Make CentOS 7 build after EOL

distros/centos/7/disc/ks.cfg

@@ -43,6 +43,11 @@ nmcli c
 %end
 
 %post --erroronfail
+
+echo "gpgkey=https://vault.centos.org/7.9.2009/os/x86_64/RPM-GPG-KEY-CentOS-7" >> /etc/yum.repos.d/base.repo
+echo "gpgkey=https://vault.centos.org/7.9.2009/os/x86_64/RPM-GPG-KEY-CentOS-7" >> /etc/yum.repos.d/updates.repo
+rm -f /etc/yum.repos.d/CentOS*
+
 yum -y update
 
 cat <<EOF > /etc/sudoers.d/vagrant

distros/centos/7/qemu.sh

@@ -1,11 +1,6 @@
 #!/usr/bin/env bash
 set -ex
 
-for f in /etc/yum.repos.d/*; do
-	echo "$f"
-	cat "$f"
-done
-cat /etc/yum.conf || true
 yum install -y qemu-guest-agent
 systemctl start qemu-guest-agent
 systemctl enable qemu-guest-agent