From 84e3abf33509efadbb37a4607eb0c18e12113fbe Mon Sep 17 00:00:00 2001
From: Gaurav Abbi <gaurav.abbi@sap.com>
Date: Sun, 21 Jan 2024 21:50:56 +0100
Subject: [PATCH] keda-cron-scaler: Add stateful set example

---
 .gitignore                                 |  6 +++-
 keda-cron-scaler/README.md                 |  3 +-
 keda-cron-scaler/k8s/keda-cron-scaler.yaml | 30 ++++++++++++++--
 keda-cron-scaler/k8s/statefulset.yaml      | 42 ++++++++++++++++++++++
 4 files changed, 77 insertions(+), 4 deletions(-)
 create mode 100644 keda-cron-scaler/k8s/statefulset.yaml

diff --git a/.gitignore b/.gitignore
index 43e3039a..97a04229 100644
--- a/.gitignore
+++ b/.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
\ No newline at end of file
+cap-orders-service/*/chart
+
+target/
+bin/
+.gradle/
diff --git a/keda-cron-scaler/README.md b/keda-cron-scaler/README.md
index ee3d78f4..707fee72 100644
--- a/keda-cron-scaler/README.md
+++ b/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.
diff --git a/keda-cron-scaler/k8s/keda-cron-scaler.yaml b/keda-cron-scaler/k8s/keda-cron-scaler.yaml
index daea6268..f490821b 100644
--- a/keda-cron-scaler/k8s/keda-cron-scaler.yaml
+++ b/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
diff --git a/keda-cron-scaler/k8s/statefulset.yaml b/keda-cron-scaler/k8s/statefulset.yaml
new file mode 100644
index 00000000..d8a7aec1
--- /dev/null
+++ b/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