| MASTER| UP | ON | OK |
| 192.168.1.132| 3306| SLAVE | UP | ON | OK |
| 192.168.1.133| 3306| SLAVE | UP | ON | Binary log and Relay log filters differ.|
+----------------+-------+---------+--------+------------+-------------------------------------------+
Q-quit R-refresh H-health G-GTID Lists U-UUIDs
#
5. mysqlrpladmin. 对主从进行管理。
停止从机服务：
# mysqlrpladmin--master=root:root@192.168.1.131:3306 --slaves=root:root@192.168.1.132:3306,root:root@192.168.1.133:3306stop
# Checking privileges.
# Performing STOP on all slaves.
# Executing stop on slave 192.168.1.132:3306 Ok
# Executing stop on slave 192.168.1.133:3306 Ok
# ...done.
# 开启从机服务：
# mysqlrpladmin--master=root:root@192.168.1.131:3306 --slaves=root:root@192.168.1.132:3306,root:root@192.168.1.133:3306stop
# Checking privileges.
# Performing STOP on all slaves.
# Executing stop on slave 192.168.1.132:3306 Ok
# Executing stop on slave 192.168.1.133:3306 Ok
# ...done.
#
选择最好的备机准备以后切换用.
# mysqlrpladmin --master=root:root@192.168.1.131:3306 --slaves=root:root@192.168.1.132:3306,root:root@192.168.1.133:3306 elect
# Checking privileges.
# Electing candidate slave from known slaves.
# Best slave found is located on 192.168.1.132:3306.
# ...done.
# 进行主从切换。
#mysqlrpladmin --master=root:root@192.168.1.131:3306 --slaves=root:root@192.168.1.132:3306,root:root@192.168.1.133:3306--new-master=root:root@192.168.1.132:3306--demote-master switchover
# Checking privileges.
# Performing switchover from master at 192.168.1.131:3306 to slave at 192.168.1.132:3306.
# Checking candidate slave prerequisites.
# Checking slaves configuration to master.
# Waiting for slaves to catch up to old master.
# Stopping slaves.
# Performing STOP on all slaves.
# Demoting old master to be a slave to the new master.
# Switching slaves to new master.
# Starting all slaves.
# Performing START on all slaves.
# Checking slaves for errors.
# Switchover complete.
#
# Replication Topology Health:
+----------------+-------+---------+--------+------------+-----------------------------+
| host | port| role | state| gtid_mode| health |
+----------------+-------+---------+--------+------------+-----------------------------+
| 192.168.1.132| 3306| MASTER| UP | ON | OK |
| 192.168.1.131| 3306| SLAVE | UP | ON | OK |
| 192.168.1.133| 3306| SLAVE | UP | ON | OK |
+----------------+-------+---------+--------+------------+-----------------------------+
# ...done.
#
显示下新的主从架构：
# mysqlrplshow --master=root:root@192.168.1.132:3306 --discover-slaves-login=root:root -v
# master on 192.168.1.132: ... connected.
# Finding slaves for master: 192.168.1.132:3306
# Replication Topology Graph
192.168.1.132:3306 (MASTER)
|
+--- 192.168.1.131:3306 - (SLAVE)
|
+--- 192.168.1.133:3306 - (SLAVE)
#
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