直接上异常信息，今天给客户部署系统，滋滋 又是奇葩的问题：
[root@localhost yum.repos.d]# yum -y install mysql-community-server
已加载插件：fastestmirror, langpacks
mysql-connectors-community | 2.5 kB 00:00:00
mysql-tools-community | 2.5 kB 00:00:00
mysql57-community | 2.5 kB 00:00:00
mysql-tools-community/x86_64/p FAILED
http://repo.mysql.com/yum/mysql-tools-community/el/7/x86_64/repodata/fd38dce5051dc3cb2a83cb5aaa1bfd26d52ec3ec-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"
正在尝试其它镜像。
mysql-connectors-community/x86 FAILED
http://repo.mysql.com/yum/mysql-connectors-community/el/7/x86_64/repodata/6a62c84b2bae1b6900e2196b989f988b05ffb477-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"
正在尝试其它镜像。
mysql57-community/x86_64/prima FAILED
http://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/repodata/8ee4ae26be7774b74df023efd37595f3d36628d7-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"A
正在尝试其它镜像。
Loading mirror speeds from cached hostfile
mysql-tools-community/x86_64/p FAILED
http://repo.mysql.com/yum/mysql-tools-community/el/7/x86_64/repodata/fd38dce5051dc3cb2a83cb5aaa1bfd26d52ec3ec-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"
正在尝试其它镜像。
mysql-connectors-community/x86 FAILED
http://repo.mysql.com/yum/mysql-connectors-community/el/7/x86_64/repodata/6a62c84b2bae1b6900e2196b989f988b05ffb477-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"
正在尝试其它镜像。
mysql57-community/x86_64/prima FAILED
http://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/repodata/8ee4ae26be7774b74df023efd37595f3d36628d7-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"A
正在尝试其它镜像。
http://repo.mysql.com/yum/mysql-connectors-community/el/7/x86_64/repodata/6a62c84b2bae1b6900e2196b989f988b05ffb477-primary.sqlite.bz2: [Errno 14] curl#56 - "Recv failure: Connection reset by peer"
正在尝试其它镜像。yum 命令死活就是运行不了，安装MySQL或者其他命令，统统用不了，如上面的命令：
原因：客户那边的系统最底层把http当成不安全的请求，唉 我的天哪：把里面的http换成https 即可
[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=https://repo.mysql.com/yum/mysql-connectors-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql-tools-community]
name=MySQL Tools Community
baseurl=https://repo.mysql.com/yum/mysql-tools-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
修改后成功运行：
===============================================================================================================================================================================================
Package 架构 版本 源 大小
===============================================================================================================================================================================================
正在安装:
mysql-community-server x86_64 5.7.28-1.el7 mysql57-community 199 M
为依赖而安装:
mysql-community-client x86_64 5.7.28-1.el7 mysql57-community 43 M
mysql-community-common x86_64 5.7.28-1.el7 mysql57-community 311 k
mysql-community-libs x86_64 5.7.28-1.el7 mysql57-community 4.2 M
事务概要
===============================================================================================================================================================================================
安装 1 软件包 (+3 依赖软件包)
总下载量：247 M
安装大小：1.0 G
Downloading packages:
警告：/var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-common-5.7.28-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY ] 558 kB/s | 5.0 MB 00:07:22 ETA
mysql-community-common-5.7.28-1.el7.x86_64.rpm 的公钥尚未安装
(1/4): mysql-community-common-5.7.28-1.el7.x86_64.rpm 