rke2-coredns: fix an issue where node-local-dns did not work with cilium and lrp

For now the Local Redirect Policy feature of cilium is buggy so we can't redirect packets by service. Instead we match the rke2-coredns Service IP address to redirect the packets to the node-local-dns pod.

Author: thomasferrandiz

packages/rke2-coredns/generated-changes/overlay/templates/daemonset-nodelocal.yaml

@@ -33,11 +33,11 @@ spec:
       dnsPolicy: Default  # Don't use cluster DNS.
       tolerations:
       - operator: Exists
-{{- if eq .Values.nodelocal.ipvs false }}
+{{- if and (eq .Values.nodelocal.ipvs false) (eq .Values.nodelocal.use_cilium_lrp false) }}
       initContainers:
       - name: wait-coredns
         image: {{ template "system_default_registry" . }}{{ .Values.nodelocal.initimage.repository }}:{{ .Values.nodelocal.initimage.tag }}
-        command: ['sh', '-c', "until nc -zv -u {{ template "clusterDNSServerIP" . }} 53; do echo waiting for dns service; sleep 2; done"]
+        command: ['sh', '-c', 'until nc -zv -u {{ template "clusterDNSServerIP" . }} 53; do echo waiting for dns service; sleep 2; done']
 {{- end }}
       containers:
       - name: node-cache
@@ -62,10 +62,10 @@ spec:
           privileged: true
         ports:
         - containerPort: 53
-          name: udp-53
+          name: dns
           protocol: UDP
         - containerPort: 53
-          name: tcp-53
+          name: dns-tcp
           protocol: TCP
         - containerPort: 9253
           name: metrics

packages/rke2-coredns/generated-changes/overlay/templates/lrp-nodelocal.yaml

@@ -4,19 +4,26 @@ kind: CiliumLocalRedirectPolicy
 metadata:
   name: "lrp-nodelocal"
 spec:
+  skipRedirectFromBackend: true
   redirectFrontend:
-    serviceMatcher:
-      serviceName: {{ default (include "coredns.fullname" .) .Values.service.name }}
-      namespace: {{ .Release.Namespace }}
+    addressMatcher:
+      ip: "{{ template "clusterDNSServerIP" . }}"
+      toPorts:
+        - name: tcp-53
+          port: "53"
+          protocol: TCP
+        - name: udp-53
+          port: "53"
+          protocol: UDP
   redirectBackend:
     localEndpointSelector:
       matchLabels:
         k8s-app: node-local-dns
     toPorts:
       - port: "53"
-        name: udp-53
+        name: dns
         protocol: UDP
       - port: "53"
-        name: tcp-53
+        name: dns-tcp
         protocol: TCP
 {{- end }}

packages/rke2-coredns/package.yaml

@@ -1,2 +1,2 @@
 url: https://github.com/coredns/helm/releases/download/coredns-1.44.3/coredns-1.44.3.tgz
-packageVersion: 00
+packageVersion: 01