kube/kube-system/descheduler.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: descheduler
  namespace: kube-system
  labels:
    app.kubernetes.io/name: descheduler
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: descheduler
  namespace: kube-system
  labels:
    app.kubernetes.io/name: descheduler
data:
  policy.yaml: |
    apiVersion: "descheduler/v1alpha1"
    kind: "DeschedulerPolicy"
    strategies:
      LowNodeUtilization:
        enabled: true
        params:
          nodeResourceUtilizationThresholds:
            targetThresholds:
              cpu: 50
              memory: 50
              pods: 50
            thresholds:
              cpu: 20
              memory: 20
              pods: 20
      RemoveDuplicates:
        enabled: true
      RemovePodsHavingTooManyRestarts:
        enabled: true
        params:
          podsHavingTooManyRestarts:
            includingInitContainers: true
            podRestartThreshold: 100
      RemovePodsViolatingInterPodAntiAffinity:
        enabled: true
      RemovePodsViolatingNodeAffinity:
        enabled: true
        params:
          nodeAffinityType:
          - requiredDuringSchedulingIgnoredDuringExecution
      RemovePodsViolatingNodeTaints:
        enabled: true
      RemovePodsViolatingTopologySpreadConstraint:
        enabled: true
        params:
          includeSoftConstraints: false
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: descheduler
  labels:
    app.kubernetes.io/name: descheduler
rules:
- apiGroups: ["events.k8s.io"]
  resources: ["events"]
  verbs: ["create", "update"]
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["get", "watch", "list"]
- apiGroups: [""]
  resources: ["namespaces"]
  verbs: ["get", "watch", "list"]
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "watch", "list", "delete"]
- apiGroups: [""]
  resources: ["pods/eviction"]
  verbs: ["create"]
- apiGroups: ["scheduling.k8s.io"]
  resources: ["priorityclasses"]
  verbs: ["get", "watch", "list"]
- apiGroups: ["coordination.k8s.io"]
  resources: ["leases"]
  verbs: ["create", "update"]
- apiGroups: ["coordination.k8s.io"]
  resources: ["leases"]
  resourceNames: ["descheduler"]
  verbs: ["get", "patch", "delete"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: descheduler
  labels:
    app.kubernetes.io/name: descheduler
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: descheduler
subjects:
  - kind: ServiceAccount
    name: descheduler
    namespace: kube-system
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: descheduler
  namespace: kube-system
  labels:
    app.kubernetes.io/name: descheduler
spec:
  replicas: 2
  selector:
    matchLabels: &selectorLabels
      app.kubernetes.io/name: descheduler
  template:
    metadata:
      labels: *selectorLabels
    spec:
      priorityClassName: system-cluster-critical
      serviceAccountName: descheduler
      containers:
        - name: descheduler
          image: "k8s.gcr.io/descheduler/descheduler:v0.25.1"
          imagePullPolicy: IfNotPresent
          command:
            - "/bin/descheduler"
          args:
            - "--policy-config-file"
            - "/policy-dir/policy.yaml"
            - "--descheduling-interval"
            - 5m
            - "--v"
            - "3"
            - --leader-elect=true
          ports:
            - containerPort: 10258
              protocol: TCP
          livenessProbe:
            failureThreshold: 3
            httpGet:
              path: /healthz
              port: 10258
              scheme: HTTPS
            initialDelaySeconds: 3
            periodSeconds: 10
          resources:
            requests:
              cpu: 500m
              memory: 256Mi
          securityContext:
            allowPrivilegeEscalation: false
            capabilities:
              drop:
                - ALL
            privileged: false
            readOnlyRootFilesystem: true
            runAsNonRoot: true
          volumeMounts:
            - mountPath: /policy-dir
              name: policy-volume
      volumes:
        - name: policy-volume
          configMap:
            name: descheduler