From 5516ad195c2dd6cf3c827557cd1dea578bdde76b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lauri=20V=C3=B5sandi?= <lauri@k-space.ee>
Date: Fri, 23 Dec 2022 23:30:39 +0200
Subject: [PATCH] Add descheduler

---
 kube-system/descheduler.yaml | 165 +++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 kube-system/descheduler.yaml

diff --git a/kube-system/descheduler.yaml b/kube-system/descheduler.yaml
new file mode 100644
index 0000000..1412d59
--- /dev/null
+++ b/kube-system/descheduler.yaml
@@ -0,0 +1,165 @@
+---
+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