Centos8为 repo ‘AppStream‘ 下载元数据失败【解决办法】

Centos8装mysql的时候出现以下错误：

搜到的解决方法是：

sudo yum install compat-openssl10

结果又报了新的错

解决这个新的错的方法如下：

修改 /etc/yum.repos.d/CentOS-Linux-Base.repo，CentOS-Linux-AppStream.repo，CentOS-Linux-Extras.repo

修改如下：

注释mirrorlist，把baseurl取消注释并修改为阿里云镜像地址，注意是：$releasever-stream

# CentOS-Linux-Base.repo
[BaseOS]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

# CentOS-Linux-AppStream.repo
[AppStream]
name=CentOS-$releasever - AppStream
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

# CentOS-Linux-Extras.repo
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/extras/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

修改之后清缓存，制作元数据缓存

# 清除所有缓存文件
yum clean all

# 制作元数据缓存
yum makecache

再次尝试安装，成功！

结果运行sudo rpm -ivh mysql-community-libs-compat-5.7.28-1.el7.x86_64.rpm还是出错

解决方法如下：

sudo yum install compat-openssl10

好家伙 又出了另一个错

解决依赖问题的办法：

//openssl
//libcrypto.so.10
sudo yum -y install openssl 

//libaio 
//ibcrypto.so.10 
sudo yum -y install libaio

//ncurses-compat-libs
//libncurses.so.5
sudo dnf install ncurses-compat-libs

//numactl
//libnuma.so.1
sudo yum install -y numactl

//perl
sudo yum install -y perl

再继续安装mysql就没问题了