'appstream' Centos 8 Docker //top\\ — Failed To Download Metadata For Repo

To resolve this, you must redirect the repository URLs from the dead mirrors to the official CentOS vault. You can do this by adding sed commands to your Dockerfile before any yum install or dnf update steps.

The error in a Docker environment occurs because CentOS 8 reached its End of Life (EOL) on December 31, 2021. Consequently, the official mirrorlist.centos.org domain was decommissioned, and the project moved its package repositories to an archive server: vault.centos.org . Why This Error Happens To resolve this, you must redirect the repository

When you run a dnf or yum command inside a CentOS 8 Docker container, the package manager attempts to contact the old mirrorlist servers to find the best local download source. Since these servers no longer respond, the "AppStream" repository (and others) fails to synchronize its metadata. How to Fix the Error in Your Dockerfile Consequently, the official mirrorlist