add pod disruption budget to simple-app chart

Author: juliuste

kubernetes/.charts/simple-app/Chart.yaml

@@ -1,4 +1,4 @@
 apiVersion: v2
 name: simple-app
-version: 3.0.0
+version: 3.0.1
 description: Provides a deployment, service and ingress to expose one container at a given domain

kubernetes/.charts/simple-app/templates/pod-disruption-budget.yaml

@@ -0,0 +1,14 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "app.fullName" . }}-pdb
+  namespace: {{ include "app.fullName" . }}
+  labels:
+    app.kubernetes.io/name: {{ .Release.Name }}-pdb
+    helm.sh/chart: {{ include "chart.fullName" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  selector:
+    app: {{ include "app.fullName" . }}
+  minAvailable: {{ .Values.minAvailable }}

kubernetes/.charts/simple-app/values.yaml

@@ -14,6 +14,7 @@ hosts:
   - some.example.domain
 
 replicas: 2
+minAvailable: 1
 resources:
   limits:
     cpu: 200m