Error: Failed to download metadata for repo 'baseos' / 'appstream' - Centos 8

The reason you're seeing this error is because CentOS 8 went EOL 12/31/21 (deadline extended to today - 1/31/22), and the official repo was moved to vault.centos.org. Therefore, we do not keep mirrors for this anymore.

The following page provides more information on this:

https://www.centos.org/centos-linux-eol/

Therefore, you may want to consider using CentOS 7 (EOL 2024-06-30) or CentOS Stream 8 (EOL 2024-05-31).

While it's not recommended, if you prefer to continue using CentOS 8 for the time being, you can do the following:

1. Open your CentOS-Linux-AppStream.repo and CentOS-Linux-BaseOS.repo files in vim or nano.
2. Comment out:

CentOS-Linux-BaseOS.repo
#baseurl=http://mirrors.linode.com/$contentdir/$releasever/BaseOS/$basearch/os/

CentOS-Linux-AppStream.repo
#baseurl=http://mirrors.linode.com/$contentdir/$releasever/AppStream/$basearch/os/

1. Add the following line to each respective file:

CentOS-Linux-BaseOS.repo
baseurl=http://vault.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/

CentOS-Linux-AppStream.repo
baseurl=http://vault.centos.org/$contentdir/$releasever/AppStream/$basearch/os/

1. Save each file and exit.
2. Run yum update again.

We will continue to offer Centos 8 for six months after EOL and will mark the Centos 8 distro as deprecated soon so as not to cause further confusion.

Open your CentOS-Linux-AppStream.repo and CentOS-Linux-BaseOS.repo files in vim or nano.

Just to add these files are located in /etc/yum.repos.d (took me a while to find them). This fixed the problem.

I also required to reboot the VM. Not sure if this was just a coincidence.
Thanks

Hi, It works for me (yum update). Thanks

For me, with a fresh Linode image install of CentOS Stream 9 Disk, I had to log in an run:

dnf config-manager --set-enabled crb
dnf install epel-release epel-next-release

as documented via https://docs.fedoraproject.org/en-US/epel/
along with a

yum update

and reboot, I was done and went on to installing Longview

I had to do a bit more than listed above. In the end, I move side the contents of /etc/yum.repos.d and created the following file:

CentOS-Base.repo (contents).

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

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

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

[centosplus]
name=CentOS Linux $releasever - Plus
baseurl=https://vault.centos.org/$contentdir/$releasever/centosplus/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial