Stuck with Updating Plesk or system packages on CentOS 8 server fails? We can help you.

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How to resolve Updating Plesk or system packages fails?

Plesk is a commercial web hosting and server data center automation software with a control panel developed for Linux and Windows-based retail hosting service providers.

Plesk automates various tasks and processes on a single or multiple servers.

Basically, after updating Plesk or system packages either via Tools & Settings > System Updates or manually with dnf update on a server with CentOS 8 fails with below error:

Failed to check system configuration – Yum utility finished with errors. Installation may fail.
dnf.exceptions.RepoError: Failed to download metadata for repo ‘appstream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist

Plesk pre-upgrade check

Error: Cache-only enabled but no cache for ‘appstream’
WARNING: Unable to detect package duplicates: /usr/bin/package-cleanup –dupes returns 1.Output is:

Today, let us see the steps followed by our Support techs to resolve it:

• Convert the server in-place to AlmaLinux 8, Rocky Linux 8, or CloudLinux 8 (note that CloudLinux is a paid OS).
• Deploy a new Plesk server with a supported operating system and migrate to it using Plesk Migrator.
• Temporary solution: configure archived repositories.

  1. Firstly, connect to the server using SSH.
  2. Then, edit the files /etc/yum.repos.d/CentOS-Linux-AppStream.repo, /etc/yum.repos.d/CentOS-Linux-BaseOS.repo, and /etc/yum.repos.d/CentOS-Linux-PowerTools.repo so they look like below:
     • /etc/yum.repos.d/CentOS-Linux-AppStream.repo:

       [appstream]
       name=CentOS Linux $releasever – AppStream
       baseurl=http://vault.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
       gpgcheck=1
       enabled=1
       gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

     • /etc/yum.repos.d/CentOS-Linux-BaseOS.repo:

       [baseos]
       name=CentOS Linux $releasever – BaseOS
       baseurl=http://vault.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
       gpgcheck=1
       enabled=1
       gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

     • /etc/yum.repos.d/CentOS-Linux-PowerTools.repo:

       [powertools]
       name=CentOS Linux $releasever – PowerTools
       baseurl=http://vault.centos.org/$contentdir/$releasever/PowerTools/$basearch/os/
       gpgcheck=1
       enabled=1
       gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

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Conclusion

To sum up, our skilled Support Engineers at Bobcares demonstrated how to resolve Updating Plesk or system packages.