MySQL多實例實現半同步復制

MySQL多實例實現半同步復制

主庫1：192.168.40.150

主庫2：192.168.40.161

從庫（2個MySQL實例）：192.168.40.162

一：分別在192.168.40.161和192.168.40.150使用【show master status;】記錄當前的復制位置

如下所示

mysql> show master status;

+--------------+----------+--------------+------------------+-------------------+

| File?????????| Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+--------------+----------+--------------+------------------+-------------------+

| mysql.000006 | 11426362 |??????????????|??????????????????|???????????????????|

+--------------+----------+--------------+------------------+-------------------+

1 row in set (0.00 sec)

二：master（分別在192.168.40.161和192.168.40.150進行如下操作）

1.啟用二進制日志

log_bin=mysql

log-bin-index=mysql-index

2.為master選擇一個在當前復制架構中惟一的server-id

server-id={0-2^32}

3.創建一個具有復制權限的用戶帳號

mysql> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'repluser'@'192.168.40.162' IDENTIFIED BY 'replpass';

mysql> FLUSH PRIVILEGES;

4.分別master的配置文件中的mysqld段添加如下一行，并重啟服務

rpl_semi_sync_master_enabled=ON?（或者：mysql> INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so';）

mysql> SHOW GLOBAL VARIABLES LIKE '%semi%';

mysql> SET GLOBAL rpl_semi_sync_master_enabled=ON;

mysql> SET GLOBAL rpl_semi_sync_master_timeout=1000;

5.配置主從復制時的事務安全:

在主服務器上mysqld段配置：sync_binlog=1

6.重啟mysql服務

二、slave（在192.168.40.162的兩個mysql實例中進行如下操作）

1.在192.168.40.162配置兩個實例:socket端口分別為3306和3307，具體配置請參考配置文件。

2.創建所需要的目錄

mkdir -p /data/{mysql3306,mysql3307}

3.分別對192.168.40.161和192.168.40.150的數據目錄打包，然后分別上傳至192.168.40.162的/data/mysql3306和/data/mysql3307目錄下

例如：

# cd /data/mysql/

# tar zcf mysql_162.tar.gz ./*

# scp mysql_162.tar.gz 192.168.40.162:/data/mysql3306/

4.啟用中繼日志（并關閉二進制日志）

relay-log=/data/mysql3306/relay-3306.log

relay-log-index=/data/mysql3306/relay-log-index-3306.log

5.為slave選擇一個在當前復制架構中惟一的server-id

server-id={0-2^32}

6.為slave選擇一個在當前復制架構中惟一的server-uuid

修數據目錄下的auto.cnf?修數據目錄下的auto.cnf?的server-uuid

如將

server-uuid=3fd1f0a1-b34e-11e4-996a-000c29b1b59d

修改為

server-uuid=3fd1f0a1-b34e-11e4-996a-000c29b1b52d

5、復制過濾器

slave:

replicate-ignore-db=mysql

replicate-ignore-db=information_schema

replicate-ignore-db=performance_schema

8.重啟mysql服務

9.開啟半同步復制

從服務器：

mysql> INSTALL PLUGIN rpl_semi_sync_slave SONAME 'semisync_slave.so';

mysql> SET GLOBAL rpl_semi_sync_slave_enabled=ON;

在主服務器驗正半同步復制是否生效：

mysql> SHOW GLOBAL STATUS LIKE '%semi%';

9.連接至主服務器

mysql> CHANGE MASTER TO MASTER_HOST='192.168.40.161', MASTER_USER='repluser',??MASTER_PASSWORD='replpass',??MASTER_PORT=3306,??MASTER_LOG_FILE='mysql.000006', MASTER_LOG_POS=11426362;

mysql> START SLAVE;??????

