系统迁移中库体迁移是一件让人挺“头秃”的事儿。简单的需求(照原样再复制一份到XXX环境)可不意味着它的过程简单……好在openEuler社区这边提供了工具x2openEuler,能够提前评估将MySQL移植到openEuler操作系统的兼容性,再实时数据搬迁,减少很多准备工作和时间。想着可能也有朋友遇到同样的需求,这里我想分享下经验,也希望大家能够一起交流交流
本文主要用于在openEuler 20.03 sp1 操作系统上部署MySQL数据库。本次实践主要使用x86_64架构虚拟机,通过评估工具x2openEuler评估MySQL 5.7.21软件移植到openEuler操作系统的兼容性,再实施数据搬迁。如果您使用其他版本的MySQL,可以参考参考。
项目 | 说明 |
---|---|
服务器 | TaiShan 200服务器 |
CPU | 华为鲲鹏920处理器 |
Raid卡 | SAS3508 |
网络卡 | Mellanox SP333 |
– | TM210 |
– | TM280 |
磁盘容量 | 500GB以上 |
OS
软件 | 版本 | 备注 |
---|---|---|
OS | Centos 7.6.1810 | 当前mysql集群服务器 |
OS | openEuler 20.03 SP1 | 迁移目标服务器 |
软件包
软件 | 版本 |
---|---|
mysql5 | 5.7.21 |
mysql5-common | 5.7.21 |
mysql5-embedded | 5.7.21 |
mysql5-embedded-devel | 5.7.21 |
mysql5-errmsg | 5.7.21 |
mysql5-libs | 5.7.21 |
mysql5-server | 5.7.21 |
mysql5-test | 5.7.21 |
openEuler社区提供了 x2openEuler 工具 ,针对已经编译好的二进制程序,进行主要完成软件包、接口级评估,明确应用软件是否需要移植适配,是否有依赖的软件包待引入;同时评估软件调用的接口原型在两个系统中是否有差异。
注:已经编译好的二进制程序,难以保障全部兼容新OS,严重时会引发才内存风险,往往这种问题很难通过验证的方式识别出来,迁移前针对软件兼容性评估尤为重要。
wget –P /opt https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.21-1.el7.x86_64.rpm-bundle.tar
cd /opt/
mkdir mysql
tar -xf mysql-5.7.21-1.el7.x86_64.rpm-bundle.tar -C mysql
下载指引:https://www.openeuler.org/zh/other/migration/
cd /opt/mysql
rpm -ivh x2openEuler-2.0.0-1.x86_64.rpm
注意:安装rpm时需要使用root用户,且目前需要网络(用于下载安装依赖) 注意:根据提示安装依赖包如bzip2-devel等
su x2openEuler
x2openEuler redis-db -init
依次录入redis数据库的ip:127.0.0.1 端口:6379 数据库索引号(0-16):0 密码(工具会对密码加密处理):如果redis密码没有设置或者为空时,直接回车即可.
x2openEuler init source_centos7.6-openEuler20.03-LTS-SP1.tar.gz
备注:x2openEuler使用rpm安装完成后会在/opt/x2openEuler目录下带有source_centos7.6-openEuler20.03-LTS-SP1.tar.gz这个默认资源包,需要支持centos8.2到openEuler20.03-LTS-SP1的评估,则需获取对应的静态资源包导入,如对应的资源包为source_centos8.2-openEuler20.03-LTS-SP1.tar.gz,导入此包命令:x2openEuler init source_centos8.2-openEuler20.03-LTS-SP1.tar.gz,请示情况选择对应的资源包
x2openEuler scan /opt/mysql/
注意要分析的移植文件需要有能够让x2openEuler用户可以读取的权限
扫描完成后会在/opt/x2openEuler/output目录生成html格式的报告
软件兼容性评估报告分三块内容展示软件兼容性,分别是依赖包兼容性、C/C++接口兼容性、java接口兼容性,依赖包兼容性反映了软件包安装过程中的直接依赖,非100%表明无法正确安装;接口兼容性反映的是单个软件运行过程中对其他软件包、动态库或系统接口的调用变化,非100%表明在某个功能调用时可能会触发异常,未调用到时可能表现正常;部分结果建议人工复核,最终软件包使用建优先级建议 openEuler已移植包>openEuler上人工重编译包>centos软件包。
打开html报告,逐行分析,得出结论:在openEuler上直接使用centos的mysql包存在风险,风险如下:
1个待确认接口表明mysql系列软件包会调用到libaio.so.1.0.1,其函数参数数量从4变为5,直接影响了功能,在某个功能调用时可能会触发异常;
另外,报告显示需要确认3个依赖软件包,经过人工确认属于mysql系列包自闭环的依赖,故软件包安装无影响。
建议:由于函数调用风险,建议直接使用在openEuler官方编译移植过的mysql-5.7.21系列软件包
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mariadb-common-10.3.9-9.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-common-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-server-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-errmsg-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mecab-0.996-2.oe1.x86_64.rpm
rpm -ivh mysql5-5.7.21-3.oe1.x86_64.rpm mariadb-common-10.3.9-9.oe1.x86_64.rpm mysql5-common-5.7.21-3.oe1.x86_64.rpm mysql5-server-5.7.21-3.oe1.x86_64.rpm mecab-0.996-2.oe1.x86_64.rpm mysql5-errmsg-5.7.21-3.oe1.x86_64.rpm
systemctl start mysqld
systemctl status mysqld
状态为running则启动成功:
root@vm-2p32g.2288hv5-2s44p-384g--b5-0 ~# systemctl status mysqld
● mysqld.service - MySQL 5.7 database server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
Active: active (running) since Thu 2021-09-09 10:23:25 CST; 1 day 4h ago
Process: 103715 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
Process: 103738 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, sta>
Process: 103773 ExecStart=/usr/libexec/mysqld --daemonize --basedir=/usr --pid-file=/run/mysqld>
Process: 103803 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)
Main PID: 103775 (mysqld)
Tasks: 37
Memory: 188.4M
CGroup: /system.slice/mysqld.service
└─103775 /usr/libexec/mysqld --daemonize --basedir=/usr --pid-file=/run/mysqld/mysqld.
mysql -uroot -p
root@vm-2p32g.2288hv5-2s44p-384g--b5-0 /# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.21 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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>
alter user ‘user’@‘localhost’ identified by ‘passward’;
mysql> alter user 'root'@'localhost' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql>
flush privileges必须执行,否则设置不生效。
退出后重新登录,查看密码是否修改成功。
root@vm-2p32g.2288hv5-2s44p-384g--b5-0 /# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3Server version: 5.7.21 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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>
根据评估结果再去实施搬迁,整体还是比较好操作,如若评估结果有疑问,可以向openEuler社区邮件列表([email protected])咨询。
openEuler官网 https://www.openeuler.org/zh/other/migration/
x2openEuler 用户指南
https://docs.openeuler.org/zh/docs/20.03_LTS_SP1/docs/thirdparty_migration/x2openEuleruseguide.html
openEuler社区邮件列表 https://www.openeuler.org/zh/community/mailing-list/