阮胜昌的技术记录站-LinuxMySQL数据库运维

摘要：准备安装包：https://github.com/actiontech/dtle/releasesrpm -ivh dtle-3.20.08.0.x86_64.rpmyum install   epel-release   jq -y  yum localinstall dtle-3.20.08.0.x86_64.rpm配置文件：默认配置文件的位置：[root@node200 dtle]# pwd/etc/dtle[root@node200 dtle]# lsconsul.hcl  nomad.hcl启动服务：systemctl start dtle-nomadsyste

摘要：拓扑环境：主机名                IP地址                 角色                                 版本node250                172.16.1.250  &n

摘要：undrop是一款针对mysql innodb的数据恢复工具，通过扫描文件或磁盘设备，然后解析innodb数据页进而恢复丢失的数据，对于drop、truncate以及文件损坏都很有帮助。本文介绍drop操作后表结构的恢复过程。部署软件包下载shell> git clone https://github.com/twindb/undrop-for-innodb.git依赖包安装#此处安装必须的编译环境shell> yum install make gcc flex bison编译shell

摘要：最近项目中某个模块稳定复现MySQL死锁问题，本文记录死锁的发生原因以及解决办法。测试环境：[root@node232 ~]# cat /etc/redhat-releaseCentOS release 6.9 (Final)[root@node232 ~]# uname -aLinux node232 2.6.32-696.el6.x86_64 #1 SMP Tue Mar 21 19:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux[root@node232 ~]# mysql -e "\s"--------------mysql  V

摘要：Configuring Group Replication in Multi-Primary Mode1.接上面单主模式的配置，将4台实例全部停止[root@node232 group_Replication]#mysqld_multi  --defaults-file=/server/shell_scripts/group_Replication/grouprep.cnf stop 1-4或者：[root@node232 group_Replication]# mysqladmin -uroot -p -h127.0.0.1 -P3311 shutdown[root@node232 group_Replication]# mysqlad

摘要：Configuring Group Replication in Single-Primary Mode1.查看停止当前的mysql服务：#service mysqld stop2.查看grouprep.cnf启动配置文件：[mysqld1]# Server configurationdatadir=/var/lib/mysql1port=3311socket=/var/lib/mysql1/mysql.sock# General Replication configurationserver-id=1user=mysqlbinlog-format=ROWbinlog-checksum=NONElog-bin=mysql1-binrelay-log=my

摘要：通过配置多实现来做来实验的平台，在一台服务器上，配置4个MySQL实例1.将现在的MySQL服务器停止[root@node232 ~]# service mysqld stopShutting down MySQL.. SUCCESS!2.查看多实例repl.cnf文件 [root@node232 replication]# cat repl.cnf[mysqld1]datadir=/var/lib/mysql1port=3311socket=/var/lib/mysql1/mysql.sockserver-id=1user=mysqllog-bin=mysql1-binrelay-log=m

摘要：1.查询employees库的titles表：root@localhost[(none)]>use employees;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedroot@localhost[employees]>select emp_no,title from titles where title='Manager' AND to_date>NOW();+--------+---------+| emp_no | ti

摘要：1.打个两个终端T1和T2T1:[root@node232 ~]# mysqlWelcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 4Server version: 5.7.18-log MySQL Community Server (GPL)Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other

摘要：查看服务器是否开启SSL:root@localhost[(none)]>show variables like 'have_ssl'    -> ;+---------------+----------+| Variable_name | Value    |+---------------+----------+| have_ssl      | DISABLED |        #表示没有开启SSL+---------------+----------+1 row in set (0.00 sec)通过mysql_ssl_rsa_s