Allow configure StatefulSet updateStrategy (#172)

templates/server-statefulset.yaml

@@ -15,7 +15,7 @@ spec:
   podManagementPolicy: Parallel
   replicas: {{ template "vault.replicas" . }}
   updateStrategy:
-    type: OnDelete
+    type: {{ .Values.server.updateStrategyType }}
   selector:
     matchLabels:
       app.kubernetes.io/name: {{ template "vault.name" . }}

test/unit/server-ha-statefulset.bats

@@ -97,6 +97,17 @@ load _helpers
   [ "${actual}" = "OnDelete" ]
 }
 
+@test "server/ha-StatefulSet: RollingUpdate updateStrategy" {
+  cd `chart_dir`
+  local actual=$(helm template \
+      -x templates/server-statefulset.yaml  \
+      --set 'server.ha.enabled=true' \
+      --set 'server.updateStrategyType="RollingUpdate"' \
+      . | tee /dev/stderr |
+      yq -r '.spec.updateStrategy.type' | tee /dev/stderr)
+  [ "${actual}" = "RollingUpdate" ]
+}
+
 #--------------------------------------------------------------------
 # affinity
 

values.yaml

@@ -76,6 +76,10 @@ server:
     # Overrides the default Image Pull Policy
     pullPolicy: IfNotPresent
 
+  # Configure the Update Strategy Type for the StatefulSet
+  # See https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#update-strategies
+  updateStrategyType: "OnDelete"
+
   resources:
   # resources:
   #   requests: