---
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:
      - "namespaces"
      - "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", "csinodes", "csidrivers", "csistoragecapacities"]
    verbs: ["watch", "list", "get"]
  - apiGroups: ["batch", "extensions"]
    resources: ["jobs"]
    verbs: ["get", "list", "watch", "patch"]
  - apiGroups: ["coordination.k8s.io"]
    resources: ["leases"]
    verbs: ["create"]
  - apiGroups: ["coordination.k8s.io"]
    resourceNames: ["cluster-autoscaler"]
    resources: ["leases"]
    verbs: ["get", "update"]
---
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", "list", "watch"]
  - apiGroups: [""]
    resources: ["configmaps"]
    resourceNames:
      ["cluster-autoscaler-status", "cluster-autoscaler-priority-expander"]
    verbs: ["delete", "get", "update", "watch"]

---
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: 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:
        prometheus.io/scrape: "true"
        prometheus.io/port: "8085"
    spec:
      tolerations:
        - effect: NoSchedule
          key: node-role.kubernetes.io/control-plane
      # Node affinity is used to force cluster-autoscaler to stick
      # to the master node. This allows the cluster to reliably downscale
      # to zero worker nodes when needed.
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: node-role.kubernetes.io/control-plane
                    operator: Exists
      serviceAccountName: cluster-autoscaler
      containers:
        - image: registry.k8s.io/autoscaling/cluster-autoscaler:v1.27.3
          name: cluster-autoscaler
          resources:
            limits:
              cpu: 100m
              memory: 300Mi
            requests:
              cpu: 100m
              memory: 300Mi
          imagePullPolicy: Always
          env:
            - name: BOOTSTRAP_TOKEN_ID
              valueFrom:
                secretKeyRef:
                  name: bootstrap-token-cluster-autoscaler-equinixmetal
                  key: token-id
            - name: BOOTSTRAP_TOKEN_SECRET
              valueFrom:
                secretKeyRef:
                  name: bootstrap-token-cluster-autoscaler-equinixmetal
                  key: token-secret
            - name: METAL_AUTH_TOKEN
              valueFrom:
                secretKeyRef:
                  name: cluster-autoscaler-equinixmetal
                  key: authtoken
          # You can take advantage of multiple nodepools by adding
          # extra arguments on the cluster-autoscaler command.
          # e.g. for pool1, pool2
          # --nodes=0:10:pool1
          # --nodes=0:10:pool2
          command:
            - ./cluster-autoscaler
            - --alsologtostderr
            - --cluster-name=cluster1
            - --cloud-config=/config/cloud-config
            - --cloud-provider=equinixmetal
            - --expander=price
            - --nodes=0:10:pool1
            - --nodes=0:10:pool2
            - --scale-down-unneeded-time=1m0s
            - --scale-down-delay-after-add=1m0s
            - --scale-down-unready-time=1m0s
            - --v=2
          volumeMounts:
            - name: cloud-config
              mountPath: /config
              readOnly: true
      volumes:
        - name: cloud-config
          secret:
            secretName: cluster-autoscaler-cloud-config