Enables deployment strategy configuration within the Helm chart.

pkg/helm/README.md

@@ -40,3 +40,6 @@ The chart should dump its version and appVersion in the Chart.yaml file every re
 | `ingress.enabled` | Ingress resource creation | `false` |
 | `ingress.hostname` | Ingress resource hostname | `"pgadmin4.local"` |
 | `ingress.tlsSecret` | Ingress tls secret name | `""` |
+| `strategy.type` | Deployment strategy type (RollingUpdate or Recreate) | Kubernetes default (RollingUpdate) |
+| `strategy.rollingUpdate.maxSurge` | Maximum number of pods that can be created over the desired replicas | Kubernetes default (25%) |
+| `strategy.rollingUpdate.maxUnavailable` | Maximum number of pods that can be unavailable during the update | Kubernetes default (25%) |

pkg/helm/templates/deployment.yaml

@@ -10,6 +10,15 @@ metadata:
   {{- end }}
 spec:
   replicas: {{ .Values.replicas }}
+  {{- if .Values.strategy }}
+  strategy:
+    type: {{ .Values.strategy.type }}
+    {{- if and (eq .Values.strategy.type "RollingUpdate") .Values.strategy.rollingUpdate }}
+    rollingUpdate:
+      maxSurge: {{ .Values.strategy.rollingUpdate.maxSurge }}
+      maxUnavailable: {{ .Values.strategy.rollingUpdate.maxUnavailable }}
+    {{- end }}
+  {{- end }}
   selector:
     matchLabels:
       app: {{ default "pgadmin4" .Values.commonLabels.app }}

pkg/helm/values.yaml

@@ -25,6 +25,12 @@ extraDeploy: []
 
 replicas: 1
 
+# strategy:
+#   type: RollingUpdate
+#   rollingUpdate:
+#     maxSurge: 25%
+#     maxUnavailable: 25%
+
 containerPort: 5050
 disablePostfix: true
 enableServiceLinks: false