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redhat7安装CDH5.10.0时,在yum源遇到报错,信息如下

Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

http://IP/clouderamanager/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below knowledge base article 

https://access.redhat.com/articles/1320623

If above article doesn't help to resolve this issue please open a ticket with Red Hat Support.



 One of the configured repositories failed (centos),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=centos ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable centos
        or
            subscription-manager repos --disable=centos

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=centos.skip_if_unavailable=true

failure: repodata/repomd.xml from centos: [Errno 256] No more mirrors to try.
http://IP/clouderamanager/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

请各位给看看这是啥原因

YUM源的问题，
解决很简单啊，明确你的yum源文件是否配置正确，
如果不知道，就备份现在的，然后删除，之后重新配置就OK了。

---

你用的RHEL。。。所以，只能去红帽那边设置，还需要订阅。。。
为啥不搞 centos 呢？直接各种国内源，速度又快。。。

应该是你yum repo有问题

在安装失败的主机上，检查存储库是否正确。

尤其是baseurl

# grep 'baseurl' /etc/yum.repos.d/* | grep HDP

只需在 URL 中附加“/repodata/repomd.xml”，然后测试它是否可访问。

示例：如果 baseurl是 http://public-repo-1.hortonworks.com/HDP/centos7/2.x/updates/2.6.3.0 则尝试按以下方式访问它以验证访问权限。请检查所有网址

# curl -v http://public-repo-1.hortonworks.com/HDP/centos7/2.x/updates/2.6.3.0/repodata/repomd.xml

如果 URL 可以访问，那么在这种情况下尝试通过运行命令来清理 yum 缓存。

# yum clean all

yum clean 后尝试再次运行以下命令以验证问题是否仍然存在。

# yum -y install ranger_2_6_3_0_235-admin

也可以参照：