配置华为源

备份
```
cp -a /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
```
配置基础源
在没有wget命令的情况下手动写入
```
cat > /etc/yum.repos.d/CentOS-Base.repo << 'EOF'
[base]
name=CentOS-$releasever - Base - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-7

#released updates 
[updates]
name=CentOS-$releasever - Updates - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - repo.huaweicloud.com
baseurl=https://repo.huaweicloud.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://repo.huaweicloud.com/centos/RPM-GPG-KEY-CentOS-7
EOF
```
下载
```
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.huaweicloud.com/repository/conf/CentOS-7-anon.repo
```
清除缓存/刷新缓存
```
yum clean all && yum repolist
```
配置扩展源

epel.repo
```
cat > /etc/yum.repos.d/epel.repo << 'EOF'
[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=https://mirrors.huaweicloud.com/epel/7/$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=https://mirrors.huaweicloud.com/epel/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=https://mirrors.huaweicloud.com/epel/7/$basearch/debug
failovermethod=priority
enabled=0
gpgkey=https://mirrors.huaweicloud.com/epel/RPM-GPG-KEY-EPEL-7
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=https://mirrors.huaweicloud.com/epel/7/SRPMS
failovermethod=priority
enabled=0
gpgkey=https://mirrors.huaweicloud.com/epel/RPM-GPG-KEY-EPEL-7
gpgcheck=1
EOF
```