feat: add retention policy to etcd sts pvc (#129)

* add retention policy to etcd sts pvc

* run make on the documentation

Author: anvddriesch

charts/kamaji-etcd/README.md

@@ -104,6 +104,7 @@ Here the values you can override:
 | peerApiPort | int | `2380` | The peer API port which servers are listening to. |
 | persistentVolumeClaim.accessModes | list | `["ReadWriteOnce"]` | The Access Mode to storage |
 | persistentVolumeClaim.customAnnotations | object | `{}` | The custom annotations to add to the PVC |
+| persistentVolumeClaim.retentionPolicyWhenDeleted | string | `"Retain"` | What happens to PVCs created when the StatefulSet is deleted. `Retain` causes PVCs to not be affected by StatefulSet deletion, `Delete` policy causes those PVCs to be deleted |
 | persistentVolumeClaim.size | string | `"8Gi"` | The size of persistent storage for etcd data  |
 | persistentVolumeClaim.storageClassName | string | `""` | A specific storage class |
 | podAnnotations | object | `{}` | Annotations to add to all etcd pods |

charts/kamaji-etcd/templates/etcd_sts.yaml

@@ -11,6 +11,10 @@ spec:
     matchLabels:
       {{- include "etcd.selectorLabels" . | nindent 6 }}
   replicas: {{ .Values.replicas }}
+  {{- if .Values.persistentVolumeClaim.retentionPolicyWhenDeleted }}
+  persistentVolumeClaimRetentionPolicy:
+    whenDeleted: {{ .Values.persistentVolumeClaim.retentionPolicyWhenDeleted }}
+  {{- end }}
   template:
     metadata:
       name: etcd

charts/kamaji-etcd/values.yaml

@@ -75,6 +75,8 @@ persistentVolumeClaim:
   # -- The custom annotations to add to the PVC
   customAnnotations: {}
   #  volumeType: local
+# -- What happens to PVCs created when the StatefulSet is deleted. `Retain` causes PVCs to not be affected by StatefulSet deletion, `Delete` policy causes those PVCs to be deleted
+  retentionPolicyWhenDeleted: Retain
 
 # -- Labels to add to all etcd pods
 podLabels: