While migrating my kubernetes cluster from Docker runtime engine to CRI-O, I faced error below,
[root@cntmaster ~]# yum update CentOS Linux 8 - AppStream 59 B/s | 38 B 00:00 Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
This error occured since I am using old CentOS 8 which is EOL from Dec 31 onwards. So I need to migrate my systems to CentOS 8 Stream.
To resolve this, I followed official guidelines by CentOS project, whereby I need to disable all exiting repos and enable new stream repos.
[root@cntworker centos]# dnf --disablerepo '*' --enablerepo extras swap centos-linux-repos centos-stream-repos Installed: centos-stream-repos-8-3.el8.noarch Removed: centos-linux-repos-8-3.el8.noarch Complete! [root@cntworker centos]# dnf distro-sync
Although, CentOS is EOL now, so easiest and best approach is migrate my cluster to Ubuntu or any other LTS distribution, But I am too lazy to do that. Cheers 🙂