yum源报错

admin

# yum install -y chrony.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.sjtu.edu.cn
/ k5 n) n* Y2 @  ] * extras: mirrors.huaweicloud.com
# J- b: w1 M9 A * updates: ftp.sjtu.edu.cn
base                                                                                                     | 3.6 kB  00:00:00     
centos-ceph-jewel                                                                                        | 2.9 kB  00:00:00     
centos-openstack-pike                                                                                    | 2.9 kB  00:00:00     
http://mirror.centos.org/altarch/7/virt/x86_64/kvm-common/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
$ R, J) W& P, G0 `Trying other mirror.
To address this issue please refer to the below wiki article
https://wiki.centos.org/yum-errors
6 z, `) u) l9 T, S" ?; e. xIf above article doesn't help to resolve this issue please use https://bugs.centos.org/.
2 P) Z' l4 ]; Y& u3 m; H
5 R3 f) I0 M1 E& V! n4 Z/ A One of the configured repositories failed (CentOS-7 - QEMU EV),
0 d* L2 E2 Q; n  t1 t& t6 G 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.
( l" E' b3 {6 ]6 c     2. Reconfigure the baseurl/etc. for the repository, to point to a working
+ s- M! _. Z" Z        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).
# h1 E0 n# v4 {1 a8 I5 J     3. Run the command with the repository temporarily disabled
1 X& B* b' z" f6 F0 Y4 m; t1 k5 r% E" A            yum --disablerepo=centos-qemu-ev ...
     4. Disable the repository permanently, so yum won't use it by default. Yum
. s! Q; c- J; S5 C7 T, r        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:
            yum-config-manager --disable centos-qemu-ev
        or
            subscription-manager repos --disable=centos-qemu-ev
     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
6 M5 n4 y: b" ~' T9 ~* F        slower). If it is a very temporary problem though, this is often a nice
        compromise:
            yum-config-manager --save --setopt=centos-qemu-ev.skip_if_unavailable=true
1 v, Y2 f6 ^  n& a7 Z1 I, u+ Gfailure: repodata/repomd.xml from centos-qemu-ev: [Errno 256] No more mirrors to try.
http://mirror.centos.org/altarch/7/virt/x86_64/kvm-common/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

/ R7 ]7 L8 a: C( C/ U4 G报错原因是因为yum源配置文件CentOS-QEMU-EV.repo有问题，需要验证所以会报错。
; b2 T# ?* T" q# W/ i# vim /etc/yum.repos.d/CentOS-QEMU-EV.repo
8 `6 e9 G( D* l  M4 N' q将默认状态的
gpgcheck=1
* u5 \, e( A1 A( U; O6 P- xenabled=1
* h& V) r0 F7 f4 {& B1 p修改为：
4 }7 _, r2 ]/ G3 V4 A9 O2 L
1 l: x4 t% n5 v" ngpgcheck=0
enabled=0
0 l3 E! b0 s( A5 \' N; k4 [
再次安装就不会出现问题了。
; e% c7 ^: g$ u