mysql主主架构搭建,删库恢复
- 搭建mysql主主架构
- 环境信息
- 安装msql服务
- mysql1
- mysql2
- 设置mysql2同步mysql1
- 设置mysql1同步mysql2
- 授权测试用账户
- 安装配置keepalived
- mysql1
- 检查脚本
- mysql2
- 检查脚本
- 备份策略
- mysqldump全量备份
- mysqldump增量备份
- 数据库目录全量备份
- 删除mysql1数据库目录,恢复数据
- 删除mysql1的数据库目录
- 停止mysql1的数据库
- 全备份mysql2的数据
- 备份数据上传mysql1
- mysql1启动数据库服务
- 导入备份数据
- 恢复授权信息
- 设置mysql1同步mysql2
- 设置mysql2同步mysql1的数据
- 启动mysql1上的keepalived
- 测试用库表
搭建mysql主主架构
环境信息
主机名 | IP地址 | 服务 | 角色 |
---|---|---|---|
mysql1 | 192.168.44.188 | mysql,keepalived | mysql-master,keepalived-master |
mysql2 | 192.168.44.190 | mysql,keepalived | mysql-master,keepalived-backup |
192.168.44.100(vip) |
安装msql服务
mysql1
[root@mysql1 ~]# tar xf mysql-5.7.39-1.el7.x86_64.rpm-bundle.tar
[root@mysql1 ~]# yum -y install *.rpm[root@mysql1 ~]# vim /etc/my.cnf
[mysqld]
server_id=0001
log_bin=mysql-0001[root@mysql1 ~]# systemctl enable mysqld --now
#查看初始密码
[root@mysql1 ~]# grep password /var/log/mysqld.log | tail -1
#使用初始密码登录
[root@mysql1 ~]# mysql -uroot -p'AFKMqF?Kd2ul'mysql> alter user root@localhost identified by 'zzz-123-ZZZ';
Query OK, 0 rows affected (0.00 sec)mysql> grant replication slave on *.* to repluser@"%" identified by "zzz-123-ZZZ";
Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> show master status;
+-------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| mysql-0001.000002 | 685 | | | |
+-------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql2
[root@mysql2 ~]# tar xf mysql-5.7.39-1.el7.x86_64.rpm-bundle.tar
[root@mysql2 ~]# yum -y install *.rpm[root@mysql2 ~]# vim /etc/my.cnf
[mysqld]
server_id=0002
log_bin=mysql-0002[root@mysql2 ~]# systemctl enable mysqld --now
#查看初始密码
[root@mysql2 ~]# grep password /var/log/mysqld.log | tail -1
#使用初始密码登录
[root@mysql2 ~]# mysql -uroot -p'(se1aYk;r3:g'mysql> alter user root@localhost identified by 'zzz-123-ZZZ';
Query OK, 0 rows affected (0.00 sec)mysql> alter user root@localhost identified by 'zzz-123-ZZZ';
Query OK, 0 rows affected (0.00 sec)mysql> grant replication slave on *.* to repluser@"%" identified by "zzz-123-ZZZ";
Query OK, 0 rows affected, 1 warning (0.00 sec)
设置mysql2同步mysql1
#配置mysql2为mysql1的从服务器,填写mysql1查询master status,中的file和 Position
mysql> change master to master_host="192.168.44.188",master_user="repluser",master_password="zzz-123-ZZZ",master_log_file="mysql-0001.000002",master_log_pos=685;
Query OK, 0 rows affected, 2 warnings (0.18 sec)#配置后查看master信息
mysql> show master status;
+-------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| mysql-0002.000002 | 929 | | | |
+-------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)#查看同步信息
mysql> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 192.168.44.188Master_User: repluserMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-0001.000002Read_Master_Log_Pos: 685Relay_Log_File: mysql2-relay-bin.000002Relay_Log_Pos: 321Relay_Master_Log_File: mysql-0001.000002Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB:Replicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno: 0Last_Error:Skip_Counter: 0Exec_Master_Log_Pos: 685Relay_Log_Space: 529Until_Condition: NoneUntil_Log_File:Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error:Last_SQL_Errno: 0Last_SQL_Error:Replicate_Ignore_Server_Ids:Master_Server_Id: 1Master_UUID: 196aed76-23c3-11ee-970c-000c29919b39Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind:Last_IO_Error_Timestamp:Last_SQL_Error_Timestamp:Master_SSL_Crl:Master_SSL_Crlpath:Retrieved_Gtid_Set:Executed_Gtid_Set:Auto_Position: 0Replicate_Rewrite_DB:Channel_Name:Master_TLS_Version:
