centos7一直显示yum time out centos7一直正在连接

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mob64ca14085c24 2024-03-28 13:36:44

文章标签 centos linux 服务器代理模式 xml 文章分类 架构后端开发

1、描述

最近在玩自己的虚拟机时，使用wget和yum会自动跳转到本地的80端口，并且连接被拒绝（本地没有启动80端口，肯定会被拒绝了）

其实wget是偶尔会出现连接正常并下载成功的！

[root@k8s-node1 gitlab]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
--2022-05-12 16:10:54--  http://mirrors.aliyun.com/repo/Centos-7.repo
正在连接 192.168.6.21:80... 失败：拒绝连接。

[root@k8s-node1 gitlab]# yum makecache
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                                                                   | 7.3 kB  00:00:00     
 * base: mirrors.aliyun.com
 * epel: mirrors.bfsu.edu.cn
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。


 One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
 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=base ...

     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 base
        or
            subscription-manager repos --disable=base

     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=base.skip_if_unavailable=true

failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"

[root@k8s-node1 gitlab]#  yum makecache
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                                                                   | 7.3 kB  00:00:00     
 * base: mirrors.aliyun.com
 * epel: mirrors.bfsu.edu.cn
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
正在尝试其它镜像。


 One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
 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=base ...

     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 base
        or
            subscription-manager repos --disable=base

     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=base.skip_if_unavailable=true

failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to 192.168.6.21:80; 拒绝连接"

直接看图：

centos7一直显示yum time out centos7一直正在连接_linux

centos7一直显示yum time out centos7一直正在连接_centos_02

排查网络发现，ping百度时存在丢包（直接看图吧）

centos7一直显示yum time out centos7一直正在连接_linux_03

带着疑问百度了好几遍终究还是没有找到答案，答案基本一致指向重新配置yum源，但最终肯定是失败滴

2、原因

带着疑问“走亲访友”好多，由于是自己玩的虚机，直接建议我恢复快照或者重新搭建
我当然是不能接收的啦！要迎难而上，这才…当然该认怂时还是…
最终在我坚持要搞清原由和解决问题的初心下，迎来了其中一个大佬的结论和解决办法

设置代理了吧?试试这个
export http_proxy=''
export https_proxy=''

仿佛如梦初醒，依稀记得之前好像配置过代理（没记错实在测试nginx的正向代理时操作过代理这亏）

centos7一直显示yum time out centos7一直正在连接_xml_04

果然，黄天不负有心人，要是我这次直接恢复快照，那这个问题下次遇到还是不会

大佬经常在自己虚机上搞代理“科学滴上网”，所以很熟这块

3、解决

解决的办法就在上面，清除代理即可

export http_proxy=''
export https_proxy=''

根据自己的配置进行清理就行了，或者两个都清理了吧，我这里使用了http，清理即可

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