desheduler

descheduler/job.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: descheduler
+  namespace: kube-system
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: descheduler
+  template:
+    metadata:
+      labels:
+        app: descheduler
+    spec:
+      serviceAccountName: descheduler-sa
+      containers:
+      - name: descheduler
+        image: k8s.gcr.io/descheduler/descheduler:v0.32.1
+        command:
+        - /bin/descheduler
+        - --policy-config-file=/policy-dir/policy.yaml
+        volumeMounts:
+        - name: policy-volume
+          mountPath: /policy-dir
+      volumes:
+      - name: policy-volume
+        configMap:
+          name: descheduler-policy
+

descheduler/policy.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: descheduler-policy
+  namespace: kube-system
+data:
+  policy.yaml: |
+    apiVersion: "descheduler/v1alpha2"
+    kind: "DeschedulerPolicy"
+    profiles:
+      - name: ProfileName
+        pluginConfig:
+        - name: "LowNodeUtilization"
+          args:
+            thresholds:
+              "cpu": 20
+              "memory": 20
+              "pods": 20
+            targetThresholds:
+              "cpu": 50
+              "memory": 50
+              "pods": 50
+        plugins:
+          balance:
+            enabled:
+              - "LowNodeUtilization"
+

descheduler/rbac.yaml

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+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: descheduler-cluster-role
+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: ["policy"]
+  resources: ["poddisruptionbudgets"]
+  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"]
+- apiGroups: ["metrics.k8s.io"]
+  resources: ["nodes", "pods"]
+  verbs: ["get", "list"]
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: descheduler-sa
+  namespace: kube-system
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: descheduler-cluster-role-binding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: descheduler-cluster-role
+subjects:
+  - name: descheduler-sa
+    kind: ServiceAccount
+    namespace: kube-system