k3s coredns-autoscaler.yml

coredns-autoscaler.yml

kind: ServiceAccount
apiVersion: v1
metadata:
  name: coredns-autoscaler
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: system:coredns-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:coredns-autoscaler
subjects:
  - kind: ServiceAccount
    name: coredns-autoscaler
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: system:coredns-autoscaler
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: coredns-autoscaler
  namespace: kube-system
  labels:
    k8s-app: coredns-autoscaler
spec:
  selector:
    matchLabels:
      k8s-app: coredns-autoscaler
  template:
    metadata:
      labels:
        k8s-app: coredns-autoscaler
    spec:
      containers:
      - name: autoscaler
        image: k8s.gcr.io/cluster-proportional-autoscaler-amd64:1.7.1
        resources:
            requests:
                cpu: "20m"
                memory: "10Mi"
        command:
          - /cluster-proportional-autoscaler
          - --namespace=kube-system
          - --configmap=coredns-autoscaler
          - --target=deployment/coredns
          - --default-params={"linear":{"coresPerReplica":256,"nodesPerReplica":16,"preventSinglePointFailure":true}}
          - --logtostderr=true
          - --v=2
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"
      serviceAccountName: coredns-autoscaler