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所属分类：MySQL
前言
有兴趣的朋友可以看看Binlog Server的作用架构的Blog：http://blog.booking.com/mysql_slave_scaling_and_more.html
个人认为 Maxscale 作为Binlog Server的想法是非常好的，但是还是不够灵活：
- 需要Master的所有Binlog文件从 mysql-bin.000001 到最后都有。
- 还不支持GTID。
- 如果是双master，Maxscale会认为两个都是slave，需要用手动去切换。
配置
这边就演示一下配置和使用，我们将Maxscale的Binlog文件放在/u01/maxscale/logs/binlog/目录下
- /etc/maxscale.cnf 主要配置
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[Replication] type=service router=binlogrouter version_string=5.6.31-77.0-log user=maxscale passwd=8ADDE5625C666B83FB6774159C51423D router_options=server_id=5308001233,user=maxscale,password=123456,master_id=5308001233,heartbeat=30,binlogdir=/u01/maxscale/logs/binlog/,transaction_safety=1,master_version=5.6.31-77.0-log,master_hostname=192.168.1.233,mariadb10-compatibility=1 [Replication Listener] type=listener service=Replication protocol=MySQLClient port=5308 |
注意：上面router_options配置的都是Maxscale作为Binlog Server的配置，不是指定哪个Master的配置
- master.ini 文件
该文件主要记录了Maxscale的Binlog是从哪个Master传输过来的
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[root@normal_11 tmp]# cat /u01/maxscale/logs/binlog/master.ini [binlog_configuration] master_host=192.168.137.21 master_port=3306 master_user=maxscale master_password=123456 filestem=mysql-bin |
- 完整的配置文件
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[root@normal_11 tmp]# cat /etc/maxscale.cnf ################################################### # CREATE USER maxscale@'%' IDENTIFIED BY "123456"; # GRANT replication slave, replication client ON *.* TO maxscale@'%'; # GRANT SELECT ON mysql.* TO maxscale@'%'; # GRANT ALL ON maxscale_schema.* TO maxscale@'%'; # GRANT SHOW DATABASES ON *.* TO maxscale@'%'; # groupadd maxscale # useradd -g maxscale maxscale # cd /opt # tar -zxf maxscale-2.0.1.rhel.7.tar.gz # ln -s /opt/maxscale-2.0.1.rhel.7 /usr/local/maxscale # chown -R maxscale:maxscale /usr/local/maxscale # mkdir -p /u01/maxscale/{data,cache,logs,tmp} # mkdir -p /u01/maxscale/logs/{binlog,trace} # chown -R maxscale:maxscale /u01/maxscale # /usr/local/maxscale/bin/maxkeys /u01/maxscale/data/ # /usr/local/maxscale/bin/maxpasswd /u01/maxscale/data/.secrets 123456 ################################################### [maxscale] # 开启线程个数，默认为1.设置为auto会同cpu核数相同 threads=auto # timestamp精度 ms_timestamp=1 # 将日志写入到syslog中 syslog=1 # 将日志写入到maxscale的日志文件中 maxlog=1 # 不将日志写入到共享缓存中，开启debug模式时可打开加快速度 log_to_shm=0 # 记录告警信息 log_warning=1 # 记录notice log_notice=1 # 记录info log_info=1 # 不打开debug模式 log_debug=0 # 日志递增 log_augmentation=1 # 相关目录设置 basedir=/usr/local/maxscale/ logdir=/u01/maxscale/logs/trace/ datadir=/u01/maxscale/data/ cachedir=/u01/maxscale/cache/ piddir=/u01/maxscale/tmp/ [server1] type=server address=192.168.137.21 port=3306 protocol=MySQLBackend serv_weight=1 [server2] type=server address=192.168.137.22 port=3306 protocol=MySQLBackend serv_weight=3 [server3] type=server address=192.168.137.23 port=3306 protocol=MySQLBackend serv_weight=3 [MySQL Monitor] type=monitor module=mysqlmon servers=server1,server2,server3 user=maxscale passwd=1D30C1E689410756D7B82C233FCBF8D9 # 监控心态为 10s monitor_interval=10000 # 当复制slave全部断掉时，maxscale仍然可用，将所有的访问指向master节点 detect_stale_master=true # 监控主从复制延迟，可用后续指定router service的(配置此参数请求会永远落在 master) # detect_replication_lag=true [Read-Only Service] type=service router=readconnroute servers=server1,server2,server3 user=maxscale passwd=1D30C1E689410756D7B82C233FCBF8D9 router_options=slave # 允许root用户登录执行 enable_root_user=1 # 查询权重 weightby=serv_weight filters=dbfw-blacklist [Read-Write Service] type=service router=readwritesplit servers=server1,server2,server3 user=maxscale passwd=1D30C1E689410756D7B82C233FCBF8D9 max_slave_connections=100% # sql语句中的存在变量只指向master中执行 use_sql_variables_in=master # 允许root用户登录执行 enable_root_user=1 # 允许主从最大间隔(s) max_slave_replication_lag=3600 filters=Hint [Replication] type=service router=binlogrouter version_string=10.1.8-MariaDB-log user=maxscale passwd=1D30C1E689410756D7B82C233FCBF8D9 router_options=server_id=5308137011,user=maxscale,password=123456,master_id=5308137011,heartbeat=30,binlogdir=/u01/maxscale/logs/binlog/,transaction_safety=1,master_version=10.1.8-MariaDB-log,master_hostname=192.168.137.11,mariadb10-compatibility=1 [MaxAdmin Service] type=service router=cli [Read-Only Listener] type=listener service=Read-Only Service protocol=MySQLClient port=4008 [Read-Write Listener] type=listener service=Read-Write Service protocol=MySQLClient port=4006 [MaxAdmin Listener] type=listener service=MaxAdmin Service protocol=maxscaled socket=/u01/maxscale/tmp/maxadmin.sock port=6603 [Replication Listener] type=listener service=Replication protocol=MySQLClient port=5308 |
- 启动Maxscale查看日志以
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2016-11-05 15:46:35.223 info : (createInstance): Replication: /u01/maxscale/logs/binlog//master.ini parse result is 0 2016-11-05 15:46:35.229 info : (get_users): Replication: User maxscale@% for database maxscale_schema added to service user table. 2016-11-05 15:46:35.229 info : (get_users): Replication: User maxscale@% for database mysql added to service user table. 2016-11-05 15:46:35.229 info : (get_users): Replication: User HH@% for database ANY added to service user table. 2016-11-05 15:46:35.231 info : (createInstance): Replication: Service has transaction safety option set to ON 2016-11-05 15:46:35.231 notice : (createInstance): Validating binlog file 'mysql-bin.000003' ... 2016-11-05 15:46:35.233 notice : (blr_print_binlog_details): 1478311475 @ 249, GTID List Event, (Sat Nov 5 10:04:35 2016), First EventTime 2016-11-05 15:46:35.234 notice : (blr_print_binlog_details): 1478317696 @ 66056, Query Event, (Sat Nov 5 11:48:16 2016), Last EventTime 2016-11-05 15:46:35.235 notice : (blr_read_events_all_events): Transaction Summary for binlog 'mysql-bin.000003' Description Total Average Max No. of Transactions 86 No. of Events 258 3.0 3 No. of Bytes 15.0k 179.0B 179.0B 2016-11-05 15:46:35.236 info : (createInstance): Current binlog file is mysql-bin.000003, safe pos 66125, current pos is 66125 2016-11-05 15:46:35.236 info : (session_alloc): Started session [0] for Replication service 2016-11-05 15:46:35.237 notice : (load_module): Loaded module MySQLBackend: V2.0.0 from /usr/local/maxscale/lib/maxscale/libMySQLBackend.so 2016-11-05 15:46:35.238 notice : (blr_start_master): Replication: attempting to connect to master server 192.168.137.21:3306, binlog mysql-bin.000003, pos 66125 2016-11-05 15:46:35.238 notice : (dcb_listen): Listening connections at 0.0.0.0:5308 with protocol MySQL 2016-11-05 15:46:35.239 info : (session_alloc): Started session [0] for Replication service 2016-11-05 15:46:35.239 info : (ModuleInit): Initialise MaxScaled Protocol module. 2016-11-05 15:46:35.239 notice : (load_module): Loaded module maxscaled: V2.0.0 from /usr/local/maxscale/lib/maxscale/libmaxscaled.so 2016-11-05 15:46:35.240 notice : (dcb_listen): Listening connections at 0.0.0.0:6603 with protocol MaxScale Admin 2016-11-05 15:46:35.243 info : (session_alloc): Started session [0] for MaxAdmin Service service 2016-11-05 15:46:35.243 notice : (dcb_listen): Listening connections at /u01/maxscale/tmp/maxadmin.sock with protocol MaxScale Admin 2016-11-05 15:46:35.244 info : (session_alloc): Started session [0] for MaxAdmin Service service 2016-11-05 15:46:35.244 notice : (main): MaxScale started with 1 server threads. 2016-11-05 15:46:35.246 notice : (log_flush_cb): Started MaxScale log flusher. 2016-11-05 15:46:35.258 notice : (blr_master_response): Replication: Request binlog records from mysql-bin.000003 at position 66125 from master server 192.168.137.21:3306 2016-11-05 15:46:35.259 notice : (blr_log_identity): Replication: identity seen by the master: server_id: 1013169715, uuid: f9dbc544-a32b-11e6-ba0d-080027e7d114 2016-11-05 15:46:35.259 notice : (blr_log_identity): Replication: identity seen by the slaves: server_id: 1013169715, hostname: 192.168.137.11, MySQL version: 10.1.8-MariaDB-log |
- 查看Binlog Server作为slave的状态
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[root@normal_11 tmp]# mysql -umaxscale -p123456 -h192.168.137.11 -P5308 Logging to file '/u01/mysql_history/query.log' mysql: [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 18874 Server version: 5.5.5-10.1.8-MariaDB-log MariaDB Server Copyright (c) 2009-2015 Percona LLC and/or its affiliates 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. maxscale@192.168.137.11 03:47:50 [(none)]>show master status; +------------------+----------+--------------+------------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Execute_Gtid_Set | +------------------+----------+--------------+------------------+------------------+ | mysql-bin.000003 | 82190 | | | | +------------------+----------+--------------+------------------+------------------+ 1 row in set (0.00 sec) maxscale@192.168.137.11 03:48:03 [(none)]>show slave status \G *************************** 1. row *************************** Slave_IO_State: Binlog Dump Master_Host: 192.168.137.21 Master_User: maxscale Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000003 Read_Master_Log_Pos: 82190 Relay_Log_File: mysql-bin.000003 Relay_Log_Pos: 82190 Relay_Master_Log_File: mysql-bin.000003 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: 82190 Relay_Log_Space: 82190 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: 1013169715 Master_UUID: f9dbc544-a32b-11e6-ba0d-080027e7d114 Master_Info_File: /u01/maxscale/logs/binlog//master.ini SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave running Master_Retry_Count: 1000 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 row in set (0.00 sec) |
这边复制的Binlog位点永远是和Master一样的。
- 停止 [server3]192.168.137.23 slave 转成是 Maxscale的Slave
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root@(none) 15:51:18>show global variables like 'server_id'; +---------------+------------+ | Variable_name | Value | +---------------+------------+ | server_id | 3306137023 | +---------------+------------+ 1 row in set (0.00 sec) root@(none) 15:50:38>stop slave; Query OK, 0 rows affected, 1 warning (0.00 sec) root@(none) 15:50:45>reset slave; Query OK, 0 rows affected (0.00 sec) root@(none) 15:51:23>CHANGE MASTER TO -> MASTER_HOST='192.168.137.21', -> MASTER_USER='maxscale', -> MASTER_PASSWORD='123456', -> MASTER_PORT=5308, -> MASTER_LOG_FILE='mysql-bin.000003', -> MASTER_LOG_POS=82190; Query OK, 0 rows affected (0.01 sec) root@(none) 15:55:24>start slave; Query OK, 0 rows affected (0.00 sec) root@(none) 15:55:45>show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.137.11 Master_User: maxscale Master_Port: 5308 Connect_Retry: 60 Master_Log_File: mysql-bin.000003 Read_Master_Log_Pos: 82190 Relay_Log_File: relay-log-bin.000002 Relay_Log_Pos: 541 Relay_Master_Log_File: mysql-bin.000003 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: 82190 Relay_Log_Space: 841 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: 1013169715 Master_SSL_Crl: Master_SSL_Crlpath: Using_Gtid: No Gtid_IO_Pos: Replicate_Do_Domain_Ids: Replicate_Ignore_Domain_Ids: Parallel_Mode: conservative 1 row in set (0.00 sec) |
哈哈这样就成功的让 [server3]变成了[maxscale] 的slave节点了
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