1. before update
- 备份 [[202108161706 mysql备份方法]]
- 步骤：全局锁-> dump -> stop -> rename -> install -> initial -> start -> source
- 验证：随机抽取表
2. shutdown server
# 注意是哪个用户启动的服务 ;; 都是 root
root / mysql# 添加全局锁 ;; 释放锁 unlock tables
/data01/mysql/bin/mysql -e "flush tables with read lock" -p'El#2lbQL[(@'
echo "lock all tables ... OK"# 导出全库的数据
/data01/mysql/bin/mysqldump -h"127.0.0.1" -p"El#2lbQL[(@" --all-databases > /data01/data/bak/dump-20210823.sql
echo "dump all db .. OK"# 停服
/data01/mysql/support-files/mysql.server stop
echo "server has stopped ... OK"# rename
mv /data01/mysql /data01/mysql_20210824
echo "mysql has renamed ... OK"# 备份my.cnf
cp /etc/my.cnf /data01/data/bak/my.cnf_20210824
echo "my.cnf has bakked ... OK "3. upgrade
scp -P22 mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz 192.168.169.100:$PWD# 将新版本包解压
tar -zxvf /data01/app/src/mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz -C /data01/
echo "解压完成 ，，"
mv /data01/mysql-5.7.34-linux-glibc2.12-x86_64 /data01/mysql
echo "rename OK"
#
mkdir /data01/mysql/datachown -R mysql:mysql /data01/mysql
chmod -R 755 /data01/mysql
echo "dir ok"# 初始化
/data01/mysql/bin/mysqld --initialize --user=mysql --datadir=/data01/mysql/data/ --basedir=/data01/mysql/
echo "init ok"# 启动服务
/data01/mysql/support-files/mysql.server start
echo "start ok"echo " now alter root passwd , then source "
echo '/data01/mysql/bin/mysql -e "alter user root@localhost identified by B3" -p'
echo '/data01/mysql/bin/mysql -e "source /data01/data/bak/dump-20210820.sql" -p"B3"'
# 导入
#/data01/mysql/bin/mysql -e "source /data01/data/bak/dump-20210824.sql" -p"B3"4. 主从同步
# 创建用户同步的用户，从数据库登录使用；并授权
CREATE USER 'copy1'@'192.168.169.2' IDENTIFIED BY 'B3';
GRANT REPLICATION SLAVE ON *.* TO 'copy1'@'192.168.169.2' IDENTIFIED BY 'B3';
flush privileges;# 查看master状态，记住二进制文件名和位置；show master status;# slave
source dumpfile ;
# 执行同步SQL CHANGE MASTER TO MASTER_HOST='192.168.169.2',MASTER_USER='copy1',MASTER_PASSWORD='B3',MASTER_LOG_FILE='mysql-bin.000044',MASTER_LOG_POS= 282946176 start slave;show slave status\G;# 当Slave_IO_Running和Slave_SQL_Running都为YES的时候就表示主从同步设置成功了。 # 测试5. 遇到的问题
5.1 被外网攻击
被bitcoin攻击，cloudera关停，将从库数据导出，导入主库；从库数据缺失
# 1. mysql权限控制,IP白名单# 2. 从库监控，保证主从一致5.2 主从不一致
Error 'Can't find any matching row in the user table' on query. Default database: 'mysql'. Query: 'GRANT ALL PRIVILEGES ON `dtest`.* TO 'jx'@'6.1.1.1' IDENTIFIED WITH 'mysql_native_password' AS '*718454DF82E2C055BEAC164E133A7C877E253989' WITH GRANT OPTION'# 忽略错误, 1 表示跳过1个sql
show slave status\G
stop slave ;
set global sql_slave_skip_counter =1 ;
start slave ;
show slave status\G
