Chart: Deploy PodDisruptionBudget with KEDA. (#11032)

* feat: deploy PDB if Keda is enabled and the minimum amount of replicas is greater than 1

* feat: add the corresponding unit-test to check PDB deployment with Keda

* chore: rename the test of PDB to follow suggested pattern

* chore: update the test-case suite name to the new format

* Update charts/ingress-nginx/templates/controller-poddisruptionbudget.yaml

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

* Update charts/ingress-nginx/tests/controller-poddisruptionbudget_test.yaml

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

---------

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

charts/ingress-nginx/templates/controller-poddisruptionbudget.yaml

@@ -1,4 +1,10 @@
-{{- if or (and .Values.controller.autoscaling.enabled (gt (.Values.controller.autoscaling.minReplicas | int) 1)) (and (not .Values.controller.autoscaling.enabled) (gt (.Values.controller.replicaCount | int) 1)) }}
+{{- $replicas := .Values.controller.replicaCount }}
+{{- if .Values.controller.autoscaling.enabled }}
+{{- $replicas = .Values.controller.autoscaling.minReplicas }}
+{{- else if .Values.controller.keda.enabled }}
+{{- $replicas = .Values.controller.keda.minReplicas }}
+{{- end }}
+{{- if gt ($replicas | int) 1 }}
 apiVersion: {{ ternary "policy/v1" "policy/v1beta1" (semverCompare ">=1.21.0-0" .Capabilities.KubeVersion.Version) }}
 kind: PodDisruptionBudget
 metadata:

charts/ingress-nginx/tests/controller-poddisruptionbudget_test.yaml

@@ -0,0 +1,65 @@
+suite: Controller > PodDisruptionBudget
+templates:
+  - controller-poddisruptionbudget.yaml
+
+tests:
+  - it: should create a PodDisruptionBudget if `controller.replicaCount` is greater than 1
+    set:
+      controller.replicaCount: 2
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: PodDisruptionBudget
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should not create a PodDisruptionBudget if `controller.replicaCount` is less than or equal 1
+    set:
+      controller.replicaCount: 1
+    asserts:
+      - hasDocuments:
+          count: 0
+
+  - it: should create a PodDisruptionBudget if `controller.autoscaling.enabled` is true and `controller.autoscaling.minReplicas` is greater than 1
+    set:
+      controller.autoscaling.enabled: true
+      controller.autoscaling.minReplicas: 2
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: PodDisruptionBudget
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should not create a PodDisruptionBudget if `controller.autoscaling.enabled` is true and `controller.autoscaling.minReplicas` is less than or equal 1
+    set:
+      controller.autoscaling.enabled: true
+      controller.autoscaling.minReplicas: 1
+    asserts:
+      - hasDocuments:
+          count: 0
+
+  - it: should create a PodDisruptionBudget if `controller.keda.enabled` is true and `controller.keda.minReplicas` is greater than 1
+    set:
+      controller.keda.enabled: true
+      controller.keda.minReplicas: 2
+    asserts:
+      - hasDocuments:
+          count: 1
+      - isKind:
+          of: PodDisruptionBudget
+      - equal:
+          path: metadata.name
+          value: RELEASE-NAME-ingress-nginx-controller
+
+  - it: should not create a PodDisruptionBudget if `controller.keda.enabled` is true and `controller.keda.minReplicas` is less than or equal 1
+    set:
+      controller.keda.enabled: true
+      controller.keda.minReplicas: 1
+    asserts:
+      - hasDocuments:
+          count: 0