From cc27525690f6335b48cad5d815cedf2a23e37e56 Mon Sep 17 00:00:00 2001
From: Sabbir Ahmed Shameem <145862004+SAShameem@users.noreply.github.com>
Date: Sun, 5 May 2024 21:49:58 +0600
Subject: [PATCH] Create dns-horizontal-autoscaler.yaml

---
 .../admin/dns/dns-horizontal-autoscaler.yaml  | 87 +++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 content/bn/examples/admin/dns/dns-horizontal-autoscaler.yaml

diff --git a/content/bn/examples/admin/dns/dns-horizontal-autoscaler.yaml b/content/bn/examples/admin/dns/dns-horizontal-autoscaler.yaml
new file mode 100644
index 0000000000..3182fed3c8
--- /dev/null
+++ b/content/bn/examples/admin/dns/dns-horizontal-autoscaler.yaml
@@ -0,0 +1,87 @@
+kind: ServiceAccount
+apiVersion: v1
+metadata:
+  name: kube-dns-autoscaler
+  namespace: kube-system
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: system:kube-dns-autoscaler
+rules:
+  - apiGroups: [""]
+    resources: ["nodes"]
+    verbs: ["list", "watch"]
+  - apiGroups: [""]
+    resources: ["replicationcontrollers/scale"]
+    verbs: ["get", "update"]
+  - apiGroups: ["apps"]
+    resources: ["deployments/scale", "replicasets/scale"]
+    verbs: ["get", "update"]
+# Remove the configmaps rule once below issue is fixed:
+# kubernetes-incubator/cluster-proportional-autoscaler#16
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    verbs: ["get", "create"]
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: system:kube-dns-autoscaler
+subjects:
+  - kind: ServiceAccount
+    name: kube-dns-autoscaler
+    namespace: kube-system
+roleRef:
+  kind: ClusterRole
+  name: system:kube-dns-autoscaler
+  apiGroup: rbac.authorization.k8s.io
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kube-dns-autoscaler
+  namespace: kube-system
+  labels:
+    k8s-app: kube-dns-autoscaler
+    kubernetes.io/cluster-service: "true"
+spec:
+  selector:
+    matchLabels:
+      k8s-app: kube-dns-autoscaler
+  template:
+    metadata:
+      labels:
+        k8s-app: kube-dns-autoscaler
+    spec:
+      priorityClassName: system-cluster-critical
+      securityContext:
+        seccompProfile:
+          type: RuntimeDefault
+        supplementalGroups: [ 65534 ]
+        fsGroup: 65534
+      nodeSelector:
+        kubernetes.io/os: linux
+      containers:
+      - name: autoscaler
+        image: registry.k8s.io/cpa/cluster-proportional-autoscaler:1.8.4
+        resources:
+            requests:
+                cpu: "20m"
+                memory: "10Mi"
+        command:
+          - /cluster-proportional-autoscaler
+          - --namespace=kube-system
+          - --configmap=kube-dns-autoscaler
+          # Should keep target in sync with cluster/addons/dns/kube-dns.yaml.base
+          - --target=<SCALE_TARGET>
+          # When cluster is using large nodes(with more cores), "coresPerReplica" should dominate.
+          # If using small nodes, "nodesPerReplica" should dominate.
+          - --default-params={"linear":{"coresPerReplica":256,"nodesPerReplica":16,"preventSinglePointFailure":true,"includeUnschedulableNodes":true}}
+          - --logtostderr=true
+          - --v=2
+      tolerations:
+      - key: "CriticalAddonsOnly"
+        operator: "Exists"
+      serviceAccountName: kube-dns-autoscaler