feat(helm): add pdb in helm chart (#616)

Author: SatoruItaya

charts/kubernetes-external-secrets/README.md

@@ -113,6 +113,7 @@ The following table lists the configurable parameters of the `kubernetes-externa
 | `resources`                               | Pod resource requests & limits                                                                                                    | `{}`                                  |
 | `dnsConfig`                               | Dns Config for pod.                                                                                                   | `{}`                                  |
 | `imagePullSecrets`                        | Reference to one or more secrets to be used when pulling images                                                                   | `[]`                                  |
+| `podDisruptionBudget`                     | PodDisruptionBudget for pod.                                                                                                      | `{}`                                  |
 | `serviceMonitor.enabled`                  | Enable the creation of a serviceMonitor object for the Prometheus operator                                                        | `false`                               |
 | `serviceMonitor.interval`                 | The interval the Prometheus endpoint is scraped                                                                                   | `30s`                                 |
 | `serviceMonitor.namespace`                | The namespace where the serviceMonitor object has to be created                                                                   | `nil`                                 |

charts/kubernetes-external-secrets/templates/pdb.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.podDisruptionBudget -}}
+apiVersion: policy/v1beta1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ template "kubernetes-external-secrets.fullname" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  labels:
+    app.kubernetes.io/name: {{ template "kubernetes-external-secrets.name" . }}
+    helm.sh/chart: {{ include "kubernetes-external-secrets.chart" . }}
+    app.kubernetes.io/instance: "{{ .Release.Name }}"
+    app.kubernetes.io/managed-by: "{{ .Release.Service }}"
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "kubernetes-external-secrets.name" . }}
+{{ toYaml .Values.podDisruptionBudget | indent 2 }}
+{{- end -}}

charts/kubernetes-external-secrets/values.yaml

@@ -119,6 +119,8 @@ tolerations: []
 
 affinity: {}
 
+podDisruptionBudget: {}
+
 serviceMonitor:
   enabled: false
   interval: "30s"