10.檢查主從是否成功

mysql> show slave status;

主服務器配置文件： [root@db_peizi1?~]#?more?/etc/my.cnf [client] port=3306 socket?=?/usr/local/mysql/mysql.sock[mysql] default-character-set=utf8[mysqld] port????????????=?3306 socket??????????=?/usr/local/mysql/mysql.sock basedir=/usr/local/mysql datadir=/data/mysql server_id=1 user=mysql skip-name-resolve log_bin=mysql expire_logs_days?=?30sync_binlog=1 rpl_semi_sync_master_enabled=ON#slow_log slow-query-log=On slow_query_log_file=/data/logs/mysql/peizi-slow.log long_query_time=1#?Disabling?symbolic-links?is?recommended?to?prevent?assorted?security?risks symbolic-links=0character-set-server=utf8 default-storage-engine=InnoDB explicit_defaults_for_timestamp=trueskip-external-lockingmax_connections=300 query_cache_size=1048576 performance_schema_max_table_instances=600 table_definition_cache=400 table_open_cache=256 tmp_table_size=64M max_heap_table_size=64M thread_cache_size=16myisam_max_sort_file_size=16G myisam_sort_buffer_size=32M key_buffer_size=25M read_buffer_size=128K read_rnd_buffer_size=256K sort_buffer_size=256K join_buffer_size=16M max_allowed_packet=4Minnodb_file_per_table=1 innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=2M innodb_buffer_pool_size=64M innodb_log_file_size=16M innodb_thread_concurrency=8sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"[mysqld_safe] log-error=/data/logs/mysql/mysqld.log pid-file=/usr/local/mysql/tmp/mysqld.pid多實例從服務器配置文件： [mysqld_multi] mysqld?=?/usr/local/mysql/bin/mysqld_safe mysqladmin?=?/usr/local/mysql/bin/mysqladmin[mysql] default-character-set=utf8[mysqld1] port????????????=?3306 socket??????????=?/usr/local/mysql/mysql-3306.sock basedir=/usr/local/mysql datadir=/data/mysql3306 pid-file=/var/lock/subsys/mysql3306/mysq-3306.pid server_id=11 user=mysql skip-name-resolve expire_logs_days?=?30master-info-file=/data/mysql3306/master-3306.info read-only relay-log=/data/mysql3306/relay-3306.log relay-log-index=/data/mysql3306/relay-log-index-3306.log replicate-ignore-db=mysql replicate-ignore-db=information_schema replicate-ignore-db=performance_schema#?Disabling?symbolic-links?is?recommended?to?prevent?assorted?security?risks symbolic-links=0character-set-server=utf8 default-storage-engine=InnoDB explicit_defaults_for_timestamp=trueskip-external-lockingmax_connections=300 query_cache_size=1048576 performance_schema_max_table_instances=600 table_definition_cache=400 table_open_cache=256 tmp_table_size=64M thread_cache_size=16myisam_max_sort_file_size=16G myisam_sort_buffer_size=32M key_buffer_size=25M read_buffer_size=128K read_rnd_buffer_size=256K sort_buffer_size=256K join_buffer_size=16M max_allowed_packet=4Minnodb_file_per_table=1 innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=2M innodb_buffer_pool_size=64M innodb_log_file_size=8M innodb_thread_concurrency=8lower_case_table_names=1 sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"[mysqld2] port????????????=?3307 socket??????????=?/usr/local/mysql/mysql-3307.sock basedir=/usr/local/mysql datadir=/data/mysql3307 pid-file=/var/lock/subsys/mysql3307/mysql-3307.pid server_id=6 user=mysql skip-name-resolve expire_logs_days?=?30master-info-file=/data/mysql3307/master-3307.info read-only relay-log=/data/mysql3307/relay-3307.log relay-log-index=/data/mysql3307/relay-log-index-3307.log replicate-ignore-db=mysql replicate-ignore-db=information_schema replicate-ignore-db=performance_schema#?Disabling?symbolic-links?is?recommended?to?prevent?assorted?security?risks symbolic-links=0character-set-server=utf8 default-storage-engine=InnoDB explicit_defaults_for_timestamp=trueskip-external-lockingmax_connections=300 query_cache_size=1048576 performance_schema_max_table_instances=600 table_definition_cache=400 table_open_cache=256 tmp_table_size=64M thread_cache_size=16myisam_max_sort_file_size=16G myisam_sort_buffer_size=32M key_buffer_size=25M read_buffer_size=128K read_rnd_buffer_size=256K sort_buffer_size=256K join_buffer_size=16M max_allowed_packet=4Minnodb_file_per_table=1 innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=2M innodb_buffer_pool_size=64M innodb_log_file_size=8M innodb_thread_concurrency=8lower_case_table_names=1 sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

轉載于:https://blog.51cto.com/openlinuxfly/1643835

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