centos yum不能安装软件

[root@centos-rpi3 ~]# ping www.qq.com
PING www.qq.com (61.135.157.156) 56(84) bytes of data.
64 bytes from 61.135.157.156 (61.135.157.156): icmp_seq=1 ttl=53 time=7.37 ms
64 bytes from 61.135.157.156 (61.135.157.156): icmp_seq=2 ttl=53 time=7.43 ms
64 bytes from 61.135.157.156 (61.135.157.156): icmp_seq=3 ttl=53 time=9.30 ms
^C
--- www.qq.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 7.370/8.037/9.307/0.903 ms
[root@centos-rpi3 ~]# yum -y install vim
Loaded plugins: fastestmirror
base                                                                                                                                                                    | 3.6 kB  00:00:00     
http://mirror.centos.org/altarch ... epodata/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 create a bug on https://bugs.centos.org/



One of the configured repositories failed (CentOS Kernels for armhfp),
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-kernel ...

     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-kernel
        or
            subscription-manager repos --disable=centos-kernel

     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-kernel.skip_if_unavailable=true

failure: repodata/repomd.xml from centos-kernel: [Errno 256] No more mirrors to try.
http://mirror.centos.org/altarch/7/kernel/armhfp/kernel-$kvariant/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

换一个yum源

换国内的yum源吧,百度一下，什么都知道