Migrating from CentOS 8 to AlmaLinux 8

Since January 2022, support for CentOS 8 has ended. Installation and operation of the control panel on a server with CentOS 8 is not supported.

To continue working with the control panel, you can migrate to AlmaLinux OS using the almalinux-deploy script:

1. Connect to the server with the conrol panel via SSH.
2. Check the OS version: 

   cat /etc/redhat-release

3. If the OS version is lower than 8.5, change the paths to the repositories: 

   sed -i -r 's|^(mirrorlist.+)$|#\1|g; s|^#baseurl=http://mirror.centos.org/\$contentdir/\$releasever/|baseurl=https://vault.centos.org/8.5.2111/|g' /etc/yum.repos.d/CentOS-*.repo

4. Update software:

   sudo yum update -y

5. Download the migration script:

   curl -O https://raw.githubusercontent.com/AlmaLinux/almalinux-deploy/master/almalinux-deploy.sh

6. Run the script:

   sudo bash almalinux-deploy.sh

   Message on successful script execution

   Migration to AlmaLinux is completed

7. If the script run fails with an error like 

   Example of error

   Verify almalinux-release-latest.rpm package                           ERROR
       /root/.alma.X46iDx/almalinux-release-latest.rpm: digests SIGNATURES NOT OK

   import the GPG key of the AlmaLinux repository manually and restart the script:

   sudo rpm --import https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux && sudo bash almalinux-deploy.sh

8. Check that AlmaLinux has been installed:

   cat /etc/redhat-release

   Example of reply

   AlmaLinux release 8.5 (Arctic Sphynx)

9. Check that the AlmaLinux kernel is loaded by default:

   sudo grubby --info DEFAULT | grep AlmaLinux

   Example of reply

   title="AlmaLinux (4.18.0-348.el8.x86_64) 8.5 (Arctic Sphynx)"