custom config of coredns to deny ipv6 huggingface

infra/controllers/coredns.yaml

@@ -0,0 +1,200 @@
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    k8s-app: kube-dns
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: system:coredns
+  labels:
+    k8s-app: kube-dns
+rules:
+  - apiGroups: [""]
+    resources:
+      - endpoints
+      - services
+      - pods
+      - namespaces
+    verbs: ["list", "watch"]
+  - apiGroups: ["discovery.k8s.io"]
+    resources: ["endpointslices"]
+    verbs: ["list", "watch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: system:coredns
+  labels:
+    k8s-app: kube-dns
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: system:coredns
+subjects:
+  - kind: ServiceAccount
+    name: coredns
+    namespace: kube-system
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coredns
+  namespace: kube-system
+data:
+  Corefile: |-
+    .:53 {
+        errors
+        health {
+            lameduck 5s
+        }
+        ready
+        log . {
+            class error
+        }
+        prometheus :9153
+
+        # Return NODATA for AAAA on selected domains to force IPv4.
+        template IN AAAA {
+            match "(^|\\.)huggingface\\.co\\.$"
+            rcode NOERROR
+            fallthrough
+        }
+
+        kubernetes homelab.lumpiasty.xyz cluster.local in-addr.arpa ip6.arpa {
+            pods insecure
+            fallthrough in-addr.arpa ip6.arpa
+            ttl 30
+        }
+        forward . /etc/resolv.conf {
+            max_concurrent 1000
+        }
+        cache 30 {
+            disable success cluster.local
+            disable denial cluster.local
+        }
+        loop
+        reload
+        loadbalance
+    }
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    k8s-app: kube-dns
+    kubernetes.io/name: CoreDNS
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: kube-dns
+  template:
+    metadata:
+      labels:
+        k8s-app: kube-dns
+    spec:
+      priorityClassName: system-cluster-critical
+      serviceAccountName: coredns
+      tolerations:
+        - key: node-role.kubernetes.io/control-plane
+          operator: Exists
+          effect: NoSchedule
+      nodeSelector:
+        kubernetes.io/os: linux
+      containers:
+        - name: coredns
+          image: registry.k8s.io/coredns/coredns:v1.14.1
+          imagePullPolicy: IfNotPresent
+          args: ["-conf", "/etc/coredns/Corefile"]
+          ports:
+            - containerPort: 53
+              name: dns
+              protocol: UDP
+            - containerPort: 53
+              name: dns-tcp
+              protocol: TCP
+            - containerPort: 9153
+              name: metrics
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 8080
+              scheme: HTTP
+            initialDelaySeconds: 60
+            timeoutSeconds: 5
+            successThreshold: 1
+            failureThreshold: 5
+            periodSeconds: 10
+          readinessProbe:
+            httpGet:
+              path: /ready
+              port: 8181
+              scheme: HTTP
+            timeoutSeconds: 1
+            successThreshold: 1
+            failureThreshold: 3
+            periodSeconds: 10
+          resources:
+            limits:
+              memory: 170Mi
+            requests:
+              cpu: 0
+              memory: 70Mi
+          securityContext:
+            allowPrivilegeEscalation: false
+            capabilities:
+              add:
+                - NET_BIND_SERVICE
+              drop:
+                - ALL
+            readOnlyRootFilesystem: true
+          volumeMounts:
+            - name: config-volume
+              mountPath: /etc/coredns
+              readOnly: true
+      dnsPolicy: Default
+      volumes:
+        - name: config-volume
+          configMap:
+            name: coredns
+            items:
+              - key: Corefile
+                path: Corefile
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: kube-dns
+  namespace: kube-system
+  labels:
+    k8s-app: kube-dns
+    kubernetes.io/name: CoreDNS
+spec:
+  type: ClusterIP
+  clusterIP: 10.43.0.10
+  clusterIPs:
+    - 10.43.0.10
+    - 2001:470:61a3:300::a
+  ipFamilyPolicy: RequireDualStack
+  ipFamilies:
+    - IPv4
+    - IPv6
+  selector:
+    k8s-app: kube-dns
+  ports:
+    - name: dns
+      port: 53
+      protocol: UDP
+      targetPort: 53
+    - name: dns-tcp
+      port: 53
+      protocol: TCP
+      targetPort: 53

infra/kustomization.yaml

@@ -4,6 +4,7 @@ resources:
   - controllers/k8up-crd-4.8.3.yaml
   - controllers/cilium.yaml
   - controllers/nginx-ingress.yaml
+  - controllers/coredns.yaml
   - controllers/dns-public.yaml
   - controllers/cert-manager.yaml
   - controllers/cert-manager-webhook-ovh.yaml

talos/patches/controlplane.patch

@@ -14,7 +14,15 @@ machine:
     hostDNS:
       forwardKubeDNSToHost: false
 
+  kubelet:
+    clusterDNS:
+      - 10.43.0.10
+      - 2001:470:61a3:300::a
+
 cluster:
+  # We're configuring CoreDNS ourselves, so disable the default one
+  coreDNS:
+    disabled: true
   network:
     # Likely redundant, we use Cilium as IPAM with their CRDs
     podSubnets: