Draft: [Magnum] Coredns via helm

https://its.cern.ch/jira/browse/OS-14231

magnum/drivers/common/templates/kubernetes/fragments/core-dns-service.sh

@@ -6,6 +6,11 @@ printf "Starting to run ${step}\n"
 _dns_prefix=${CONTAINER_INFRA_PREFIX:-docker.io/coredns/}
 _autoscaler_prefix=${CONTAINER_INFRA_PREFIX:-gcr.io/google_containers/}
 
+cern_chart_version=$(echo ${CERN_CHART_VERSION} | cut -d. -f2)
+cern_chart_enabled=$(echo "${CERN_CHART_ENABLED}" | tr '[:upper:]' '[:lower:]')
+
+if [ "${cern_chart_enabled}" != "true" ] && [ ${cern_chart_version} -ge 9 ]; then
+
 CORE_DNS=/srv/magnum/kubernetes/manifests/kube-coredns.yaml
 [ -f ${CORE_DNS} ] || {
     echo "Writing File: $CORE_DNS"
@@ -305,4 +310,6 @@ done
 
 kubectl apply --validate=false -f $CORE_DNS
 
+fi
+
 printf "Finished running ${step}\n"