From da6fe0b58122160201e4362de0cbd11979ffe69c Mon Sep 17 00:00:00 2001
From: Oleg Pykhalov <go.wigust@gmail.com>
Date: Thu, 19 Oct 2023 14:44:16 +0300
Subject: [PATCH] apps: cluster1: kubernetes-dashboard: Scale to zero.

---
 .../httpscaledobject.yaml                     | 16 ++++++++
 .../kubernetes-dashboard/kustomization.yaml   |  2 +
 .../kubernetes-dashboard/scaledobject.yaml    | 38 +++++++++++++++++++
 .../cluster1/kubernetes-dashboard/values.yaml |  2 +
 4 files changed, 58 insertions(+)
 create mode 100644 apps/cluster1/kubernetes-dashboard/httpscaledobject.yaml
 create mode 100644 apps/cluster1/kubernetes-dashboard/scaledobject.yaml

diff --git a/apps/cluster1/kubernetes-dashboard/httpscaledobject.yaml b/apps/cluster1/kubernetes-dashboard/httpscaledobject.yaml
new file mode 100644
index 000000000..83b16127e
--- /dev/null
+++ b/apps/cluster1/kubernetes-dashboard/httpscaledobject.yaml
@@ -0,0 +1,16 @@
+kind: HTTPScaledObject
+apiVersion: http.keda.sh/v1alpha1
+metadata:
+  name: kubernetes-dashboard-web
+spec:
+  host: kubernetes-dashboard.home.wugi.info
+  # Optional. Default: 300 seconds.
+  # Should be smaller than kubernetes-dashboard-web-scaledobject.
+  scaledownPeriod: 150
+  scaleTargetRef:
+    deployment: kubernetes-dashboard-web
+    service: kubernetes-dashboard-web
+    port: 8000
+  replicas:
+    min: 0
+    max: 1
diff --git a/apps/cluster1/kubernetes-dashboard/kustomization.yaml b/apps/cluster1/kubernetes-dashboard/kustomization.yaml
index 607a7442b..5933e0295 100644
--- a/apps/cluster1/kubernetes-dashboard/kustomization.yaml
+++ b/apps/cluster1/kubernetes-dashboard/kustomization.yaml
@@ -3,6 +3,8 @@ kind: Kustomization
 namespace: kubernetes-dashboard
 resources:
 - ../../base/kubernetes-dashboard
+- scaledobject.yaml
+- httpscaledobject.yaml
 patchesStrategicMerge:
 - release.yaml
 configMapGenerator:
diff --git a/apps/cluster1/kubernetes-dashboard/scaledobject.yaml b/apps/cluster1/kubernetes-dashboard/scaledobject.yaml
new file mode 100644
index 000000000..494766810
--- /dev/null
+++ b/apps/cluster1/kubernetes-dashboard/scaledobject.yaml
@@ -0,0 +1,38 @@
+---
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: kubernetes-dashboard-web-scaledobject
+spec:
+  maxReplicaCount: 1
+  minReplicaCount: 0
+  pollingInterval: 3 # Optional. Default: 30 seconds
+  cooldownPeriod: 300 # Optional. Default: 300 seconds
+  scaleTargetRef:
+    name: kubernetes-dashboard-web
+  triggers:
+  - type: prometheus
+    metadata:
+      serverAddress: http://kube-prometheus-stack-prometheus.monitoring:9090
+      metricName: nginx_ingress_controller_request_duration_seconds_count
+      threshold: "0.5"
+      query: max(irate(nginx_ingress_controller_request_duration_seconds_count{host="kubernetes-dashboard.home.wugi.info"}[5m]))
+---
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: kubernetes-dashboard-api-scaledobject
+spec:
+  maxReplicaCount: 1
+  minReplicaCount: 0
+  pollingInterval: 3 # Optional. Default: 30 seconds
+  cooldownPeriod: 300 # Optional. Default: 300 seconds
+  scaleTargetRef:
+    name: kubernetes-dashboard-api
+  triggers:
+  - type: prometheus
+    metadata:
+      serverAddress: http://kube-prometheus-stack-prometheus.monitoring:9090
+      metricName: nginx_ingress_controller_request_duration_seconds_count
+      threshold: "0.5"
+      query: max(irate(nginx_ingress_controller_request_duration_seconds_count{host="kubernetes-dashboard.home.wugi.info"}[5m]))
diff --git a/apps/cluster1/kubernetes-dashboard/values.yaml b/apps/cluster1/kubernetes-dashboard/values.yaml
index 2641d0e78..db2544018 100644
--- a/apps/cluster1/kubernetes-dashboard/values.yaml
+++ b/apps/cluster1/kubernetes-dashboard/values.yaml
@@ -1,6 +1,8 @@
 # General configuration shared across resources
 app:
   ingress:
+    labels:
+      keda.cluster.local/scale-to-zero: "true"
     hosts:
     - kubernetes-dashboard.home.wugi.info
   settings: