x2openEuler升级CentOS 7.5到openEuler22.03-SP4升级前检查报错

Migration 迁移
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x2openEuler升级CentOS 7.5到openEuler22.03-SP4升级前检查报错，报错信息如下，请教各位大佬有没有什么解决方案，谢谢！

安装 x2openEuler 客户端包失败，出现错误为：failed to install x2openEuler-upgrade, result is http://mirrors.huaweicloud.com/centos/7.9.2009/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below wiki article

https://wiki.centos.org/yum-errors

If above article doesn’t help to resolve this issue please use https://bugs.centos.org/.

解决方案
请根据失败问题对应检查

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CentOS 的华为源好像挂了，可以使用另一个地址： repo.huaweicloud.com/centos-vault/

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请问在哪个配置文件中配置这个源呢？

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5

问题已经解决，谢谢！