[WIP]Add new coredns chart

It includes:
* coredns autoscaler
* helm chart upgrade to 1.16.2
* coredns image upgrade to 1.8.3

Signed-off-by: Manuel Buil <mbuil@suse.com>

Dockerfile

@@ -97,7 +97,7 @@ RUN CHART_VERSION="1.9.808"                   CHART_FILE=/charts/rke2-cilium.yam
 RUN CHART_VERSION="v3.19.1-build2021061107"   CHART_FILE=/charts/rke2-canal.yaml          CHART_BOOTSTRAP=true   /charts/build-chart.sh
 RUN CHART_VERSION="v3.1907"                   CHART_FILE=/charts/rke2-calico.yaml         CHART_BOOTSTRAP=true   /charts/build-chart.sh
 RUN CHART_VERSION="v1.0.007"                  CHART_FILE=/charts/rke2-calico-crd.yaml     CHART_BOOTSTRAP=true   /charts/build-chart.sh
-RUN CHART_VERSION="1.10.101-build2021022304"  CHART_FILE=/charts/rke2-coredns.yaml        CHART_BOOTSTRAP=true   /charts/build-chart.sh
+RUN CHART_VERSION="1.16.201-build2021072301"  CHART_FILE=/charts/rke2-coredns.yaml        CHART_BOOTSTRAP=true   /charts/build-chart.sh
 RUN CHART_VERSION="3.34.001"                  CHART_FILE=/charts/rke2-ingress-nginx.yaml  CHART_BOOTSTRAP=false  /charts/build-chart.sh
 RUN CHART_VERSION="v1.21.3-rke2r1-build2021072101" \
     CHART_PACKAGE="rke2-kube-proxy-1.21"      CHART_FILE=/charts/rke2-kube-proxy.yaml     CHART_BOOTSTRAP=true   /charts/build-chart.sh

docs/networking.md

@@ -16,6 +16,8 @@ CoreDNS is deployed by default when starting the server. To disable, run each se
 
 If you don't install CoreDNS, you will need to install a cluster DNS provider yourself.
 
+CoreDNS is deployed with the [autoscaler](https://github.com/kubernetes-incubator/cluster-proportional-autoscaler) by default. To disable it or change its config, use the [HelmChartConfig](https://docs.rke2.io/helm/#customizing-packaged-components-with-helmchartconfig) resource.
+
 ## Nginx Ingress Controller
 
 [nginx-ingress](https://github.com/kubernetes/ingress-nginx) is an Ingress controller powered by NGINX that uses a ConfigMap to store the NGINX configuration.

scripts/build-images

@@ -13,7 +13,8 @@ EOF
 
 xargs -n1 -t docker image pull --quiet << EOF >> build/images-core.txt
     ${REGISTRY}/rancher/hardened-kubernetes:${KUBERNETES_IMAGE_TAG}
-    ${REGISTRY}/rancher/hardened-coredns:v1.6.9-${IMAGE_BUILD_VERSION}
+    ${REGISTRY}/rancher/hardened-coredns:v1.8.3-${IMAGE_BUILD_VERSION}
+    ${REGISTRY}/rancher/mirrored-cluster-proportional-autoscaler:1.8.3
     ${REGISTRY}/rancher/hardened-etcd:${ETCD_VERSION}-${IMAGE_BUILD_VERSION}
     ${REGISTRY}/rancher/hardened-k8s-metrics-server:v0.3.6-${IMAGE_BUILD_VERSION}
     ${REGISTRY}/rancher/klipper-helm:v0.6.1-build20210616