1 row in set (0.00 sec)mysql> exit
设置mysql1同步mysql2
#配置mysql1为mysql2的从服务器,填写mysql1查询master status,中的file和 Position
mysql> change master to master_host="192.168.44.190",master_user="repluser",master_password="zzz-123-ZZZ",master_log_file="mysql-0001.000002",master_log_pos=929;
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)#查看同步信息
mysql> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 192.168.44.190Master_User: repluserMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-0002.000002Read_Master_Log_Pos: 929Relay_Log_File: mysql1-relay-bin.000002Relay_Log_Pos: 321Relay_Master_Log_File: mysql-0002.000002Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB:Replicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno: 0Last_Error:Skip_Counter: 0Exec_Master_Log_Pos: 929Relay_Log_Space: 529Until_Condition: NoneUntil_Log_File:Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error:Last_SQL_Errno: 0Last_SQL_Error:Replicate_Ignore_Server_Ids:Master_Server_Id: 2Master_UUID: 2f686140-23c3-11ee-98f2-000c29fe7242Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind:Last_IO_Error_Timestamp:Last_SQL_Error_Timestamp:Master_SSL_Crl:Master_SSL_Crlpath:Retrieved_Gtid_Set:Executed_Gtid_Set:Auto_Position: 0Replicate_Rewrite_DB:Channel_Name:Master_TLS_Version:
1 row in set (0.00 sec)
授权测试用账户
#对测试mysql运行状态的用户授权
mysql> GRANT ALL PRIVILEGES ON *.* TO 'test_user'@'%' IDENTIFIED BY 'zzz-123-ZZZ' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.03 sec)mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
安装配置keepalived
mysql1
[root@mysql1 ~]# yum -y install keepalived.x86_64
[root@mysql1 ~]# vim /etc/keepalived/keepalived.conf
/etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id mysql1 #集群唯一标识vrrp_iptables #防火墙放行vrrp_skip_check_adv_addrvrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0
}
vrrp_script check_mysql {script "/usr/local/bin/check_mysql.sh" # 检测MySQL服务的脚本路径interval 3 # 检测频率(单位:秒)
# weight -4 # 检测失败时扣除的权重 通过脚本停止了keepalived服务,此处不再配置
# fall 2 # 连续检测失败次数
# rise 2 # 连续检测成功次数
}vrrp_instance VI_1 {state MASTER #节点为masterinterface ens33 #网卡名virtual_router_id 51priority 100 #节点权重,越大越重advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.44.100/24 #虚拟ip}track_script {check_mysql # 监测MySQL服务脚本的名称}
}
检查脚本
[root@mysql1 ~]# vim /usr/local/bin/check_mysql.sh
/usr/local/bin/check_mysql.sh
#!/bin/bash# 定义MySQL相关配置
MYSQL_USER="test_user"
MYSQL_PASS="zzz-123-ZZZ"
MYSQL_HOST="192.168.44.188"
MYSQL_PORT="3306"
MYSQL_VIP="192.168.44.100"# 检测MySQL状态
check_mysql_status() {# 尝试连接MySQL并执行查询if ! mysql -h "${MYSQL_HOST}" -P "${MYSQL_PORT}" -u "${MYSQL_USER}" -p"${MYSQL_PASS}" -e "SELECT 1" >/dev/null; thenecho "无法连接到MySQL!"return 1fi# MySQL状态正常return 0
}if check_mysql_status; thenecho "MySQL服务正常"exit 0
elseecho "MySQL服务异常"# 停止Keepalived服务systemctl stop keepalived.service# 释放VIP(虚拟IP)ip address del "${MYSQL_VIP}"/24 dev ens33exit 1
fi
[root@mysql1 ~]# chmod a+x /usr/local/bin/check_mysql.sh
[root@mysql1 ~]# systemctl enable keepalived.service --now
[root@mysql1 ~]# systemctl status keepalived.service
mysql2
[root@mysql2 ~]# yum -y install keepalived.x86_64
[root@mysql2 ~]# vim /etc/keepalived/keepalived.conf
/etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id mysql2 #集群唯一标识vrrp_iptables #防火墙放行vrrp_skip_check_adv_addrvrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0
}
vrrp_script check_mysql {script "/usr/local/bin/check_mysql.sh" # 检测MySQL服务的脚本路径interval 3 # 检测频率(单位:秒)
