大家好,我是考100分的小小码 ,祝大家学习进步,加薪顺利呀。今天说一说CentOS7下RPM模式搭建MySQL5.7.28主从复制「建议收藏」,希望您对编程的造诣更进一步.
一、配置文件:
主库(192.168.128.111):
[client]
port=3306
socket=/approot/data/mysql/mysql.sock
default-character-set=utf8
[mysql]
port=3306
# 设置mysql客户端默认字符集
default-character-set=utf8
[mysqld]
#Mysql服务的唯一编号 每个mysql服务Id需唯一
server-id=111
# 只能用IP地址检查客户端的登录,不用主机名
# skip_name_resolve=0
# 设置3306端口
port=3306
# 设置mysql数据库的数据的存放目录
#datadir=/var/lib/mysql
#datadir=/approot/data/mysql/data
datadir=/approot/data/mysql
log-error=/var/log/mysqld.log
#socket=/var/lib/mysql/mysql.sock
socket=/approot/data/mysql/mysql.sock
pid-file=/var/run/mysqld/mysqld.pid
# 支持符号链接
symbolic-links=0
# 允许最大连接数
max_connections=500
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
lower_case_table_names=1
max_allowed_packet=16M
character-set-server=utf8
collation-server=utf8_general_ci
# SQL模式
sql_mode=STRICT_TRANS_TABLES,ANSI_QUOTES,NO_AUTO_CREATE_USER,NO_AUTO_VALUE_ON_ZERO
# 设置时间戳的默认属性
explicit_defaults_for_timestamp=true
# 是否对sql语句大小写敏感,1表示不敏感
lower_case_table_names=1
# 每个innodb表数据单独文件保存
innodb_file_per_table=ON
# 增加每个进程的可打开文件数量
open-files-limit=6000
######################### 主从复制设置 #############################
# 开启mysql binlog功能
log-bin=mysql-bin.log
# binlog记录内容的方式,记录被操作的每一行
binlog_format=MIXED
# 减少记录日志的内容,只记录受影响的列
binlog_row_image=minimal
# 指定需要复制的数据库名为testdb
binlog-do-db=testdb
# binlog过期清理时间
expire_logs_days=7
# 每个binlog日志文件大小
max_binlog_size=100M
# binlog缓存大小
binlog_cache_size=4M
# binlog最大缓存大小
max_binlog_cache_size=100M
# 不生成日志文件的数据库,多个忽略数据库可以用逗号拼接,或者 复制这句话,写多行
binlog-ignore-db=mysql
# 自增值的偏移量
auto-increment-offset=1
# 自增值的自增量
auto-increment-increment=1
# 跳过从库错误,下面的配置是忽略1062的错误
# slave-skip-errors=1062
代码100分
从库(192.168.128.112)
代码100分[client]
port=3306
socket=/approot/data/mysql/mysql.sock
default-character-set=utf8
[mysql]
port=3306
# 设置mysql客户端默认字符集
default-character-set=utf8
[mysqld]
#Mysql服务的唯一编号 每个mysql服务Id需唯一
server-id=112
# 只能用IP地址检查客户端的登录,不用主机名
# skip_name_resolve=0
# 设置3306端口
port=3306
# 设置mysql数据库的数据的存放目录
#datadir=/var/lib/mysql
#datadir=/approot/data/mysql/data
datadir=/approot/data/mysql
log-error=/var/log/mysqld.log
#socket=/var/lib/mysql/mysql.sock
socket=/approot/data/mysql/mysql.sock
pid-file=/var/run/mysqld/mysqld.pid
# 支持符号链接
symbolic-links=0
# 允许最大连接数
max_connections=500
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
lower_case_table_names=1
max_allowed_packet=16M
character-set-server=utf8
collation-server=utf8_general_ci
# SQL模式
sql_mode=STRICT_TRANS_TABLES,ANSI_QUOTES,NO_AUTO_CREATE_USER,NO_AUTO_VALUE_ON_ZERO
# 设置时间戳的默认属性
explicit_defaults_for_timestamp=true
# 是否对sql语句大小写敏感,1表示不敏感
lower_case_table_names=1
# 每个innodb表数据单独文件保存
innodb_file_per_table=ON
# 增加每个进程的可打开文件数量
open-files-limit=6000
# 限制从库只读,但是此限制对拥有SUPER权限的用户均无效。
read_only=ON
######################### 从库配置 #############################
# relay_log的位置和名称,如果值为空,则默认位置在数据文件的目录(datadir)
relay-log=relay-log
# 定义relay_log的位置和名称
relay-log-index=relay-log.index
# 是否自动清空不再需要中继日志时。默认值为1(启用)
relay_log_purge=1
# 当slave从库宕机后,假如relay-log损坏了,则自动放弃所有未执行的relay-log,并且重新从master上获取日志
relay_log_recovery=1
# 当设置为1时,slave的I/O线程每次接收到master发送过来的binlog日志都要写入系统缓冲区,然后刷入relay_log中继日志里
sync_relay_log=0
# 与sync_relay_log的配置含义相似
sync_relay_log_info=0
二、安装前准备工作,两台主机都要做
1、配置网络、防火墙、内核安全
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
#BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
IPV6INIT=no
IPV4_FAILURE_FATAL=no
NAME=ens33
UUID=a9ef0538-d1ea-4f84-8ce6-9446304c9ed4
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.128.112
GATEWAY=192.168.128.2
IPV6_PRIVACY=no
NETMASK=255.255.255.0
DNS1=114.114.114.114
DNS2=8.8.8.8
DNS3=8.8.4.4
代码100分systemctl restart network
systemctl stop firewalld.service
systemctl disable firewalld.service
systemctl status firewalld
vim /etc/selinux/config
设置:SELINUX=disabled
setenforce 0
三、安装并配置mysql,但一定不要启动,两台安装方法相同
准备安装介质:
mkdir -p /approot/software/
scp -r root@192.168.128.111:/approot/software/mysql/ /approot/software/
或者直接下载后解压也可以
tar -xf mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar -C /approot/software/mysql
预先检查卸载mariadb
rpm -qa | grep mariadb
rpm -ev --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64
预先检查卸载mysql
rpm -qa|grep -i mysql
rpm -ev --nodeps mysql-community-server-5.7.28-1.el7.x86_64
rpm -ev --nodeps mysql-community-client-5.7.28-1.el7.x86_64
rpm -ev --nodeps mysql-community-common-5.7.28-1.el7.x86_64
rpm -ev --nodeps mysql-community-libs-5.7.28-1.el7.x86_64
安装mysql
cd /approot/software/mysql
rpm -ivh mysql-community-common-5.7.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.28-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.28-1.el7.x86_64.rpm
yum install libaio
rpm -ivh mysql-community-server-5.7.28-1.el7.x86_64.rpm
四、分别配置并启动两台mysql,因为主从都修改默认的datadir,因此需要在启动前进行配置。
1、分别将主从的配置复制到各自主机的/etc/my.cnf中。
2、分别在两台主机上创建文件夹并授权
mkdir -p /approot/data/mysql
chown -R mysql:mysql /approot/data/mysql
ll -d /approot/data/mysql
另开一个监视日志的终端,方便查看动态初始化密码
tail -F /var/log/mysqld.log
如果不开,也可以启动后打开查找,或命令查找
grep "password" /var/log/mysqld.log
比如查看到结果为:
[Note] A temporary password is generated for root@localhost: bBq*oaqc0ryE
3、启动mysql服务
systemctl start mysqld
根据上面方法获取到密码登陆mysql:
[root@hadoop100 etc]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.7.28
4、修改root密码
set global validate_password_policy=LOW;
set global validate_password_length=5;
set password for root@localhost=password("leizm");
grant all privileges on *.* to "root"@"%" identified by "leizm";
flush privileges;
5、如果是主库,则在主库上创建个同步数据的账户,用来主从复制,提供给从库访问用。
create user "repl"@"192.168.128.%" identified by "leizm";
grant replication slave on *.* to "repl"@"192.168.128.%";
flush privileges;
两台mysql都启动后就剩下同步了
五、主从同步启动复制,先操作主库、再操作从库
1、主库上获取同步点
mysql> flush tables with read lock;
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 | 715 | testdb | mysql | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql> unlock tables;
2、从库根据主库同步点执行同步
stop slave;
change master to
master_host="192.168.128.111",
master_port=3306,
master_user="repl",
master_password="leizm",
master_log_file="mysql-bin.000004",
master_log_pos=715;
start slave;
show slave statusG;
上面命令执行结果:
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> change master to
-> master_host="192.168.128.111",
-> master_port=3306,
-> master_user="repl",
-> master_password="leizm",
-> master_log_file="mysql-bin.000004",
-> master_log_pos=715;
start slave;
Query OK, 0 rows affected, 2 warnings (0.02 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.128.111
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 715
Relay_Log_File: relay-log.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000004
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: 715
Relay_Log_Space: 521
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: 111
Master_UUID: af18a083-66c1-11ea-98c7-0050563d66c2
Master_Info_File: /approot/data/mysql/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:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
同步成功!
有更多的配置信息和常见问题,可参考:
https://blog.csdn.net/sky__liang/article/details/85684615
https://blog.csdn.net/daicooper/article/details/79905660
https://www.cnblogs.com/cjsblog/archive/2018/09/26/9706370.html
https://blog.csdn.net/qq_36441027/article/details/81139209
https://zixuephp.net/article-440.html
https://blog.csdn.net/juded/article/details/54600294
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