cluster-autoscaler.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-addon: cluster-autoscaler.addons.k8s.io
    k8s-app: cluster-autoscaler
  name: cluster-autoscaler
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-autoscaler
  labels:
    k8s-addon: cluster-autoscaler.addons.k8s.io
    k8s-app: cluster-autoscaler
rules:
- apiGroups: [""]
  resources: ["events","endpoints"]
  verbs: ["create", "patch"]
- apiGroups: [""]
  resources: ["pods/eviction"]
  verbs: ["create"]
- apiGroups: [""]
  resources: ["pods/status"]
  verbs: ["update"]
- apiGroups: [""]
  resources: ["endpoints"]
  resourceNames: ["cluster-autoscaler"]
  verbs: ["get","update"]
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["watch","list","get","update"]
- apiGroups: [""]
  resources: ["pods","services","replicationcontrollers","persistentvolumeclaims","persistentvolumes"]
  verbs: ["watch","list","get"]
- apiGroups: ["extensions"]
  resources: ["replicasets","daemonsets"]
  verbs: ["watch","list","get"]
- apiGroups: ["policy"]
  resources: ["poddisruptionbudgets"]
  verbs: ["watch","list"]
- apiGroups: ["apps"]
  resources: ["statefulsets","replicasets","daemonsets"]
  verbs: ["watch","list","get"]
- apiGroups: ["storage.k8s.io"]
  resources: ["storageclasses"]
  verbs: ["watch","list","get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: cluster-autoscaler
  namespace: kube-system
  labels:
    k8s-addon: cluster-autoscaler.addons.k8s.io
    k8s-app: cluster-autoscaler
rules:
- apiGroups: [""]
  resources: ["configmaps"]
  verbs: ["create"]
- apiGroups: [""]
  resources: ["configmaps"]
  resourceNames: ["cluster-autoscaler-status"]
  verbs: ["delete","get","update"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: cluster-autoscaler
  labels:
    k8s-addon: cluster-autoscaler.addons.k8s.io
    k8s-app: cluster-autoscaler
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-autoscaler
subjects:
  - kind: ServiceAccount
    name: cluster-autoscaler
    namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: cluster-autoscaler
  namespace: kube-system
  labels:
    k8s-addon: cluster-autoscaler.addons.k8s.io
    k8s-app: cluster-autoscaler
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: cluster-autoscaler
subjects:
  - kind: ServiceAccount
    name: cluster-autoscaler
    namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: cloud-config
data:
  grpc.conf: |-
    address: <YOUR_GRPC_SERVER_FQCN_OR_IP>
    port: <YOUR_GRPC_SERVER_PORT>
    identifier: <SECRET/IDENTIFIER SHARED BETWEEN CLIENT_SERVER>
    timeout: <GRPC_TIMEOUT_IN_SECONDS>
    config:
        kubeAdmAddress: <ADDRESS MASTER CLUSTER>
        kubeAdmToken: <KUBEADM TOKEN TO JOIN>
        kubeAdmCACert: "sha256:CA CERT"
        kubeAdmExtraArguments:
            - --ignore-preflight-errors=All
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: cluster-autoscaler
  namespace: kube-system
  labels:
    app: cluster-autoscaler
spec:
  replicas: 1
  selector:
    matchLabels:
      app: cluster-autoscaler
  template:
    metadata:
      labels:
        app: cluster-autoscaler
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      serviceAccountName: cluster-autoscaler
      containers:
        - image: fred78290/cluster-autoscaler:v1.19.0
          name: cluster-autoscaler
          resources:
            limits:
              cpu: 100m
              memory: 300Mi
            requests:
              cpu: 100m
              memory: 300Mi
          command:
            - ./cluster-autoscaler
            - -v=4
            - --stderrthreshold=info
            - --cloud-provider=grpc
            - --cloud-config=/etc/cluster-autoscaler/grpc.conf
            - --nodes=$(MINNODES):$(MAXNODES):true/$(NODEGROUP_ID)
            - --nodes=0:3:true/ca-grpc-multipass
            - --max-nodes-total=3
            - --cores-total=0:16
            - --memory-total=2:24
            - --node-autoprovisioning-enabled
            - --max-autoprovisioned-node-group-count=1
            - --scale-down-enabled=true
            - --scale-down-delay-after-add=1m
            - --scale-down-delay-after-delete=1m
            - --scale-down-delay-after-failure=1m
            - --scale-down-unneeded-time=1m
            - --scale-down-unready-time=1m"
          imagePullPolicy: "Always"
          env:
          - name: MINNODES
            value: "1"
          - name: MAXNODES
            value: "5"
          - name: NODEGROUP_ID
            value: grpc-cloudprovider-id
          volumeMounts:
            - name: ssl-certs
              mountPath: /etc/ssl/certs/ca-certificates.crt
              readOnly: true
            - name: cloud-config
              mountPath: /etc/cluster-autoscaler
              readOnly: true
      volumes:
        - name: cloud-config
          configMap:
            name: cloud-config
        - name: ssl-certs
          hostPath:
            path: "/etc/ssl/certs/ca-certificates.crt"