How to resolve errors in executing the yum makecache command

Test environment ：Docker Installed in Centos(docker pull centos)
Error description ：”http://centos.mirror.iweb.ca/7/addons/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found”

Be careful ： from docker Obtained from the official website centos The image is not installed by default wget command , We need to install it ourselves
To solve the process ：

1. install wget Installation package wget-1.14-15.el7.x86_64

2. Will download rpm Package copy to centos In the system , Copy command ：
   docker cp /home/download/wget-1.14-15.el7.x86_64.rpm container_name:/home/outdisk/
   docker cp The command can copy files or folders between the local file system and the container , Standard usage ：

   Usage: docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH|-
   docker cp [OPTIONS] SRC_PATH|- CONTAINER:DEST_PATH

3. Carry out orders , complete wget Command installation .

   rpm -ivh wget-1.14-15.el7.x86_64.rpm

   in addition , If there are already yum Source , You can go through yun Source command to install wget：

   yum -y install wget

4. Get into yum Source configuration directory
   cd /etc/yum.repos.d/

5. Carry out orders , obtain sohu Software sources

   wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
   After downloading ,yum.repos.d There will be an extra file ：CentOS-Base-sohu.repo
   

6. Update play yum After source , Execute the following command to update yum To configure , Make the operation effective immediately
   yum makecache

7. Be careful ： In this step, the error message to be solved in this article will appear , terms of settlement ：

   Edit the file ： /etc/yum.repos.dCentOS-Base-sohu.repo
   The original text has such a paragraph
   [addons]
   name=CentOS-$releasever - Addons - sohu.com
   mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
   baseurl=http://mirrors.sohu.com/centos/$releasever/addons/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

   It only needs a small change to solve ,addons–> os

   [addons]
   name=CentOS-$releasever - Addons - sohu.com
   mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
   baseurl=http://mirrors.sohu.com/centos/$releasever/os/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

8. Run again yum makecache , Without accident, the last order will be executed perfectly ！
   

Resources for this article ：

• to linux add to yum Source .（ It's very useful ）
• CentOS7：ifconfig command not found solve
• centos Next wget: command not found Solutions for
• Cannot retrieve repository metadata (repomd.xml) for repository: addons.（ Solution ）