Mysql一主多从如何部署

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下载tar.gz包

选择redhat版本

安装

1.linux系统上创建mysql1用户

useradd mysql1

2.将tar.gz包上传到服务器上并且解压

tar -zxvf mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz

3.将mysql-5.7.31-el7-x86_64目录下的文件mv到 /home/mysql1下

4.mkdir -p /home/mysql1/data 文件存储mysql1数据目录

mkdir -p /home/mysql1/data

5.将/etc/my.cfg文件复制到mysql家目录下

cp /etc/my.cnf /home/mysql1/

6.对/home/mysql1下赋权

chmod -R 755 /home/mysq1lchown mysql:mysql -R /home/mysql1/datachmod 777 /home/mysql1/data

7.修改mysql配置文件

vi /home/mysql1/my.cnf

[mysqld]user                            = port                            = 3307basedir                         = /home/mysql1datadir                         = /home/mysql1/datasocket                          = /home/mysql1/mysql.sockpid_file                        = /home/mysql1/mysql.pidlog_error                       = /home/mysql1/data/error.log#binlog日志文件log_bin                         = /home/mysql1/data/mysql-binrelay_log                       = /home/mysql1/data/relay-binslow_query_log_file             = /home/mysql1/data/slow.log#binlog过期清理时间expire_logs_days                = 15log-slave-updates               = 1log_bin_trust_function_creators = 1lower_case_table_names          = 1max_connections                 = 3000max_connect_errors              = 1000000 # 每个实例的id都设置成不一样的，比如a主机，3307 b主机设置成23307，c主机设置成33307，后面1主2从会用到server-id                       = 3307                              autocommit                      = 1# pool_size根据实际情况进行更新innodb_buffer_pool_size         = 40Ginnodb_buffer_pool_instances    = 8innodb_write_io_threads         = 16innodb_read_io_threads          = 16#mysql复制主要有三种方式：基于SQL语句的复制(statement-based replication, SBR)，基于行的复制(row-based replication, RBR)，混合模式复制(mixed-based replication, MBR)。对应的，binlog的格式也有三种：STATEMENT，ROW，MIXEDbinlog_format                   = ROWgtid_mode                       = onenforce_gtid_consistency        = 1innodb_flush_log_at_trx_commit  = 1  #add 2                          innodb_thread_concurrency       = 20innodb_print_all_deadlocks      = 1innodb_flush_method             = O_DIRECTinnodb_io_capacity              = 8000innodb_io_capacity_max          = 15000enforce_gtid_consistency        = 1binlog_rows_query_log_events    = 1character_set_server            = utf8mb4default-storage-engine          = INNODBtransaction_isolation           = READ-COMMITTEDmax_allowed_packet              = 67108864event_scheduler                 = 1slow_query_log                  = onexplicit_defaults_for_timestamp = 1   master_info_repository          = TABLErelay_log_info_repository       = TABLErelay_log_recovery              = 1relay_log_purge                 = 0  slave_rows_search_algorithms    = 'INDEX_SCAN,HASH_SCAN'slave_parallel_type             = LOGICAL_CLOCKslave_parallel_workers          = 16slave_preserve_commit_order     = 1slave_transaction_retries       = 64sync_relay_log                  = 0sync_relay_log_info             = 0sync_master_info                = 0sync_binlog                     = 1collation_server                = utf8mb4_binskip_name_resolve               = 1 plugin-load                     = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"rpl-semi-sync-master-enabled    = 1rpl-semi-sync-slave-enabled     = 1

8.数据文件初始化

1.初始化

./mysqld --defaults-file=/home/mysql1/my.cnf --initialize --basedir=/home/mysql1 --datadir=/home/mysql1/data --user=mysql1

2.启动

./mysqld_safe --defaults-file=/home/mysql1/my.cnf --user=mysql1 &

查看mysql进程已经起来，并且监听3307接口

3.本机登陆，root的初始密码可以在errorlog中找到

cat error.log | grep "temporary password"

4.本机登录指定sock文件以及指定端口及输入临时密码

./mysql -uroot -P3307 -S /home/mysql1/mysql.sock -p

5. 登录后修改root密码

set password=password('XXXXXXXX'); 修改密码flush privileges;

6. 赋予权限

grant all privileges on *.* to 'root'@'%' identified by 'XXXXXXX' with grant option;flush privileges;

7. 停止服务

./mysqladmin shutdown -uroot -p******** -S /home/mysql1/mysql.sock

使用mysql客户端datagrip连接mysql成功

通过如上相同操作安装从库，只修改配置文件相关信息，并且初始化，并且客户端连接

在master数据库上执行

1.创建repl用户并且赋予同步权限

CREATE USER 'repl' IDENTIFIED BY 'slavepass';GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' identified by 'slavepass';flush privileges;

2.查看master状态

SHOW MASTER STATUS\G;

在slave上面执行

1.配置slave从节点的master节点以及binlog偏移位置等

CHANGE MASTER TO MASTER_HOST='master地址',MASTER_USER='repl',MASTER_PASSWORD='slavepass',MASTER_LOG_FILE='mysql-bin.000003', #为master的log_fileMASTER_LOG_POS=1597,       #master的POSMASTER_PORT=3307;

2.启动slave同步进程以及查看slave状态

start slave;  #启动slave同步进程show slave status\G;

测试

在mysql1中创建testdb，使用datagrip在mysql2中即可查看从mysql1中同步的新增的库以及数据，不过datagrip需要刷新下客户端。

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