从 CentOS 7 或 RHEL 7 中完全删除 MariaDB 或 MySQL
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Completely remove MariaDB or MySQL from CentOS 7 or RHEL 7
提问by Stack Over
I installed MariaDB on CentOS 7 but I had some problems with some configuration, now it is completely misconfigured.
我在 CentOS 7 上安装了 MariaDB，但我在某些配置上遇到了一些问题，现在它完全配置错误。
Thus, I wanted to remove the MariaDB with “yum remove mariadb mariadb-server”, after that I reinstalled it with “yum install mariadb mariadb-server”.
因此，我想用“yum remove mariadb mariadb-server”删除MariaDB，然后我用“yum install mariadb mariadb-server”重新安装它。
Unfortunately, the configuration remains. It seems as if yum remove don't delete all MariaDB Config-Files.
不幸的是，配置仍然存在。似乎 yum remove 不会删除所有 MariaDB 配置文件。
How can I remove MariaDB completely from CentOS 7?
如何从 CentOS 7 中完全删除 MariaDB？
回答by Ciprian Stoica
These steps are working on CentOS 6.5 so they should work on CentOS 7 too:
这些步骤适用于 CentOS 6.5，因此它们也适用于 CentOS 7：
(EDIT- exactly the same steps work for MariaDB 10.3 on CentOS 8)
（编辑- 在 CentOS 8 上，MariaDB 10.3 的步骤完全相同）
yum remove mariadb mariadb-serverrm -rf /var/lib/mysqlIf your datadirin /etc/my.cnfpoints to a different directory, remove that directory instead of /var/lib/mysqlrm /etc/my.cnfthe file might have already been deleted at step 1- Optional step:
rm ~/.my.cnf yum install mariadb mariadb-server
yum remove mariadb mariadb-serverrm -rf /var/lib/mysql如果您DATADIR在/etc/my.cnf中指向不同的目录，删除该目录，而不是在/ var / lib中/ MySQL的rm /etc/my.cnf该文件可能已在步骤 1 中被删除- 可选步骤：
rm ~/.my.cnf yum install mariadb mariadb-server
[EDIT] - Update for MariaDB 10.1 on CentOS 7
[编辑] - 在 CentOS 7 上更新 MariaDB 10.1
The steps above worked for CentOS 6.5 and MariaDB 10.
上述步骤适用于 CentOS 6.5 和 MariaDB 10。
I've just installed MariaDB 10.1 on CentOS 7 and some of the steps are slightly different.
我刚刚在 CentOS 7 上安装了 MariaDB 10.1，其中一些步骤略有不同。
Step 1 would become:
步骤 1 将变为：
yum remove MariaDB-server MariaDB-client
Step 5 would become:
第 5 步将变为：
yum install MariaDB-server MariaDB-client
The other steps remain the same.
其他步骤保持不变。
回答by Trevor
To update and answer the question without breaking mail servers. Later versions of CentOS 7 have MariaDB included as the base along with PostFix which relies on MariaDB. Removing using yum will also remove postfix and perl-DBD-MySQL. To get around this and keep postfix in place, first make a copy of /usr/lib64/libmysqlclient.so.18 (which is what postfix depends on) and then use:
在不破坏邮件服务器的情况下更新和回答问题。CentOS 7 的更高版本包含 MariaDB 作为基础以及依赖于 MariaDB 的 PostFix。使用 yum 删除也会删除 postfix 和 perl-DBD-MySQL。为了解决这个问题并保持 postfix 到位，首先复制 /usr/lib64/libmysqlclient.so.18（这是 postfix 所依赖的），然后使用：
rpm -qa | grep mariadb
then remove the mariadb packages using (changing to your versions):
然后使用（更改为您的版本）删除 mariadb 包：
rpm -e --nodeps "mariadb-libs-5.5.56-2.el7.x86_64"
rpm -e --nodeps "mariadb-server-5.5.56-2.el7.x86_64"
rpm -e --nodeps "mariadb-5.5.56-2.el7.x86_64"
Delete left over files and folders (which also removes any databases):
删除剩余的文件和文件夹（这也会删除任何数据库）：
rm -f?/var/log/mariadb
rm -f /var/log/mariadb/mariadb.log.rpmsave
rm -rf?/var/lib/mysql
rm -rf?/usr/lib64/mysql
rm -rf?/usr/share/mysql
Put back the copy of /usr/lib64/libmysqlclient.so.18 you made at the start and you can restart postfix.
把你在开始时做的/usr/lib64/libmysqlclient.so.18 的副本放回去，你可以重新启动postfix。
There is more detail at https://code.trev.id.au/centos-7-remove-mariadb-replace-mysql/which describes how to replace mariaDB with MySQL
https://code.trev.id.au/centos-7-remove-mariadb-replace-mysql/ 中有更多详细信息，其中描述了如何用 MySQL 替换 mariaDB
回答by CRTLBREAK
systemd
系统
sudo systemctl stop mysqld.service && sudo yum remove -y mariadb mariadb-server && sudo rm -rf /var/lib/mysql /etc/my.cnf
sysvinit
sysvinit
sudo service mysql stop && sudo apt-get remove mariadb mariadb-server && sudo rm -rf /var/lib/mysql /etc/my.cnf
