27. 主从复制-gtid搭建¶
1. 介绍¶
# GTID:global transaction ID,
# 对于一个已提交事务的编号，并且是一个全局唯一的编号
GTID=source_id:transaction_id
2. server_uuid与server_id区别¶
source_id:也叫uuid，默认在启动数据库时，自动生成，位于数据目录下
/application/mysql/data/auto.cnf
手工删除此文件，重启数据库后，可以重新生成
3. 重要参数¶
gtid-mode=on #启动gtid，否则就是普通复制架构
enforce-gtid-consistency=true #强制gtid的一致性
log-slave-updates=1 #slave更新是否记入日志
4. 配置文件¶
vim /etc/my.cnf
#151
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.log
log_bin=/data/mysql/mysql-bin
binlog_format=row
skip-name-resolve
server-id=51
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/tmp/mysql.sock
#161
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.log
log_bin=/data/mysql/mysql-bin
binlog_format=row
skip-name-resolve
server_id=61
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/tmp/mysql.sock
#162
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/tmp/mysql.sock
log-error=/data/mysql/mysql.log
log_bin=/data/mysql/mysql-bin
binlog_format=row
skip-name-resolve
server_id=62
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/tmp/mysql.sock
5. 基于gtid的构建¶
#1.环境
#master：192.168.178.151
#slave： 192.168.178.161，192.168.178.162
#2.主库创建复制用户
show master status;
reset master;
show master status;
grant replication slave on *.* to repl@'192.168.178.%' identified by '123';
show master status;
#3.从库开启gtid复制
show master status;
reset master;
show master status;
change master to master_host='192.168.178.151',master_user='repl',master_password='123',master_auto_position=1;
show master status;
start slave;
show master status;
#4.查看gtid状态
#主库
show master status;
#从库
show slave status\G
#主库
mysql> show master status;
+------------------+----------+--------------+------------------+----------------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+----------------------------------------+
| mysql-bin.000007 | 449 | | | 741453b1-a83a-11eb-acdf-000c29482705:1 |
+------------------+----------+--------------+------------------+----------------------------------------+
1 row in set (0.00 sec)
#得到id：741453b1-a83a-11eb-acdf-000c29482705:1
#从库
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.178.151
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 449
Relay_Log_File: 161-relay-bin.000002
Relay_Log_Pos: 662
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: 449
Relay_Log_Space: 867
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: 51
Master_UUID: 741453b1-a83a-11eb-acdf-000c29482705
Master_Info_File: /application/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 741453b1-a83a-11eb-acdf-000c29482705:1 #1.得到这两行信息
Executed_Gtid_Set: 741453b1-a83a-11eb-acdf-000c29482705:1 #2.得到这两行信息
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
#得到
#Retrieved_Gtid_Set: 741453b1-a83a-11eb-acdf-000c29482705:1
#Executed_Gtid_Set: 741453b1-a83a-11eb-acdf-000c29482705:1
6. 验证¶
1. 主库创建新库¶
#151
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.02 sec)
mysql>
mysql> create database cp;
Query OK, 1 row affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| cp |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
2. 从库1查看¶
#161
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql>
mysql>
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| cp |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql>
3. 从库2查看¶
#162
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| cp |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
开启成功！！！¶
最后更新:
2022-02-25 03:53:42