Add updateStrategy parameter for redis StatefulSet. (#6121)

* Add updateStrategy parameter for redis StatefulSet.

* Add partition update strategy parameter for redis StatefulSet.

* Bugfix.

* Bugfix.

stable/redis/Chart.yaml

@@ -1,5 +1,5 @@
 name: redis
-version: 3.4.1
+version: 3.4.2
 appVersion: 4.0.10
 description: Open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
 keywords:

stable/redis/README.md

@@ -86,6 +86,8 @@ The following table lists the configurable parameters of the Redis chart and the
 | `master.persistence.storageClass`          | Storage class of backing PVC                                                                                   | `generic`                                            |
 | `master.persistence.accessModes`           | Persistent Volume Access Modes                                                                                 | `[ReadWriteOnce]`                                    |
 | `master.persistence.size`                  | Size of data volume                                                                                            | `8Gi`                                                |
+| `master.statefulset.updateStrategy`        | Update strategy for StatefulSet                                                                                | onDelete                                             |
+| `master.statefulset.rollingUpdatePartition`| Partition update strategy                                                                                      | `nil`                                                |
 | `master.podLabels`                         | Additional labels for Redis master pod                                                                         | {}                                                   |
 | `master.podAnnotations`                    | Additional annotations for Redis master pod                                                                    | {}                                                   |
 | `master.port`                              | Redis master port                                                                                              | 6379                                                 |

stable/redis/templates/redis-master-statefulset.yaml

@@ -154,3 +154,9 @@ spec:
       {{- end }}
     {{- end }}
   {{- end }}
+  updateStrategy:
+    type: {{ .Values.master.statefulset.updateStrategy }}
+    {{- if .Values.master.statefulset.rollingUpdatePartition }}
+    rollingUpdate:
+      partition: {{ .Values.master.statefulset.rollingUpdatePartition }}
+    {{- end }}

stable/redis/values-production.yaml

@@ -175,6 +175,13 @@ master:
     - ReadWriteOnce
     size: 8Gi
 
+  ## Update strategy, can be set to RollingUpdate or onDelete by default.
+  ## https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets
+  statefulset:
+    updateStrategy: OnDelete
+    ## Partition update strategy
+    ## https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions
+    # rollingUpdatePartition:
 
 ##
 ## Redis Slave properties

stable/redis/values.yaml

@@ -217,6 +217,14 @@ master:
     - ReadWriteOnce
     size: 8Gi
 
+  ## Update strategy, can be set to RollingUpdate or onDelete by default.
+  ## https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets
+  statefulset:
+    updateStrategy: OnDelete
+    ## Partition update strategy
+    ## https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions
+    # rollingUpdatePartition:
+
 
 ##
 ## Redis Slave properties