keda-cron-scaler: Add stateful set example

.gitignore

@@ -29,4 +29,8 @@ grpc-python/__pycache__/orders_pb2_grpc.cpython-38.pyc
 grpc-python/__pycache__/orders_pb2.cpython-38.pyc
 .vscode
 
-cap-orders-service/*/chart
+cap-orders-service/*/chart
+
+target/
+bin/
+.gradle/

keda-cron-scaler/README.md

@@ -57,11 +57,12 @@ Let's put the cron-based scaler into action and assume we have a **development c
   kubectl label namespaces ${NS} istio-injection=enabled
   ```
 
-3. Create a Function and a Deployment as sample workloads.
+3. Create a Function, a Deployment and a StatefulSet as sample workloads.
 
   ```shell
   kubectl -n ${NS} apply -f k8s/deployment.yaml
   kubectl -n ${NS} apply -f k8s/function.yaml
+  kubectl -n ${NS} apply -f k8s/statefulset.yaml
   ```
 
 4. Apply KEDA cron-based scaling to these workloads.

keda-cron-scaler/k8s/keda-cron-scaler.yaml

@@ -16,7 +16,7 @@ spec:
     - type: cron
       metadata:
         # The acceptable values would be a value from the IANA Time Zone Database.
-        timezone: Europe/Berlin  
+        timezone: Europe/Berlin
         # At 08:00 AM, Monday through Friday
         start: 0 8 * * 1-5
         # At 06:00 PM, Monday through Friday
@@ -42,7 +42,33 @@ spec:
     - type: cron
       metadata:
         # The acceptable values would be a value from the IANA Time Zone Database.
-        timezone: Europe/Berlin  
+        timezone: Europe/Berlin
+        # At 08:00 AM, Monday through Friday
+        start: 0 8 * * 1-5
+        # At 06:00 PM, Monday through Friday
+        end: 0 18 * * 1-5
+        # ie. Your MINIMUM replica count for this workload
+        desiredReplicas: "1"
+---
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: test-keda-cron-ss-busybox
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: StatefulSet
+    name: test-keda-cron-ss-busybox
+  pollingInterval: 10
+  # immediately scale down the workload
+  cooldownPeriod: 0
+  # The workload is ASLEEP by DEFAULT, otherwise, it's Awake.
+  minReplicaCount: 0
+  triggers:
+    - type: cron
+      metadata:
+        # The acceptable values would be a value from the IANA Time Zone Database.
+        timezone: Europe/Berlin
         # At 08:00 AM, Monday through Friday
         start: 0 8 * * 1-5
         # At 06:00 PM, Monday through Friday

keda-cron-scaler/k8s/statefulset.yaml

@@ -0,0 +1,42 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  labels:
+    app: test-keda-cron-ss-busybox
+  name: test-keda-cron-ss-busybox
+spec:
+  serviceName: test-keda-cron-ss-busybox
+  replicas: 1
+  selector:
+    matchLabels:
+      app: test-keda-cron-ss-busybox
+  template:
+    metadata:
+      labels:
+        app: test-keda-cron-ss-busybox
+    spec:
+      containers:
+      - image: busybox
+        name: test-keda-cron-ss-busybox
+        resources:
+          requests:
+            memory: 50Mi
+            cpu: 20m
+          limits:
+            memory: 50Mi
+            cpu: 20m
+        volumeMounts:
+        - name: storage
+          mountPath: /data
+        command:
+        - sleep
+        - infinity
+  volumeClaimTemplates:
+  - metadata:
+      name: storage
+    spec:
+      accessModes:
+      - ReadWriteOnce
+      resources:
+        requests:
+          storage: 1Gi