# weight -4 # 检测失败时扣除的权重 通过脚本停止了keepalived服务,此处不再配置
# fall 2 # 连续检测失败次数
# rise 2 # 连续检测成功次数
}vrrp_instance VI_1 {state BACKUP #节点为BACKUPinterface ens33 #网卡名virtual_router_id 51priority 98 #节点权重,比master要小advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.44.100/24 #虚拟ip}track_script {check_mysql # 监测MySQL服务脚本的名称}
}
检查脚本
[root@mysql2 ~]# vim /usr/local/bin/check_mysql.sh
/usr/local/bin/check_mysql.sh
#!/bin/bash# 定义MySQL相关配置
MYSQL_USER="test_user"
MYSQL_PASS="zzz-123-ZZZ"
MYSQL_HOST="192.168.44.190"
MYSQL_PORT="3306"
MYSQL_VIP="192.168.44.100"# 检测MySQL状态
check_mysql_status() {# 尝试连接MySQL并执行查询if ! mysql -h "${MYSQL_HOST}" -P "${MYSQL_PORT}" -u "${MYSQL_USER}" -p"${MYSQL_PASS}" -e "SELECT 1" >/dev/null; thenecho "无法连接到MySQL!"return 1fi# MySQL状态正常return 0
}if check_mysql_status; thenecho "MySQL服务正常"exit 0
elseecho "MySQL服务异常"# 停止Keepalived服务systemctl stop keepalived.service# 释放VIP(虚拟IP)ip address del "${MYSQL_VIP}"/24 dev ens33exit 1
fi
[root@mysql1 ~]# chmod a+x /usr/local/bin/check_mysql.sh
[root@mysql1 ~]# systemctl enable keepalived.service --now
[root@mysql1 ~]# systemctl status keepalived.service
备份策略
mysqldump全量备份
#!/bin/bash#全量备份TIME=$(date +%Y-%m-%d)
BACKUP_DIR="/mysqldump_back/"mysqldump -u 用户名 -p --master-data=2 --all-databases --result-file=${BACKUP_DIR}back-${TIME}.sql
mysqldump增量备份
#此脚本尚未亲测
#!/bin/bash#先手动全量备份,后执行脚本
mysqldump -u 用户名 -p --master-data=2 --all-databases --result-file=${BACKUP_DIR}last_backup.sqlTIME=$(date +%Y-%m-%d)
BACKUP_DIR="/路径/"
LAST_BACKUP="${BACKUP_DIR}last_backup.sql"mysqldump -u 用户名 -p --master-data=2 --databases --result-file=${BACKUP_DIR}back-${TIME}.sql --incremental=snar
rsync ${BACKUP_DIR}back-${TIME}.sql ${LAST_BACKUP}
数据库目录全量备份
#/bin/bash
rsync -av /var/lib/mysql /mysqlback/var-lib-mysql
删除mysql1数据库目录,恢复数据
删除mysql1的数据库目录
[root@mysql1 ~]# rm -rf /var/lib/mysql
查看keepalived停止,VIP漂移到mysql2
停止mysql1的数据库
[root@mysql1 ~]# systemctl stop mysqld
全备份mysql2的数据
[root@mysql2 ~]# mysqldump -uroot -pzzz-123-ZZZ --all-databases --master-data=2 > /root/20230716allback.sql
[root@mysql2 zzz]# grep mysql-0002 /root/20230716allback.sql
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-0002.000002', MASTER_LOG_POS=1493;
备份数据上传mysql1
[root@mysql2 ~]# scp /root/20230716allback.sql 192.168.44.188:/root
mysql1启动数据库服务
[root@mysql1 ~]# systemctl start mysqld
#生成初始密码,初始密码登录,改密码#数据库没有生成初始密码
[root@mysql1 ~]# grep "password" /var/log/mysqld.log | tail -1
2023-07-16T07:28:38.032091Z 882 [Note] Access denied for user 'test_user'@'localhost' (using password: YES)
#停止mysql服务,删除数据库目录,再次启动数据库
[root@mysql1 ~]# systemctl stop mysqld.service
[root@mysql1 ~]# rm -rf /var/lib/mysql
[root@mysql1 ~]# systemctl start mysqld
[root@mysql1 ~]# grep "password" /var/log/mysqld.log | tail -1
2023-07-16T07:30:43.170590Z 15 [Note] Access denied for user 'test_user'@'localhost' (using password: YES)
#依旧没有生成初始密码#重置root密码
vim /etc/mysql
#增加免密配置
skip-grant-tables#重启数据库
systemctl restart mysqld#免密登录
mysql#修改root密码
mysql> update mysql.user set authentication_string=password("123qqq...A")
where user="root" and host="localhost";
#确保修改生效
mysql> flush privileges;
mysql> exit; 断开连接#注释免密登录
vim /etc/mysql
#增加免密配置
#skip-grant-tables#重启数据库
systemctl restart mysqld#使用密码登录
[root@mysql1 ~]# mysql -uroot -p123qqq...A#重置密码
mysql> alter user root@localhost identified by 'zzz-123-ZZZ';
Query OK, 0 rows affected (0.00 sec)mysql> exit
#修改好密码后
#登录查看为空库
[root@mysql1 ~]# mysql -uroot -pzzz-123-ZZZ
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 337
Server version: 5.7.39-log MySQL Community Server (GPL)Copyright (c) 2000, 2022, Oracle and/or its affiliates.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.mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
