feat: add pod-disruption-budget config

Signed-off-by: Lenin Mehedy <lenin.mehedy@swirldslabs.com>

charts/hedera-network/templates/pdb.yaml

@@ -0,0 +1,22 @@
+{{- if .Values.deployment.podDisruptionBudget.create }}
+{{ range $index, $node := $.Values.hedera.nodes }}
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: network-{{ $node.name }}-pdb
+  namespace: {{ default $.Release.Namespace $.Values.global.namespaceOverride }}
+  labels:
+    fullstack.hedera.com/type: pod-disruption-budget
+    fullstack.hedera.com/node-name: {{ $node.name }}
+spec:
+  selector:
+    matchLabels:
+      app: network-{{ $node.name }}
+  {{- if .Values.deployment.podDisruptionBudget.minAvailable }}
+  minAvailable: {{ .Values.deployment.podDisruptionBudget.minAvailable }}
+  {{- end }}
+  {{- if .Values.deployment.podDisruptionBudget.maxUnavailable }}
+  maxUnavailable: {{ .Values.deployment.podDisruptionBudget.maxUnavailable }}
+  {{- end }}
+{{- end }}
+{{ end }}

charts/hedera-network/values.yaml

@@ -290,7 +290,17 @@ deployment:
   # Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity
   affinity: {}
   priorityClassName: {}
-  podDisruptionBudget: {}
+  ## PodDisruptionBudget for fullstack testing pods
+  ## Default backend Pod Disruption Budget configuration
+  ## ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
+  ## @param deployment.podDisruptionBudget.create Enable Pod Disruption Budget configuration
+  ## @param deployment.podDisruptionBudget.minAvailable Minimum number/percentage of pods that should remain scheduled
+  ## @param deployment.podDisruptionBudget.maxUnavailable Maximum number/percentage of pods that should remain scheduled
+  ##
+  podDisruptionBudget:
+    create: false
+    minAvailable: 1
+    maxUnavailable: ""
 
 # hedera node configuration
 # Only the name of the node is required. The rest of the configuration will be inherited from `defaults` section