CentOS Stream 8 mirror infrastructure is no more. Use Vault!

tests/Dockerfile.kerberos

@@ -5,6 +5,10 @@ EXPOSE 88
 COPY ./krb5.conf /etc/
 COPY ./ktutil.instructions /tmp/
 
+# Mirrorlist URLs are dead, use the Vault!
+COPY ./vault.repo /etc/yum.repos.d/
+RUN rm -rf /etc/yum.repos.d/CentOS-Stream-*.repo
+
 RUN dnf -y --setopt=tsflags=nodocs install krb5-server krb5-workstation  && \
     sed -i "s/EXAMPLE.COM/KIWITCMS.ORG/g" /var/kerberos/krb5kdc/kdc.conf && \
     sed -i "s/@EXAMPLE.COM//" /var/kerberos/krb5kdc/kadm5.acl            && \

tests/vault.repo

@@ -0,0 +1,13 @@
+[vault-baseos]
+name=CentOS Stream $releasever - BaseOS
+baseurl=https://vault.centos.org/$stream/BaseOS/$basearch/os/
+gpgcheck=1
+enabled=1
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
+
+[vault-appstream]
+name=CentOS Stream $releasever - AppStream
+baseurl=https://vault.centos.org/$stream/AppStream/$basearch/os/
+gpgcheck=1
+enabled=1
+gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial