The following command will enable to use of the repository nightly. They can be enabled along with your stable repository. For more specific directions, refer to the Installation Source on a Hard Drive. Install it on a hard drive to use for installation sources. After that, you can install and upgrade Docker using the repositories. When you install Docker Engine for the first time in your new host, you will establish Docker Engine in the Docker repository. It also creates a docker group but it doesn’t join any of the members to the group automatically. It installs Docker however it does not begin Docker. If you still need to run your old CentOS 8, you can update the repos in /etc/ to use instead of. But what if you can’t afford this? Here’s a solution that worked for me. The proper way of handling the issue would be to migrate to CentOS Stream 8. CentOS 8 has reached its end-of-life on December 31, 2021, but the packages were kept on the official mirrors for a while. On January 31, 2022, CentOS team has finally removed all packages for CentOS 8 from the official mirrors. What is the reason behind this? Why did everything work fine just yesterday? This short article explains the reason of the error and how to solve it. The same issue could hit you if you use Docker container images based on centos:8 If you use CentOS 8, you might have noticed that starting from January 31, 2022, installing packges with yum no longer works with an error No URLs in mirrorlist, similar to the following: Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

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