When installing Docker on an Alibaba Cloud server running CentOS 8, a repository not found error occurred, as shown below:

Solution

Approach: Install Docker using the Docker repository.

Set Up the Repository

Install the required packages. Here, yum-utils is installed; yum-utils provides yum-config-manager, while the device mapper storage driver requires device-mapper-persistent-data and lvm2.

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sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2

Configure the Alibaba Cloud Mirror in China

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sudo yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

Install docker-ce

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sudo yum install docker-ce docker-ce-cli containerd.io

P.S. If the installation fails, click here.