mysql> exit
导入备份数据
[root@mysql1 ~]# mysql -uroot -pzzz-123-ZZZ < /root/20230716allback.sql
#查看数据
[root@mysql1 ~]# mysql -uroot -pzzz-123-ZZZ
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 631
Server version: 5.7.39-log MySQL Community Server (GPL)Copyright (c) 2000, 2022, Oracle and/or its affiliates.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.mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test1 |
+--------------------+
5 rows in set (0.00 sec)mysql> use test1;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -ADatabase changed
mysql> show tables;
+-----------------+
| Tables_in_test1 |
+-----------------+
| table1 |
| table2 |
+-----------------+
2 rows in set (0.00 sec)#查看授权信息
mysql> show grants for repluser;
ERROR 1141 (42000): There is no such grant defined for user 'repluser' on host '%'
查看mysql2授权信息
[root@mysql2 zzz]# mysql -uroot -pzzz-123-ZZZ -e "show grants for repluser"
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------------------------------------+
| Grants for repluser@% |
+--------------------------------------------------+
| GRANT REPLICATION SLAVE ON *.* TO 'repluser'@'%' |
+--------------------------------------------------+
恢复授权信息
#即授权信息未被恢复#恢复授权信息
#上传mysql2数据库目录的mysql目录到mysql1
[root@mysql1 ~]# scp -r 192.168.44.190:/var/lib/mysql/mysql /var/lib/mysql/
#查看 上传来的mysql目录的属性信息
[root@mysql1 ~]# ll var/lib/mysql/mysql
[root@mysql1 ~]# chown -R mysql:mysql /var/lib/mysql#mysql1的数据库服务重新加载配置
[root@mysql1 ~]# ps -ef | grep mysql
mysql 93344 1 0 15:38 ? 00:00:01 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
root 116253 1275 0 15:52 pts/0 00:00:00 grep --color=auto mysql
[root@mysql1 ~]#
[root@mysql1 ~]#
#kill -1 或 kill -SIGHUP
[root@mysql1 ~]# kill -1 93344#再次查看授权信息,此时MySQL1的root密码也和mysql2同步
[root@mysql1 ~]# mysql -uroot -pzzz-123-ZZZ -e "show grants for repluser"
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------------------------------------+
| Grants for repluser@% |
+--------------------------------------------------+
| GRANT REPLICATION SLAVE ON *.* TO 'repluser'@'%' |
+--------------------------------------------------+
设置mysql1同步mysql2
设置mysql1同步mysql2的数据,使用备份数据里的binlog数据
[root@mysql2 zzz]# grep mysql-0002 /root/20230716allback.sql
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-0002.000002', MASTER_LOG_POS=1493;
[root@mysql1 ~]# mysql -uroot -pzzz-123-ZZZ
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 2388
Server version: 5.7.39-log MySQL Community Server (GPL)Copyright (c) 2000, 2022, Oracle and/or its affiliates.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.mysql> change master to master_host="192.168.44.190",master_user="repluser",master_password="zzz-123-ZZZ",master_log_file="mysql-0002.000002",master_log_pos=1493;
Query OK, 0 rows affected, 2 warnings (0.00 sec)mysql>
mysql>
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)mysql> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 192.168.44.187Master_User: repluserMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-0002.000003Read_Master_Log_Pos: 154Relay_Log_File: mysql1-relay-bin.000003Relay_Log_Pos: 369Relay_Master_Log_File: mysql-0002.000003Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB:Replicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno: 0Last_Error:Skip_Counter: 0Exec_Master_Log_Pos: 154Relay_Log_Space: 744Until_Condition: NoneUntil_Log_File:Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error:Last_SQL_Errno: 0Last_SQL_Error:Replicate_Ignore_Server_Ids:Master_Server_Id: 2Master_UUID: 88729250-22fc-11ee-af60-000c29fe7242Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind:Last_IO_Error_Timestamp:Last_SQL_Error_Timestamp:Master_SSL_Crl:Master_SSL_Crlpath:Retrieved_Gtid_Set:Executed_Gtid_Set:Auto_Position: 0Replicate_Rewrite_DB:Channel_Name:Master_TLS_Version:
1 row in set (0.00 sec)
设置mysql2同步mysql1的数据
#查看mysql1的master信息
mysql> show master status;
+-------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| mysql-0001.000004 | 549254 | | | |
+-------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
#配置mysql2同步mysql1的数据
mysql> stop slave;
Query OK, 0 rows affected (0.00 sec)mysql>
mysql> RESET SLAVE ALL;
Query OK, 0 rows affected (0.00 sec)mysql> change master to master_host="192.168.44.186",master_user="repluser",master_password="zzz-123-ZZZ",master_log_file="mysql-0001.000004",master_log_pos=549254;
Query OK, 0 rows affected, 2 warnings (0.01 sec)mysql> start slave;
Query OK, 0 rows affected (0.00 sec)mysql>
mysql>
mysql> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 192.168.44.186Master_User: repluserMaster_Port: 3306Connect_Retry: 60Master_Log_File: mysql-0001.000004Read_Master_Log_Pos: 707915Relay_Log_File: mysql2-relay-bin.000002Relay_Log_Pos: 158982Relay_Master_Log_File: mysql-0001.000004Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB:Replicate_Ignore_DB:Replicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno: 0Last_Error:Skip_Counter: 0Exec_Master_Log_Pos: 707915Relay_Log_Space: 159190Until_Condition: NoneUntil_Log_File:Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error:Last_SQL_Errno: 0Last_SQL_Error:Replicate_Ignore_Server_Ids:Master_Server_Id: 1Master_UUID: 0f1f81d7-23b1-11ee-b1e8-000c29919b39Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind:Last_IO_Error_Timestamp:Last_SQL_Error_Timestamp:Master_SSL_Crl:Master_SSL_Crlpath:Retrieved_Gtid_Set:Executed_Gtid_Set:Auto_Position: 0Replicate_Rewrite_DB:Channel_Name:Master_TLS_Version:
1 row in set (0.00 sec)
数据恢复完成,主主同步恢复
启动mysql1上的keepalived
[root@mysql1 ~]# systemctl start keepalived.service
#此时vip会回到mysql1
测试用库表
期间创建test库,和表table1,表table2测试数据
CREATE DATABASE test CHARACTER SET utf8;CREATE TABLE table1 (id INT AUTO_INCREMENT PRIMARY KEY,home VARCHAR(255),love VARCHAR(255),age INT
);CREATE TABLE table2 (id INT ,home VARCHAR(255),love VARCHAR(255),age INT
);
创建两个脚本测试插入随机数据
#!/bin/bashvip_my="192.168.44.100"while true
do# 生成一个随机数作为 age 字段的值age=$(shuf -i 1-100 -n 1)# 生成一个随机字符串作为 home 和 love 字段的值,长度为 10home=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)love=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)# 检查是否已经存在相同的 home 和 love 值result=$(mysql -h ${vip_my} -u test_user -pzzz-123-ZZZ -e "SELECT COUNT(*) FROM test.table1 WHERE home='$home' AND love='$love';" -s)# 如果不存在相同的值,则插入新的记录if [ "$result" -eq 0 ]; thenmysql -h${vip_my} -u test_user -pzzz-123-ZZZ -e "INSERT INTO test.table1 (home, love, age) VALUES ('$home', '$love', $age);"fisleep 1 # 暂停 1 秒
done
#!/bin/bashvip_my="192.168.44.100"while true
do# 生成一个随机数作为 id 字段的值,因为table2的id未设置自增长id=$(shuf -i 1-100000 -n 1)# 生成一个随机字符串作为 home 和 love 字段的值,长度为 10home=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)love=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)# 生成一个随机数作为 age 字段的值age=$(shuf -i 1-100 -n 1)# 插入数据到 table2 表mysql -h${vip_my} -u test_user -pzzz-123-ZZZ -e "INSERT INTO test.table2 (id, home, love, age) VALUES ($id, '$home', '$love', $age);"sleep 1 # 暂停 1 秒
done