Scenarios

When updating the OS or software of an ECS, you can access the Internet through the ECS and use an external EPEL image source. However, if your ECS cannot access the Internet, or the external EPEL image source cannot provide services stably, you can use the EPEL image source provided by HUAWEI CLOUD.

Constraints

• This section applies only to the following regions: CN North-Beijing1, CN North-Beijing4, CN East-Shanghai1, CN East-Shanghai2, CN South-Guangzhou, and AP-Hong Kong.
• Make sure that the intranet DNS server provided by HUAWEI CLOUD has been configured.

  For instructions about how to obtain an intranet DNS server, see What Are the Private DNS Server Addresses Provided by the DNS Service?

  For instructions about how to configure a DNS server, see Configuring DNS.

• The operations described in this section apply to both x86_64 and Arm (Kunpeng) ECSs.

Procedure

1. Log in to the ECS as user root.
2. (Optional) Run the following command to back up the epel.repo file:

   mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.bak

   

   Perform this step only if the epel.repo file is available.

3. Run the following commands to install epel-xxx-noarch.rpm and obtain the configuration file:
   • For CentOS 6 or RHEL 6

     rpm -ivh http://mirrors.myhuaweicloud.com/epel/epel-release-latest-6.noarch.rpm

     wget -qO /etc/yum.repos.d/epel.repo http://mirrors.myhuaweicloud.com/repo/epel-6.repo

   • For CentOS 7 or RHEL 7

     rpm -ivh http://mirrors.myhuaweicloud.com/epel/epel-release-latest-7.noarch.rpm

     wget -qO /etc/yum.repos.d/epel.repo http://mirrors.myhuaweicloud.com/repo/epel-7.repo

4. Run the following command to generate a cache:

   yum clean metadata

   yum makecache

   yum install epel-release -y >/dev/null 2>&1

   

   • After the command is executed, if the system displays the message "Another app is currently holding the yum lock", run the rm -rf /var/run/yum.pid command to delete the yum.pid file. Then, run the yum makecache command again to generate the cache.
   • After the command is executed, if the system displays the message "Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again", run the following command to update the certificate for temporarily disabling the EPEL image source:

     yum --disablerepo=epel -y update ca-certificates

   • If certain packages are unavailable, this issue may be caused by in-progress data synchronization. In such a case, try again several hours later.