Merge pull request #572 from audip/feature/add-deployment-k8s-yaml-files

Add run descheduler as deployment

README.md

@@ -28,6 +28,7 @@ Table of Contents
 - [Quick Start](#quick-start)
   - [Run As A Job](#run-as-a-job)
   - [Run As A CronJob](#run-as-a-cronjob)
+  - [Run As A Deployment](#run-as-a-deployment)
   - [Install Using Helm](#install-using-helm)
   - [Install Using Kustomize](#install-using-kustomize)
 - [User Guide](#user-guide)
@@ -58,7 +59,7 @@ Table of Contents
 
 ## Quick Start
 
-The descheduler can be run as a Job or CronJob inside of a k8s cluster. It has the
+The descheduler can be run as a `Job`, `CronJob`, or `Deployment` inside of a k8s cluster. It has the
 advantage of being able to be run multiple times without needing user intervention.
 The descheduler pod is run as a critical pod in the `kube-system` namespace to avoid
 being evicted by itself or by the kubelet.
@@ -79,6 +80,14 @@ kubectl create -f kubernetes/base/configmap.yaml
 kubectl create -f kubernetes/cronjob/cronjob.yaml
 ```
 
+### Run As A Deployment
+
+```
+kubectl create -f kubernetes/base/rbac.yaml
+kubectl create -f kubernetes/base/configmap.yaml
+kubectl create -f kubernetes/deployment/deployment.yaml
+```
+
 ### Install Using Helm
 
 Starting with release v0.18.0 there is an official helm chart that can be used to install the
@@ -101,6 +110,11 @@ Run As A CronJob
 kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/cronjob?ref=v0.21.0' | kubectl apply -f -
 ```
 
+Run As A Deployment
+```
+kustomize build 'github.com/kubernetes-sigs/descheduler/kubernetes/deployment?ref=v0.21.0' | kubectl apply -f -
+```
+
 ## User Guide
 
 See the [user guide](docs/user-guide.md) in the `/docs` directory.

kubernetes/deployment/deployment.yaml

@@ -0,0 +1,54 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: descheduler
+  namespace: kube-system
+  labels:
+    app: descheduler
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: descheduler
+  template:
+    metadata:
+      labels:
+        app: descheduler
+    spec:
+      priorityClassName: system-cluster-critical
+      serviceAccountName: descheduler-sa
+      containers:
+        - name: descheduler
+          image: k8s.gcr.io/descheduler/descheduler:v0.21.0
+          imagePullPolicy: IfNotPresent
+          command:
+            - "/bin/descheduler"
+          args:
+            - "--policy-config-file"
+            - "/policy-dir/policy.yaml"
+            - "--descheduling-interval"
+            - "5m"
+            - "--v"
+            - "3"
+          ports:
+          - containerPort: 10258
+            protocol: TCP
+          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-policy-configmap

kubernetes/deployment/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ../base
+  - deployment.yaml